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Italian Validation of the Sexual Desire Inventory (SDI-2): Psychometric Properties and Factorial Structure

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Objective: Sexual desire is a psychological state that prompts individuals to engage in sexual activity. Although interest about this topic is constantly increasing, there are no validated instruments to measure sexual desire in Italy, making scientific studies difficult. This paper aims to provide a contribution to validation of the Sexual Desire Inventory-2 (SDI-2) for the Italian population, investigating factorial structure, invariance, reliability and validity. Method: The sample was composed of 389 Italian participants from a nonclinical population. The thirteen-item SDI-2 and the Barratt Impulsiveness Scale (BIS-11) for measuring impulsiveness were administered. Results: The results supported two dimensions, i.e. dyadic and solitary desire, and partially measurement invariance across gender. Furthermore, good validity and reliability indicators have been gained. Conclusions: the Italian version of the SDI-2 supports good psychometrics properties. It may be considered a valid and reliable measure for assessing dyadic and solitary sexual desire. Therefore, the present inventory may be used, in the research and clinical field, as an innovative instrument in order to investigate sexual desire and its relationship with clinical disorders.
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ITALIAN VALIDATION OF THE SEXUAL DESIRE INVENTORY (SDI-2): PSYCHOMETRIC
PROPERTIES AND FACTORIAL STRUCTURE
Antonino Callea and Giorgia Rossi
Clinical Neuropsychiatry (2021) 18, 4, 223-230
Citaon: Callea, A., Rossi, G. (2021).
Italian validaon of the sexual desire
inventory (SDI-2): psychometric
properes and factorial structure.
Clinical Neuropsychiatry, 18(4), 223-
230.
doi.org/10.36131/
cnorieditore20210405
© 2021 Giovanni Fiori Editore s.r.l.
This is an open access arcle. Distribu-
on and reproducon are permied
in any medium, provided the original
author(s) and source are credited.
Funding: None.
Compeng interests: None.
Corresponding author
Callea Antonino
E-mail: a.callea@lumsa.it
OPEN ACCESS
Abstract
Objective: Sexual desire is a psychological state that prompts individuals to
engage in sexual activity. Although interest about this topic is constantly increasing,



invariance, reliability and validity.
Method

measuring impulsiveness were administered.
Results: The results supported two dimensions, i.e. dyadic and solitary desire,
and partially measurement invariance across gender. Furthermore, good validity and
reliability indicators have been gained.
Conclusions         


  
relationship with clinical disorders
Key words: sexual desire, psychometrics properties, Italian validation, structural

Antonino Callea1 and Giorgia Rossi1
1Università di Roma LUMSA, Rome, Italy

       
has greatly increased (e.g., Moyano et al., 2017;
Vallejo-Medina et al., 2020). Sexual desire has been
associated with terms such as libido, sexual interest
        
       
       
  
  

is “a psychological state subjectively experienced by
the individual as an awareness that he or she wants or
wishes to attain a (presumably pleasurable) sexual goal
        
sexual desire may be considered a driving component

      
are widely acknowledged as complex constructs
and the relation between them as intricate (Ågmo,
       
with higher sexual desire may be mostly attended to
sexual cues, increasing own sexual arousal, i.e. the
      
       
       

behavior and is positively associated with emotional
        
previous literature, sexual desire, activated by internal

considered as motivation to engage in sexual activity
(Diamond, 2004), alone or with a partner (Regan, 2013).
In other words, high sexual drive may not coincide with
sexual activities because social skills, opportunity, and




in operationalizing and measuring sexual desire (Beck,
        



literature are the Sexual Interest and Desire Inventory–
Female (SIDI-F), the Female Sexual Function Index
(FSFI), and the Sexual Desire Inventory-2 (SDI-2).
     
