Sybil B. G. Eysenck's research while affiliated with London Research Institute and other places

Publications (98)

Article
This article outlines the history and development of the Junior Eysenck Personality Questionnaire (JEPQ) by Professor Hans J. Eysenck and Dr. Sybil B.G. Eysenck, which culminated in sampling tens of thousands of children and adolescents across many countries, aided by psychologists in each country. The cross-cultural analysis methodology is then br...
Article
Cross-cultural invariance of personality measurement provides important information regarding the universality of personality traits. With the recent release of historical data from 33 countries on the Eysenck Personality Questionnaire (EPQ) the opportunity arose to test the invariance of the three personality dimensions measured by the EPQ, togeth...
Article
Full-text available
Cross-cultural projects were undertaken, over some 25 years, to standardise the EPQ (both Adult and Junior forms) for many countries (See Appendix B for a list).Together with the rationale as to why these studies were undertaken, the statistical methodology is explained. Although the studies were published, it seemed timely to list them, together w...
Chapter
Extraversion has been recognized as a major personality variable in contemporary psychological writings. It may be viewed as a personality dimension that describes a number of more specific personality traits, ranging from sociability and liveliness to dominance and adventure seeking. Extraversion is thought to have a biological basis associated wi...
Article
Three hundred and seventy-seven male and 425 female Norwegian subjects completed the translated Eysenck Personality Questionnaire (EPQ). Factor comparisons all exceeded 0.97, so that the factors of Psychoticism (P), Extraversion (E), Neuroticism (N) and Social Desirability or Lie Scale (L) can be considered to be identical with those found in Engla...
Article
Full-text available
The factorial similarity of Psychoticism (P), Extraversion (E), Neuroticism (N), and Social Desirability (L), as measured by the Eysenck Personality Questionnaire, was assessed using gender- specific data collected from 34 countries. As in an earlier study using data from 24 countries (Eysenck et al., 1985), the Kaiser-Hunka-Bianchini (KHB) procedu...
Article
-This study reports on the gender differences in the responses ro 34 questions comprising the Eysenck Personality Questionnaire, as recorded by 508 males and 873 females who constituted the American standardization group for he questionnaire. The mean difference on the resulting M-F scale is statistically significant, being 2.28f 0.30 for the Briti...
Article
Four hundred and eighty three Iranian boys and 593 Iranian girls completed the Junior Eysenck Personality Questionnaire. Reliabilities (alpha coefficients) were all high except that for extraversion in girls. Intercorrelations of the scales showed a high social desirability involvement with Psychoticism (P) and Neuroticism (N), suggesting dissimula...
Article
Six hundred and fifteen male and 642 female Canadian subjects completed the Eysenck Personality Questionnaire-Revised in Canada. All but one factor comparison exceeded 0.90 and this and an independent space analysis confirmed that the factors of P, E, N and L were identical in Canada as in England. Reliabilities were very high except for P, which w...
Article
Linear regression equations are presented below that estimate each EPQR full scale score from the short form scale score. These equations were computed over 747 female and 517 male subjects, drawn from the U.K. reference sample of the EPQR questionnaire. Goodness of fit estimates range from a low of 74% to a maximum of 90%. Examination of alternati...
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Full-text available
476 Egyptian males and 486 females completed both the 17 (Impulsiveness Questionnaire) and the EPQ (Eysenck Personality Questionnaire) translated into Arabic. Factor comparisons were high for Impulsiveness, Ventur, esomeness and Empathy suggesting very good agreement in Egypt with these factors as measured in England. Omitting some inappropriate i...
Article
The EPQ was administered to 592 male and 562 female subjects, mainly non-students, together with a 43-item Machiavellianism scale slightly altered from the original, and with several newly written items added. Detailed factorial analyses disclosed that the M scale measured a single, clearly defined factor which correlated positively with P and E, a...
