The Behavioral Inhibition Questionnaire (BIQ) is a parent-rating scale for measuring temperamental characteristics referring to shyness, fearfulness, and withdrawal in young, preschool children. The present study evaluated the psychometric properties of the BIQ in a Dutch community sample of children with a broad age range. For this purpose,the reliability and validity of the BIQ was evaluated in three age groups: 4-7-year-olds,8-11-year-olds, and 12-15-year-olds. The results indicated that the internal consistency of most BIQ scales was satisfactory in all three age groups. Principal component analysis of the BIQ yielded a six-factor model that was largely in keeping with the hypothesized structure consisting of the social and non-social components of behavioral inhibition.Confirmatory factor analysis indicated that this model provided a reasonable fit for the data. Further, support for the validity of the measure was obtained in all age groups. That is, BIQ scores were positively correlated with a wide range of anxiety symptoms, although the most substantial links were found for symptoms of social anxiety. Finally, a self-report version of the BIQ, which was administered to children aged 9 years and above, was found to possess good internal consistency and adequate parent-child agreement. Altogether, the results of this study indicate that suggests that the BIQ might be a reliable and valid measure for assessing behavioral inhibition not only in preschoolers but also in older children and adolescents.

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Keywords Netherlands, adolescent, age, article, child, control, evaluation, factorial analysis, fear, female, hospitalization, human, inhibition (psychology), male, parent, personality, personality test, psychological aspect, psychometry, questionnaire, reproducibility, risk factor, self concept, social behavior, standard, statistics
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Journal Child Psychiatry & Human Development
Broeren, S.M.L, & Muris, P.E.H.M. (2010). A psychometric evaluation of the behavioral inhibition questionnaire in a non-clinical sample of Dutch children and adolescents.. Child Psychiatry & Human Development, 41(2), 214–229. doi:10.1007/s10578-009-0162-9