       


desire-distress. The inventory provides a global score

 223
RESEARCH PAPER
Antonino Callea and Giorgia Rossi
224 Clinical Neuropsychiatry (2021) 18, 4
Method
Procedure

      
(American Psychological Association, 2010). Data
was collected through an internet website survey, via a
 


    

  
       
  
In order to ensure complete anonymity, no email
     
researchers were not able to understand who, among own
contacts, has really complete the online questionnaire.
Translation and adaptation process of the SD-2
       
     
     
    
        
      
into Italian by two bilingual science experts (a
 

were reviewed and discussed in order to arrive at an
unanimously accepted version. Reviewed version
       
psychiatrists; they worked individually through a semi-
structured questionnaire to consider the clarity and
   
comments together in order to solve any inconsistencies.
     
      
those who had done the translations in the initial phase.
Finally, the accordance between the original English

Participants
      
      


        
     
       
       
separated or divorced and 0.8% were widowers. As
      
        
open relationship and 38% were not involved in any
relationship.
Instruments
A sociodemographic questionnaire was given to the
participants, with questions on gender, age, nationality,
educational level and marital status, plus a question
         
       

and hypoactive sexual desire disorder (Meston, 2003;
        
including desire, arousal, lubrication, orgasm,

        

       
items that measure two dimensions: dyadic sexual


          

“the interest or desire to engage in sexual activity with
        

        
in engaging in sexual behavior on its own, and may


In Italy, although some questionnaires have been
     
 
the Sexual Interaction Inventory, LoPiccolo & Steger,
     
Behavior Inventory by Ciocca et al., 2020), there are no
     
This is very disadvantageous as studying this construct
could lead to new knowledge, especially in the clinical

    
        


studying measurement invariance across gender. The



Furthermore, the present study aimed to explore
the positive relationship between sexual desire and
     
research and clinical practices. Previous studies
have well documented the positive relationship
between impulsiveness and sexual behavior. As a
        
revealed that impulsivity may be more important
      
relationship between sexual desire and impulsiveness
has been less investigated. In previous literature,
  
      
cybersex, but the correlation between sexual desire
and impulsiveness was not reported. Impulsiveness
      
      
planning impulsiveness. Attentive impulsiveness
concerns making quick decisions, motor impulsiveness
involves acting without thinking and non-planning



whether sexual behaviors are generally predicted by
impulsiveness, sexual desire dimensions may not be
related to impulsiveness dimensions. In other words,
in order to test discriminant validity the correlations
       
impulsivity was tested.
Italian validation of the sexual desire inventory (SDI-2): psychometric properties and factorial structure
Clinical Neuropsychiatry (2021) 18, 4 
 
      
       
EFA showed measurement invariance across gender.
Following the recommendations and guidelines
(Cheung & Rensvold, 2002; Vandenberg & Lance,
     
     
      
intercepts constrained equal) were tested in order.
The invariance models were evaluated using the
   2    
Tucker-Lewis index (TLI) and root mean square error
       
           

Results

supported by EFA results: the KMO index is equal to
2
p
gure 1



Table 1 reported the component loading matrix,
with the oblimin rotation, eigenvalues and percentage

        
          
     
  
       
       


were positively correlated (rp
Table 2

The results indicated that the items showed good
psychometrics properties, thus contributing to measure
the latent variables. Furthermore, both SD-S and SD-D
had good internal consistency, with Cronbach’s alpha

First, power analyses were carried out in order to
    
months.
        

desire (SD-D) and solitary sexual desire (SD-S). This
two-dimensional structure presents good psychometric
      

The Barratt Impulsiveness Scale (BIS-11; Patton
  
  
      
     
impulsiveness, motor impulsiveness and non-planning

BIS-11 is considered a theory-neutral model (Moeller et
al., 2001). The good psychometric properties, reliability
        
 
adaptation (Fossati et al., 2001). Higher scores indicate
high impulsiveness.
Data Analysis
      
      
       

      
sample. The sampling adequacy was investigated using
the Kaiser-Meyer-Olkin (KMO) test and Bartlett’s test

adequate when the KMO index is close to 1 and

        
      
      


loading matrix was explored to ascertain the items in


 

Psychometrics properties, reliability, invariance and
Figure 1. Parallel Analysis
Antonino Callea and Giorgia Rossi
 Clinical Neuropsychiatry (2021) 18, 4

     
gender, the unconstrained baseline model adequately
        
    
      