Article
538 males and 529 females completed the translated Eysenck Personality Questionnaire (EPQ) in Russia. Factor comparisons all exceeded 0.95 except that for Psychoticism (P) for females which was 0.92. We may, therefore, assume that the factors of Extraversion (E), Neuroticism (N) and Social Desirability or Lie scale (L) are measuring the same in Rus...
Article
Full-text available
Summary: 401 men and 475 women completed the Dutch version of the Eysenck Personality Questionnaire. Factor comparisons all exceeded 0.97 so that the factors of Psychoticism, Extraversion, Neuroticism, and Social Desirability are deemed to be identical in the two countries, England and The Netherlands. Sex differences conform with those in most oth...
Article
The EPQ translated into Finnish was completed by 501 males and 448 females. Factor comparisons, on the EPQ, all exceeded 0.96, so that factors Psychoticism (P), Extraversion (E), Neuroticism (N) and Social Desirability (L) were deemed to be identical in Finland and England. Sex differences were in line with the usual results, i.e. males scoring hig...
Article
Full-text available
679 Egyptian boys and 696 girls completed the Junior Eysenck Personality Questionnaire, translated into Arabic. Factor comparisons were moderately high for extraversion and social desirability but weak for neuroticism and psychoticism. Suitable item substitution produced a scoring key resulting in adequate reliabilities with the exception of a some...
Article
Five hundred and thirty-one Swedish boys and 559 Swedish girls completed the Junior Eysenck Personality Questionnaire (J.EPQ) translated into Swedish by the authors (A.-L.v.K. and L.v.K.). Factor comparisons indicated virtually identical factors of Psychoticism (P) Extraversion (E), Neuroticism (N) and social desirability—Lie (L)—in Sweden as in En...
Article
Fifty-nine female patients with anorexia nervosa were compared with 122 bulimics on their EPQ scores and an addiction score derived from the EPQ. The bulimics scored significantly higher than the anorexics on Psychoticism and Neuroticism, and lower on Social Desirability. They also scored considerably higher on addiction, and tended to be more like...
Article
The Junior Eysenck Personality Questionnaire was given to 457 boys and 431 girls in Austria. Factor comparisons indicated that the dimensions of psychoticism, extraversion, neuroticism, and social desirability were identical in Austria and in England. Minimal item changes were required to produce a viable Austrian scoring key with satisfactorily hi...
Article
Haraldsson, E. & Eysenck, S. B. G. 1987. A Cross‐Cultural Study of Personality: Icelandic Children and English Children. Scandinavian Journal of Educational Research 31, 123‐127. 621 boys and 604 girls were given an Icelandic translation of the 97‐item Junior Eysenck Personality Questionnaire. Although some items were found inappropriate for use in...
Article
Forty-five female patients attending for treatment for bulimia nervosa completed the EPQ and an Impulsiveness Inventory (I7). An Addiction score, derived from items on the EPQ, was obtained confirming that this group of bulimic patients score almost as high as drug addicts and certainly well above the normal range. On individual personality scales,...
Article
Two hundred and eighty-two male students and 264 male craftsmen were asked to complete the EPQ and the I5 Impulsiveness Questionnaire. Results showed students scored lower on P, E and Imp but higher on Emp than craftsmen. Intercorrelations, reliabilities, means and standard deviations of all seven personality scales are given, these being good repl...
Article
Two large-scale applications of the EPQ were carried out on U.S. samples and the dimensions of personality resulting from factor analyses of the resulting matrices of intercorrelations compared with similar data obtained from the original standardization groups of the EPQ in England. It is concluded that very similar factor structures obtained in t...
Article
556 boys and 725 girls (average ages 13.19 and 12.81 yrs, respectively) from Northern Ireland completed the Junior Eysenck Personality Questionnaire. The same factors of Psychoticism, Extraversion, Neuroticism and Lie (Social Desirability) emerged in Northern Ireland as in England. Reliabilities of all 4 factors were satisfactorily high after minim...
