Broad Autism Phenotype Questionnaire
The BAPQ, is a self-report questionnaire for adults, evaluating features of the broad autism phenotype. Participants are asked to rate 36 items using a 6 point scale, with responses ranging from very rarely, to very often (see Table 1 for descriptive information). In addition to a total score, the BAPQ provides scores for three subscales that parallel deficits and behaviors common in ASD (i.e., aloof subscale, pragmatic language subscale, rigidity subscale). The current analysis focuses on the BAPQ aloof subscale as it is conceptually related to joint attention. The aloof subscale is intended to tap into ‘‘a lack of interest in or enjoyment of social interaction’’ and items include ‘‘I would rather talk to people to get information than to socialize.’’ Psychometric properties of the BAPQ reveal excellent internal consistency with Cronbach’s a scores ranging from 0.80 to 0.95. Further, a recent study comparing the BAPQ, social responsiveness scale-A, and autism spectrum quotient found that theBAPQ was the best of the three measures at quantifying the BAP in terms of internal consistency, criterion validity, and incremental validity in a large population of non-clinical adults.