2. However, the CFI decreased only slightly,

     
conducting a CFA with structural equation model (SEM;
 

r



latent variables and thirteen observed variables, was N

Table 1. Factor loading matrix, eigenvalues and the percentages of variance
PC1 PC2
SDI1 Durante l'ulmo mese, quanto spesso  sarebbe piaciuto intraener nell'avità sessuale con
un partner? (During this last month, how oen would you have liked to engage in sexual acvity
with a partner?)
.54 -.09
SDI2 Durante l'ulmo mese, quanto spesso hai avuto fantasie sessuali che coinvolgono un partner?
(During this last month, how oen have you had sexual thoughts involving a partner?) .48 -.01
SDI3 Quando hai delle fantasie sessuali, quanto è forte il tuo desiderio di intraprendere un'avità
sessuale con un partner? (When you have sexual thoughts how strong is your desire to engage in
sexual behavior with a partner?)
.76 .01
SDI4 Quando vedi per la prima volta una persona araente, quanto è forte la tua arazione sessuale?
(When you rst see an aracve person, how strong is your sexual desire?) .59 .19
SDI5 Quando passi del tempo con una persona araente, quanto è forte il tuo desiderio sessuale?
(When you spend me with an aracve person, how strong is your sexual desire?) .53 .26
SDI6 Quando sei in una situazione romanca, quanto è forte il tuo desiderio sessuale? (When you
are in romanc situaons how strong is your sexual desire?) .48 .07
SDI7 Generalmente, quanto è forte il tuo desiderio di intraprendere l'avità sessuale con un
partner? (How important is it for you to fulll your sexual desire though acvity with a partner?) .85 -.06
SDI8 Quanto è importante per te soddisfare il tuo desiderio sessuale araverso l'avità con un
partner? (Compare to other people of your age and sex, how would you rate your desire to behave
sexually with a partner?)
.80 -.21
SDI9 In confronto ad altre persone della tua età e del tuo stesso genere, come valu il tuo desiderio
di avere rappor sessuali? (During this last month, how oen would you have liked to behave
sexually by yourself?)
.62 .18
SDI10 Durante l’ulmo mese, quanto spesso  sarebbe piaciuto intraprendere l’autoerosmo? (How
strong is your desire to engage in sexual behavior by yourself?) -.07 .72
SDI11 Quanto è forte il tuo desiderio di autoerosmo? (How important is it for you to fulll your
desires to behave sexually by yourself?) .20 .78
SDI12 Quanto è importante per te soddisfare il tuo desiderio di autoerosmo? (Compared to other
people your age and sex, how would you rate your desire to behave sexually by yourself?) -.10 .85
SDI13 In confronto ad altre persone della tua età e del tuo stesso genere, come valu il tuo desiderio
verso l'autoerosmo? (How long could you go comfortably without having sexual acvity of some
kind?)
.14 .81
Eingevalue 4.59 2.03
% of variance 35.30% 15.64%
Table 2. Psychometric properties of SDI-2 items and reliability
Dimensions Item M(SD) Skewness Kurtosis Cit
cα-i α total Total M(SD)
SD-D SDI1 5.49(1.86) -0.64 -0.18 .58 .86
.87 50.52(11.35)
SDI2 5.40(2.09) -0.63 -0.63 .60 .86
SDI3 6.33(1.56) -1.06 0.96 .67 .85
SDI4 4.78(1.97) -0.16 -0.86 .61 .86
SDI5 4.85(2.05) -0.25 -0.85 .61 .86
SDI6 5.63(1.67) -0.46 -0.45 .48 .87
SDI7 6.30(1.50) -0.94 0.64 .75 .85
SDI8 6.31(1.68) -1.09 0.76 .61 .86
SDI9 5.44(1.71) -0.58 0.23 .62 .86
SD-S SDI10 4.47(1.51) 0.01 -0.09 .56 .85
.84 17.90(6.04)
SDI11 4.37(2.12) -0.08 -1.05 .80 .74
SDI12 4.85(1.38) -0.26 1.36 .65 .82
SDI13 4.21(2.19) 0.00 -1.09 .78 .75

Italian validation of the sexual desire inventory (SDI-2): psychometric properties and factorial structure
Clinical Neuropsychiatry (2021) 18, 4 227
be accurately compared has been well highlighted in
    
is even more relevant when the instrument measure a
bit investigated construct and when does not exist other
      
       
 
population.

         
180 participants. Previous studies about dimensions
      

      

et al., 2017) and Colombian (Vallejo-Medina et al.,
      
model; besides solitary desire (SD-S), dyadic sexual
   

(Cheung & Rensvold, 2002). Metric invariance was
      
attributed the same meaning to the latent variables.