Article
In view of certain psychometric deficiencies of the original Psychoticism scale, an attempt was made to improve the scale by adding new items. It was attempted to increase the internal reliability of the scale, improve the shape of the distribution and increase the mean and variance score. Two different studies are discussed. Reliabilities are now...
Article
A total of 1320 Ss (559 males and 761 females) completed the I6 Impulsiveness Questionnaire. Reliabilities, scale intercorrelations, means and standard deviations as well as age means are given after some item changes from the original I5 Questionnaire. The resulting I7 Impulsiveness Questionnaire is reproduced in the Appendix, together with the sc...
Article
688 men and 362 women were given the 101-item version of the Adult Eysenck Personality Questionnaire which had been translated into Hebrew. Factor comparisons indicated that identical factors of Psychoticism, Extraversion, Neuroticism, and Social Desirability were observed in Israeli data. Reliabilities were satisfactorily high for all factors exce...
Article
A total of 1505 children (633 boys and 872 girls) completed the I6 Impulsiveness Questionnaire. Reliabilities, scale intercorrelations and means and standard deviations are given after slight modifications were made to the original scoring key on the basis of factor analyses. Age means for both sexes are also given.
Article
The means for each scale score from the Eysenck Personality Questionnaire were compared individually and conjointly across 25 countries. Comparisons were carried out using coded difference scores, Pearson correlations, Euclidean distances, cluster analyses and non-metric multidimensional scaling. It was possible to compare the personality (as defin...
Article
506 Sri Lankan men and 521 women completed the Eysenck Personality Questionnaire (EPQ) translated into Sinhala. Factor comparisons were all high enough to claim that all dimensions measured by the EPQ are virtually identical in Sri Lanka and England. Several item changes were required to produce a viable scoring key, but even then, reliabilities we...
Article
The Junior Eysenck Personality Questionnaire was completed by 1117 boys and 1199 girls in Greece. Factor comparisons indicated that the dimensions of Psychoticism, Extraversion, Neuroticism and Social Desirability were identical in Greece and in England. Some item changes were required for the scoring key but reliabilities of all factors were satis...
Article
Nine hundred and twenty-one males and 555 females in Uganda completed the Eysenck Personality Questionnaire. Indices of factor comparison indicated that the personality dimensions of P, E, N and L were virtually identical in Uganda and England. Some item changes were required to establish satisfactory reliabilities (alpha) for all factors. Sex diff...
Article
Twenty-three adult and nine junior cross-cultural studies of the Eysenck Personality Questionnaire (EPQ) are reviewed. Male and female subjects from 26 different countries were invited to complete translated versions of the EPQ. The data were analysed to give factor comparisons to indicate the degree of resemblance of each country studied to the Br...
Article
577 men and 567 women were given the 101-item version of the Eysenck Personality Questionnaire, translated into Icelandic. Although some items were inappropriate for use in Iceland, a viable scoring key was suggested and all reliabilities, except perhaps for Psychoticism, were satisfactory. Indices of factor comparison showed very clearly identical...
Article
The Junior Eysenck Personality Questionnaire was administered to 1,058 7–15 yr old Canadians. Factor patterns of the test items were compared with those reported for British children. Results of factor analyses confirmed a strong similarity between the Canadian and British samples in the loadings of most items on Psychoticism, Extraversion, Neuroti...
Article
542 Canadian boys and 508 Canadian girls completed the Junior Eysenck Personality Questionnaire as well as the I6 Junior Impulsiveness Inventory. Separate factor analyses of boys' and girls' I6 responses yielded results similar to those obtained for British children although several items were either dropped or moved to a different scale. Correlati...
Article
Personality descriptions of successful American professionals were compiled from their biographies. The precise birth times, dates and locations of the 500 subjects were obtained from official American records. The precise positions of the planets Mars, Jupiter and Saturn were calculated for each person, with particular attention being paid to the...
