Factor analysis of the Autism Spectrum Screening Questionnaire

Centre for Child and Adolescent Mental Health, University of Bergen, Norway.
Autism (Impact Factor: 3.5). 02/2008; 12(1):99-112. DOI: 10.1177/1362361307085268
Source: PubMed


The present study investigated the factor structure of parent and teacher Autism Spectrum Screening Questionnaire (ASSQ) in a population of 7-9 years old children. For validation purposes, factors derived were correlated with results on the Strengths and Difficulties Questionnaire (SDQ). A three-factor solution was identified on both parent and teacher ASSQ. Most of the variance was explained by one factor including measures of social function, validated by a high correlation with the SDQ peer problems scale. The second factor included measures of autism-associated problems. The items allocated to the third factor were more specific for a cognitive style typically found in high-functioning individuals with autism/Asperger syndrome. This factor did not correlate highly with any of the SDQ subscales. The results indicated that the screening efficiency of ASSQ could be increased by closer examination of the individual profile of factor scores.

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Available from: Astri J Lundervold, Mar 06, 2015
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    • "The BCS validation study showed that more than 90% of children who received an ASD diagnosis according to the Diagnostic Interview for Social and Communication Disorders (DISCO), were also rated above the 98th percentile on the ASSQ by parents and/or teachers, corresponding to a sensitivity of 0.91 and a specificity of 0.86 (Posserud et al., 2009). Previous studies from the BCS have shown that the ASSQ has good internal consistency (Cronbach's alpha = 0.86) (Posserud et al., 2006) and a stable three-factor structure with factors labelled Social difficulties (11 items), Motor/tics/OCD (7 items), and Autistic style (9 items) (Posserud et al., 2008). As described by Posserud et al. (2008), the autistic style factor includes items that characterize a verbal language and social-cognitive style often seen in high-functioning individuals with ASD. "
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    ABSTRACT: Level and characteristics of intellectual function (IQ) have been associated with symptom presentation in children with autism spectrum disorder. The present study examined associations between IQ and autistic features in a sample of school aged boys and girls selected from a population-based cohort. The study included detailed examinations of 325 children aged 8–12 years, selected from the sample of the Bergen Child Study. IQ was assessed using the third version of the Wechsler Intelligence Scale for Children (WISC-III) and autistic features by parent reports on the Autism Spectrum Screening Questionnaire (ASSQ). Boys obtained higher ASSQ scores than girls. Gender and FSIQ had main effects on ASSQ scores, with the ASSQ scores showing a gradual decline with higher FSIQ for both genders. Discrepancies between verbal and performance IQ were relatively unrelated to ASSQ scores. The findings emphasize the importance of conducting careful assessments of children before reaching conclusions about cognitive function and autistic features.
    Research in Autism Spectrum Disorders 03/2014; 8(3):266–274. DOI:10.1016/j.rasd.2013.12.001 · 2.96 Impact Factor
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    • "It was therefore excluded from the teacher questionnaire in the present study. For more details regarding this factor analysis, see Posserud et al. [30]. "
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    ABSTRACT: Background The aims of the present study were to assess symptoms associated with an autism spectrum disorder (ASD) in children with neurological disorders as reported by parents and teachers on the Autism Spectrum Screening Questionnaire (ASSQ), as well as the level of agreement between informants for each child. Methods The ASSQ was completed by parents and teachers of the 5781 children (11–13 years) who participated in the second wave of the Bergen Child Study (BCS), an on-going longitudinal population-based study. Out of these children, 496 were reported to have a chronic illness, including 99 whom had a neurological disorder. The neurological disorder group included children both with and without intellectual disabilities. Results Children with neurological disorders obtained significantly higher parent and teacher reported ASSQ scores than did non-chronically ill children and those with other chronic illnesses (p<.01; ES = .50-1.01), and 14.1% were screened above the positive cutoff score for ASD according to their combined parent and teacher ASSQ scores. Parent/teacher agreement over ASSQ scores for children with neurological disorders was moderate to high for the total score and for three sub scores generated from a factor analysis, and low to moderate for single items. Conclusions The ASSQ identifies a high rate of ASD symptoms in children with neurological disorders, and a large number of children screened in the positive range for ASD. Although a firm conclusion awaits further clinical studies, the present results suggest that health care professionals should be aware of potential ASD related problems in children with neurological disorders, and should consider inclusion of the ASSQ or similar screening instruments as part of their routine assessment of this group of children.
    Child and Adolescent Psychiatry and Mental Health 11/2012; 6(1):34. DOI:10.1186/1753-2000-6-34
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    • "Factor analysis yielded 3 factors: Social difficulties, Motor/Tics/OCD, and Autistic Style (Posserud, et al., 2008). Psychometric properties of the ASSQ have been examined in a variety of settings and samples (Ehlers & Gillberg, 1993; Ehlers, et al., 1999; Posserud, et al., 2006; Posserud, Lundervold, & Gillberg, 2009; Posserud, et al., 2008). The SRS (formerly Social "
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    ABSTRACT: Although gender disparity in ASD has been long documented, research addressing gender related to core ASD symptomatology (e.g., domains, severity, breadth, etc.) is scant. The present research examined gender differences in ASD symptomatology in three populations: infants and toddlers at risk for developmental disability, children and adolescents, and adults with intellectual disability (ID). No significant gender differences in ASD symptoms were found in the infant/toddler or child/adolescent populations. In the adult population, in participants with ID alone, females had higher endorsements of social (i.e., participation in social games, sports, and activities; interest in other’s side of the conversation; and imitation) and communication (i.e., interest in other’s side of the conversation and reading body language) impairments compared to males. This study has considerable implications in both the clinical and research realms as for diagnostic and assessment validity and prioritized treatment needs for females with ASD, as well as stimulating a future research agenda (i.e., considerations such as cognitive ability, comorbidity, course and age, qualitative symptom differences, social/environmental gender biases) in this area. KeywordsAutism spectrum symptoms–Gender differences–Intellectual disability–Lifespan
    Journal of Developmental and Physical Disabilities 10/2011; 23(5):399-420. DOI:10.1007/s10882-011-9235-3 · 1.56 Impact Factor
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