2
decreased. Table 3     
comparisons among models. Scalar invariance was not
     
     
(table 4).
Finally, in order to test convergent and discriminant
validity, correlations were carried out between the

Table 5

Discussion
      

Table 3. Tests of the measurement invariance across gender (Men = 187 vs. Women = 202)
Model χ2df CFI TLI RMSEA Δχ2Δdf Δ CFI
M0. Congural Invariance 721.47 128 .879 .731 .154 - - -
M1. Metric Invariance 763.25 139 .870 .739 .152 41.78** 11 .009
M2. Scalar Invariance 1743.72 143 .685 .350 .240 980.47** 4 .185
Table 4. Standard scores of the two-factor structure of the SDI-2 in men and women
Males (N=187) Females (N=202)
SD-D SD-S SD-D SD-S
M54.41 20.24 46.92 15.73
SD 9.36 5.44 11.86 5.75
Skewness -0.69 -0.34 -0.44 0.22
Kurtosis 0.56 0.17 0.05 -0.52
α.84 .84 .87 .81
Percent
1 26 6 14 4
5 35 10 26 7
15 45 15 34 10
25 49 17 38 11
35 51 19 43 12
50 55 21 49 16
65 59 23 52 18
75 61 24 55 20
85 64 26 59 22
95 68 29 65 24
99 72 32 69 30
Note: SD-D = dyadic sexual desire; SD-S = solitary sexual desire.
Table 5. Correlations between the SDI-2 dimensions and three factors of impulsivity
SD-D SD-S AI MI NPI
SD-D - .37** -.00 .11 -.09
SD-S .57** - .14 .22* -.13
AI .09 .09 - .52** .39**
MI .13 .17* .46** - .31**
NPI -.07 .00 .24** .32** -
Note ‒ SD-D = dyadic sexual desire; SD-S = solitary sexual desire.AI = aenonal impulsiveness. MI = motor impulsiveness. NPI
= non-planning impulsiveness.
Values above the diagonal are based on men’s scores. Values below the diagonal are based on women’s scores. * p< .05; **
p < .01.
Antonino Callea and Giorgia Rossi
228 Clinical Neuropsychiatry (2021) 18, 4

marital status. Furthermore, it is important to highlight

       


allow us to administer psychopathological tests, which
would be interesting to investigate. Further studies
should consider clinical samples, including patients
with bipolar disorder (BD) characterized by an increase

       



interest in sex and having multiple partners, compared


In addition, the SDI-2 could help to investigate
sexual desire in men and women with borderline

         




       
clinical groups with a control group, in order to show

Conclusions
In conclusion, the present study showed empirical
evidences about the reliability, external validity,
      

        
literature gap. Furthermore, the study supported the
  
       

         
     
speaking, the SDI-2 may be administrated in Italian
patients with sexual disorders in order to provide new
     
sexual activity and sexual desire. Furthermore, it can
be used in clinical practice to analyze and highlight

clinical patients.

Agmo, A. (2010). On the intricate relationship between sexual
motivation and arousal. Hormones and Behavior, 59,

American Psychological Association (2010). Ethical
Principles of Psychologists and Code of Conduct. 
.
American Psychiatric Association. (2013). Diagnostic and
statistical manual of mental disorders th ed.). American
Psychiatric Association.
       
         
(Eds.), Motivation, emotion and personality (pp. 137–

        
overview. Journal of Consulting and Clinical Psychology,
  


       
  

activity with a partner; SD-S concerns an interest in




psychometric properties. Furthermore, Cronbach’s
alpha and total item correlation suggested that all items

 
         
solitary dimensions. These results indicated that SDI-2

Third, we investigated the measurement invariance
       
supported; this result suggested that men and women
attributed the same meaning to the latent variables. In
other words, items were able to measure adequately

scalar invariance was not supported, suggesting that
       
sexual desire men and women (e.g., Petersen & Hyde,


Finally, concerning external validation, we
calculated the correlation between the SD-D and SD-S


women. The results showed that SD-D is not related to

SD-D and impulsivity. In other words, this result
supported the theory that sexual desire and behavior are



  
this result indicated that men and women with high
      

        

To summarize, the present studies may theoretically
and practically contribute to previous studies. From

       
       
a validated instrument to measure sexual desire in
Italian context. Finally, the present study shad light
        
       

      
practical implications: dyadic and solitary domains are

  
       
validation seems suggesting the importance to

sexual desire.
Limitations and Further Studies

N

    
increased to obtain greater representativeness and allow
Italian validation of the sexual desire inventory (SDI-2): psychometric properties and factorial structure
Clinical Neuropsychiatry (2021) 18, 4 
        

disorder and in women with hypoactive sexual desire
disorder. Journal of Sex & Marital Therapy, 29