Article
The 90-item adult version of the Eysenck Personality Questionnaire was translated into Chinese and administered to 270 male and 462 female subjects in Hong Kong. In a second study the 81-item version of the Junior EPQ (JEPQ) was translated into Chinese and given to 698 boys and 629 girls.Reasonably valid scales for use in Hong Kong are suggested fo...
Article
A group of 641 delinquent subjects at a detention centre were given a 63-item questionnaire purporting to measure Impulsiveness, Venturesomeness and Empathy. Of these, 614 subjects also completed a Personality Questionnaire measuring Psychoticism, Extraversion, Neuroticism and Social Desirability. Factor analysis of the 63-item questionnaire confir...
Article
The relation between antisocial behavior and personality was investigated in 72 well behaved schoolboys, 45 badly behaved schoolboys and 30 delinquent boys, aged 13 to 15 yr. The only significant difference between delinquents and badly behaved schoolboys was in the degree of antisocial behavior, suggesting that the latter might be the potential de...
Article
An Impulsiveness inventory was completed by 118 boys and 309 girls from London comprehensive schools. Of these, 101 boys and 306 girls also completed the Eysenck Junior Personality Questionnaire and an Antisocial Behaviour Scale. Intercorrelations of the scores suggest that there is a strong link between antisocial behaviour in children and impulsi...
Article
The Eysenck Personality Questionnaire (E.P.Q.) was used to compare the structure of personality in Brazilian and English men and women, and to compare the mean scores of these population on the test. Six hundred and thirty six male and 760 female Brazilian adults were compared with 500 English males and 500 English females. It was found that identi...
Article
1150 Hungarian boys and 1035 girls were given the Junior Eysenck Personality Questionnaire translated into Hungarian. Product-moment correlations were factored by principal components methods, rotated by Varimax and then obliquely by Promax. Thirteen extra items, added for substitution if necessary, were included in this analysis. Very close agreem...
Article
A 63-item questionnaire containing items measuring impulsiveness, venturesomeness and empathy was given to 299 boys and 204 girls; 251 of these boys and 143 of these girls were also administered the Junior Eysenck Personality Questionnaire, measuring Psychoticism (P), Extraversion (E), Neuroticism (N), and dissimulation (L scale, also possibly a me...
Article
A sample of 336 male and 318 female Australian adults was administered the Eysenck Personality Questionnaire (E.P.Q.), and the items were intercorrelated and factor analyzed. Results were compared with the results obtained from an English sample of 2312 males and 3262 females, using indices of factor comparison. Identical factors corresponding to t...
Article
A study was undertaken comparing the responses of schoolchildren (ages 10–15 years) in Japan (N = 1091) with those in England (N = 2320) on the Eysenck Personality Questionnaire. Factor analyses showed that identical factors could be found in both samples, corresponding to P (psychoticism), E (extraversion), N (neuroticism), and L (a Lie or dissimu...
Article
The genetic and environmental contributions to the trait of sensation seeking were analyzed using the responses of 422 pairs of twins to the Sensation Seeking Scale (Form IV). The biometrical method of Jinks and Fulker was applied to the data. The data fit the model indicating the likelihood of a predominantly additive gene action controlling the g...
Article
Comparisons are reported between results on the Eysenck Personality Questionnaire obtained from 491 male and 480 female Slovene-speaking Jugoslavs; the comparison groups were 2312 male and 3262 female English subjects. Factor analyses of item intercorrelations showed close correspondence between the factors extracted in the two national samples, wi...
Article
The precise birth dates and locations of several thousand famous French scientists, sportsmen, and actors were ascertained from their biographies, as well as personality descriptions. From the data relating to birth times and locations the precise positions of the planets Mars, Jupiter and Saturn were calculated for each person, with particular att...
Article
A 63-item questionnaire was constructed for the measurement of three primary personality traits; impulsiveness, venturesomeness, and empathy. This questionnaire, together with the Eysenck Personality Questionnaire which measures personality dimensions Psychoticism, Neuroticism, and Extraversion, was administered to 402 male and 787 female adult sub...
Article
The criminal propensity scale from the Junior Eysenck Personality Questionnaire was administered to five groups of adolescent boys. School boys were classified into four groups of 20 each by staff ratings and a self-report questionnaire of antisocial behavior. The fifth group of 20 was comprised of delinquent boys in detention. Well behaved boys, l...
Article
A comparative study was carried out on Greek and English samples, using the Eysenck Personality Questionnaire. Factor analysis of intercorrelations between items showed that very similar factors emerged in the two national groups, suggesting that the structure of personality in both was sufficiently similar to carry out comparative studies. Externa...
Article
The recently published Junior Eysenck Personality Questionnaire contains scales to measure the personality dimensions of Extraversion, Neuroticism, and Psychoticism, as well as a Lie (dissimulation) factor. In view of the large volume of standardization data cross-cultural studies of personality structure are possible. The questionnaire was accordi...
Article
A method based on Jöreskog's approach to the analysis of covariance structures is applied to the genotype-environment analysis of the covariation of four aspects of impulsiveness in male and female monozygotic and dizygotic twins. The data are consistent with a simple model which assumes additive gene action, random mating and environmental effects...
Article
A Nigerian sample of 329 men and 101 women was administered the Eysenck Personality Questionnaire under selection conditions; so was another sample of 246 Nigerian males under conditions of anonymity. All Ss in these groups were members of the armed forces. British groups of civilians and soldiers (N = 404 men and 544 women) were also administered...
Article
Results are reported of testing male and female university students (N 1957), male and female schoolchildren (N = 6116) and male and female psychotic inpatients (N = 420) in both Japan and England with the PEN Personality Inventory, which purports to measure the independent personality dimensions of Psychoticism (P), Extraversion (E), and Neurotici...
Article
2,070 male prisoners and 2,442 male controls were administered the Eysenck Personality Questionnaire, which gives scores on Psychoticism, Extraversion, Neuroticism, and Lie scales. The groups were subdivided into age groups, ranging from 16 to 69 yr. at the extremes. It was found that the Lie scale disclosed little dissimulation in either group. Sc...
Article
The new Eysenck Personality Questionnaire was administered to 441 male and 441 female Ss, 63 in each of 7 groups (normal, criminal, schizophrenic, endogenous depressive, personality disorder, anxiety state, and reactive depression). Means and SDs are reported for the groups, and a discriminant function analysis was performed to estimate the relativ...
Article
Four experiments are reported in which the effects of ordinary instructions on scores on various personality inventory scales and a Lie scale score are compared with scores under ‘honesty’ instructions, i.e. when subjects are explicitly warned about the presence of items which might enable detection of dissimulation. In the first experiment, random...
Article
A study is reported of 264 female prisoners, in which they were administered personality questionnaires purporting to measure psychoticism, neuroticism and extraversion. Various normal female control groups were also tested, and the results compared with questionnaire responses of male prisoners and male control groups. It was found that female pri...
Article
SYNOPSIS A study is reported of a random sample of 170 normal men and 192 normal women who were given a 110-item questionnaire incorporating items intended to measure personality variables P (psychoticism), N (neuroticism), E (extraversion), and L (a lie and dissimulation scale). Factor analysis of the intercorrelations between items disclosed a cl...
Article
Six hundred and six male trainee railmen and 518 criminals were administered personality inventories purporting to measure the personality dimensions of Psychoticism (P), Extra-version (E) and Neuroticism (N). Also administered was a Lie scale (L). Scale means and reliabilities are reported for the experimental and control groups, and proportions o...