Moeller, F. G., Barratt, E. S., Dougherty, D. M., Schmitz,
         
impulsivity. American Journal of Psychiatry, 158(11),
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

Cognition & Emotion, 29(8),

Moyano, N. P., Vallejo-Medina, P., & Sierra. J. C. (2017).
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
        
test development. Psicothema, 31  

Nisenbaum, R., Links, P. S., Eynan, R., & Heisel, M. J.
      
intensity in patients with borderline personality disorder
and recurrent suicidal behavior: Multilevel analyses
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
          
      
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
 

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. The
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     Journal of
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     
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
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      
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Psychometrika, 30
         
      
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
          
  
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

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
Sexual desire
disorders

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

       
Archives of Sexual Behavior, 3
Meana, M. (2010). Elucidating women’s (hetero)sexual
     
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
Antonino Callea and Giorgia Rossi
230 Clinical Neuropsychiatry (2021) 18, 4
JMIR Mental
Health, 6
Vandenberg, R. J., & Lance, C. E. (2000). A review and synthesis
     
    
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
. Psychological Review,
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
       
Scale development research: a content analysis
     The
Counseling Psychologist 34  

      .
International Journal of Impotence Research, 17, 148–

        
structure pattern on random data eigenvalues: Implications
      Educational and
Psychological Measurement, 58

Vallejo-Medina, P., Rojas-Paoli, I., & Álvarez-Muelas, A.
       
Colombia. Journal of Sex & Marital Therapy, 46

        
       