Article
-Questionnaire scales for the measurement of psychoticism, neuroticism, extraversion and dissimulation ("Lie scale") were administered to 216 boys and 224 girls 11 and 12 yr. old; all 111 items of the questionnaire were intercorrelated and factor analyzed separately for the two sexes. Four main factors emerged, as expected, with the 3 personality f...
Article
8 sex-attitude items were found to have appreciable loadings on a psychoticism factor and a lie factor for random population samples of 228 men and 263 women. These factors were independent of each other, and of extraversion and neuroticism. The bearing of these results on the problem of dissimulation (“faking good”) on the sex attitude items is di...
Article
. 390 children were given an intelligence test and a 100-item personality inventory purporting to measure E, N and the tendency to put themselves in the best light (lie scale). Factor analysis of the intercorrelations between items gave rise to three clearly defined independent factors identified as E, N and L. Intelligence correlated significantly...
Article
A scale was constructed to measure the personality dimensions, P (psychoticism), E (extroversion), N (neuroticism) in addition to an L scale for the measurement of dissimulation (lying). These scales were applied to more than 3,000 7-15 yr. old Ss. Results indicate that boys scored much higher on P than did girls as well as being more extroverted a...
Article
Drawings of a person made by 50 girls and 54 boys were rated on the Harris Qualitative Scale by four independent raters; reliabilities were in the neighbourhood of .8. Ratings were correlated with the Extraversion scores on the Junior E.P.I.; extraverted children produced better drawings. Intelligence was correlated both with quality of drawing and...
Article
An inventory containing 20 extraversion (E), 20 neuroticism (N) and 20 psychoticism (P) questions was administered to 1423 adult males, and 968 females, as well as to 1400 students of both sexes and to 327 housewives. Analysis by age, sex and social class showed that young people are high on E, high on N and high on P; that males are high on E, hig...
Article
An investigation is reported into the measurement of the personality dimension P (psychoticism), which has emerged from factorial and other empirical studies as a third dimension additional to E (extraversion) and N (neuroticism.) Large groups of normal men and women, and of male and female students, were administered an inventory containing 106 po...
Article
50 men and 50 women were administered the EPI and tested with respect to the increment in salivation produced by putting 4 drops of pure lemon juice on the tongue for 20 sec. It was found that in both groups introversion correlated approximately 0.7 with increase in salivation; there was no correlation with neuroticism. When a commercial product wa...
Article
6 introverts and 6 extraverts were tested with respect to the increment of salivary activity as a consequence of (a) putting 4 drops of lemon juice on their tongues and (b) having them swallow 4 drops of lemon juice. Under condition (a) introverts salivated significantly more than extraverts; under condition (b) extraverts salivated significantly m...
Article
. The junior form of the Eysenck Personality Inventory, measuring extraversion, neuroticism and tendency to lie, was administered to two groups of children totalling 575, both boys and girls, ranging in age from 11–15. Children in the control group were tested and retested under identical instructions; children in the experimental group were tested...
Article
. A brief description is given in this paper of the Junior E.P.I.: a questionnaire for use with children from the ages of 7 to 16. The questionnaire was developed by extensive factor analyses carried out separately for the various age groups considered, and detailed norms are available for boys and girls separately at each age. The questionnaire co...
Article
Extraversion and neuroticism questionnaires were studied from the point of view of the existence of response sets, by correlating scores on congruent and incongruent sets of questions. It was found that congruent sets correlated higher than incongruent sets, but the differences were slight on the whole and suggested that response set is not a power...
Article
A questionnaire measuring extraversion, neuroticism and tendency to lie was administered to 10 separate groups of Ss under ordinary conditions and later under instruction to “fake good”. The results suggested that intermediate degrees of extraversion and low degrees of neuroticism are generally preferred; that “desirability response set” played som...
Article
Five hundred subjects filled in two neuroticism questionnaires and four extraversion questionnaires; the former were all keyed for “Yes” responses, whereas two of the latter were keyed for “Yes” and two for “No” responses. An analysis of the relationships between these different questionnaires substantiate the hypothesis of the existence of respons...
Article
A study is reported of the validity of the Maudsley Personality Inventory, using the method of nominated groups. Judges nominated persons of their acquaintance whose behaviour showed them to be outstandingly high or low on wither one or both of the dimensions of extraversion-introversion and stability-neuroticism. Questionnaire answers of these sub...
Article
A factor analytic study was made of the response of a quota sample of 1,000 English subjects on a five-part 29-item questionnaire. Included in the factor analysis were also the class (middle versus working class) and sex of respondents. Five factors were found, accounting for some 63 per cent of the variance. Three of these were confidently identif...
Article
Full-text available
This paper outlines the background, rationale, and strategy that encompasses the 22 years of Eysenck investigations into the cross-cultural comparison of the four personality "superfactors" measured by the Eysenck Personality Questionnaire. This effort has not taken place without encountering criticism of both its methodology and psychological mean...

Citations

... It is mainly used to measure the mental health status of individuals. Other scales for evaluating mental health status include the Self-Rating Anxiety Scale [9], Self-Rating Depression Scale [10], and Eysenck Personality Questionnaire [11]. The above scales focus only on the measurement of mental health and lack the measurement of the individual's physical health. ...
... In the Northern Finland 1966 Birth Cohort, which followed patients for almost 20 years, those who were off antipsychotics were more often in remission, and no differences in remission rates between treatment groups were found 34,35 . Similarly, the OPUS cohort in Denmark found that, among the 90% of the individuals who did not have sustained remission 10 years after their first episode, more were on than off antipsychotics 36,37 . Nevertheless, in those nonrandomized, uncontrolled studies, adherence levels to antipsychotic treatment are unknown, and most importantly, there is a high risk of confounding by indication and reverse causation, in that greater illness severity could be the cause of continued antipsychotic treatment, rather than being the effect. ...
... Neuroticism has been variously defined as emotional instability, negative outlook, difficulties in adjustment, poor self-control, a tendency to complain about life, and an inability to cope with psychological stress [19]. This construct, which is no longer in worldwide use, is traditionally measured by the Eysenck Personality test [20]. Pregnant women with a tendency for neuroticism have a higher risk of antenatal depression. ...
... The EPQ Lie scale is a scale measuring a personality characteristic of "trying to look better than actually is" in front of others. The Lie scale is considered to be more than merely a measure of dissimulation but rather reflects some stable personality dimension in its own right (Furnham et al., 2008). Corruption is deceptive behaviour in which the rules and the principle of fairness are violated. ...
... Extroversion is one's personality that can be explained through terms of sociability, activity, and dominance (Saklofske et al., 2012). An extrovert prefers socialising with others and have a huge network (Lee & Tsang, 2001;Zhao et al., 2010). ...
... Mulder et al. (2013) reported that EPI Neuroticism scores were significantly associated with lifetime PTSD diagnoses. Perrin et al. (2014) administered a French translation of the Eysenck Personality Questionnaire (EPQ; Eysenck et al., 1980) and a French translation of the DSM-IV ( APA, 1994) Schedule for Affective Disorders and Schizophrenia-Lifetime and Anxiety Disorder PTSD module (SADS-LA; Endicott & Spitzer, 1978) to 3691 Swiss adults. Perrin et al. (2014) observed that EPQ Neuroticism scores were significantly associated with PTSD diagnoses. ...
... Desde esta perspectiva, parece razonable suponer que las actitudes hacia las normas viales tenderian a ser mas negativas en las personas con tendencias antisociales. Para contrastar esta hipótesis en la escala ANV, se analizaron las diferencias de dos colectivos de sujetos con valores extremos en la escala de <<conducta antisocial)) del EPQ-J (Eysenck y Eysenck, 1969). En consecuencia, dividimos la muestra de alumnos en dos grupos en función del percentil en el que se situaban en esta variable. ...