... EASI (range 0-72), Pruritus Numeric Rating Scale (P-NRS) (range 0-10) evaluated as peak score during the past 7 days, and DLQI score (range 0-30) were used for the assessment. To evaluate the impact of both AD and dupilumab treatment on the features relating to sexuality that we aimed to investigate, we used the Sexual Desire Inventory-2 (SDI-2), a validated instrument consisting of 14 items (9 with responses on an 8-point Likert scale), which measures the multidimensional construct of the level of sexual desire, where sexual desire is defined as the interest in or desire to have sexual activity ( Figure S1) [14,15]. The SDI-2 items were selected using the diagnostic criteria used in the DSM-III-R for Hypoactive Sexual Desire Disorder (HSDD) and clinical experience in the assessment and treatment of sexual desire disorders [14][15][16][17]. ...
... To evaluate the impact of both AD and dupilumab treatment on the features relating to sexuality that we aimed to investigate, we used the Sexual Desire Inventory-2 (SDI-2), a validated instrument consisting of 14 items (9 with responses on an 8-point Likert scale), which measures the multidimensional construct of the level of sexual desire, where sexual desire is defined as the interest in or desire to have sexual activity ( Figure S1) [14,15]. The SDI-2 items were selected using the diagnostic criteria used in the DSM-III-R for Hypoactive Sexual Desire Disorder (HSDD) and clinical experience in the assessment and treatment of sexual desire disorders [14][15][16][17]. An SDI-2 score value ≤ 45 indicates reduced sexual desire. ...
... Supplementary Materials: The following supporting information can be downloaded at: https: //www.mdpi.com/article/10.3390/medicina58121708/s1, Figure S1: Sexual Desire Inventory-2 (SDI-2) [14,15] questionnaire administered to 328 patients with moderate-to-severe atopic dermatitis. Data Availability Statement: Data sharing not applicable to this article as no datasets were generated or analyzed during the current study. ...
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he multifaceted field of women's sexuality has expanded as a field of inquiry over the last 25 years to encompass a wide range of new perspectives, theories, topics, findings, and controversies. The chapters in this work review and question the utility of standard sexuality frameworks, addressing purely biological models, heteronormative definitions of sexuality, and others; and provide new insights and approaches to understanding women's sexuality. The intersectional and contextual nature of women's sexuality and how it is inextricably connected to women's relational, social, economic, and cultural contexts is highlighted. The Essential Handbook of Women's Sexuality includes in-depth coverage of a wide range of women's sexuality topics, including sexual desire and satisfaction; sexuality in relationships; development across the lifespan; sexuality concerns in diverse countries; pornography; lesbian, bisexual, and transgender women; women from diverse backgrounds; health and sexuality; reconceptualizations of women's sexual problems; trauma, rape, and intimate partner violence; and mental health and therapy. These volumes can serve as a resource for students, researchers, and anyone seeking a greater understanding of women's sexuality.
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Sexual desire is a cognitive and affective state that motivates an individual to engage in sexual activity. There are no validated measures to assess this construct in Colombia. The present study aimed to validate the Sexual Desire Inventory (SDI) and explore gender-and age-based differences in sexual desire in Colombian population. The sample was composed of 2,125 men and women who answered the Colombian version of the SDI. Results indicated strict invariance between genders, a three-dimension model, and acceptable validity and reliability indicators. Gender-based and age-based differences were observed in the three types of sexual desire. Implications and conclusions of these findings are presented.
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The Sexual Desire Inventory (SDI), developed by Spector, Carey, and Steinberg in 1996, has been widely used to assess sexual desire in men and women throughout the world. This questionnaire categorizes sexual desire in two dimensions: dyadic sexual desire and solitary sexual desire. Our study addressed the factorial structure of the SDI, an aspect that until now has been largely neglected. We recruited two samples of Spanish men and women involved in stable heterosexual relationships. The first sample consisted of 3,417 subjects (1,600 males and 1,817 females), ages 18 to 84; the second sample consisted of 677 subjects (285 males and 392 females), ages 18 to 50. The results of an exploratory factor analysis (EFA) showed that instead of two dimensions the SDI should have three: (1) partner-focused dyadic sexual desire, (2) general dyadic sexual desire for an attractive person, and (3) solitary sexual desire. A confirmatory factor analysis (CFA) supported the robustness of this new three-factor structure. No gender differences were revealed, except for dyadic sexual desire for an attractive person, for which men reported higher scores. Good validity and reliability values were obtained. Moreover, standard scores for men and women by different age groups were developed.
Article
Objective: Sexual activity is an important dimension within quality of life. The fundamental psychological needs of an individual are represented by four psychodynamic factors: attachment, autonomy, sexual identity, and self-esteem. Sexual disorders are common in psychiatric patients and include desire, arousal, orgasmic, and pain disorders. Along with the positive aspects of human sexuality, however, mental illnesses can also affect an individual's sexual health. We believe that this area of research lacks standard tools to highlight the presence of sexual problems and the associated personality traits in psychiatric patients (men and women). For these reasons, we developed a brief, practical, and simple self-reported questionnaire that would address most of the common sexual problems in psychiatric patients. Methods: Following the methodology used in many research studies, we chose a list of items. The resulting 31-item questionnaire was administered to a sample of psychiatric patients (149 men and 333 women), to verify internal consistency and validity. We used factor analysis to identify underlying variables (or factors) that explain the pattern of correlation within a set of observed variables. Internal consistency of the questionnaire was assessed through Cronbach's alpha coefficient. Twelve questions were shown to have no statistical significance. The final instrument consisted of 19 questions on a 5-point Likert scale: Always, Often, Sometimes, Rarely, and Never (see Appendix 1). Subjects were required to fill the 19-item questionnaire based on experiences from the previous 12 months. All subjects completed the MMPI, from which we obtained special scales for Low Self-esteem, Neuroticism, Anxiety Index, Ego Strength, Extroversion, and Sex ProbIems Scale (I-SP). The subjects were also required to complete the Toronto Alexithymia Scale (TAS-26), and the Eating Attitude Test (EAT-26), an instrument used for the analysis of eating disorders. Results: The Sexual Dysfunction Questionnaire (SDQ) displayed excellent internal consistency, with a Cronbach alpha of 0.85. Kendall tau-b ranged from 0.19 to 0.38. The analysis of 19 items was run with Varimax rotation. In these results (Table I), the cumulative percentages show that the first two factors account for 99.58% of the variation. Multiple regression (Table II) highlighted that the personality involved in sexual problems is introverted, passive, or suspicious, with high anxiety, low self-esteem, and a high rate of neuroticism. Logistic regression (Table III) indicated that the probability of finding a sexual dysfunction increases 1.16 times for every point of increase in the score scale. Moreover, when the value of the scale is £ 45 the probability of observing sexual issues is 8.76 times greater than when the scale values are < 44. A cut-off score of 45 matches a sensitivity of 88.4% and a specificity of 79.1%. Conclusions: The psychometric data indicate that the SDQ is a valid, reliable, and satisfactory measure for describing sexual dysfunction in Psychiatric patients (men and women). Moreover, it is a brief self-report inventory, typically requiring 5 min of the patient's time for completion and is well suited for use in both clinical and research settings.