Abstract This study evaluated the psychometric properties of the Questionnaire about Interpersonal Difficulties for Adolescents (QIDA) in a sample of Portuguese adolescents. Exploratory and confirmatory factor analyses supported a four-factor structure of the QIDA in the Portuguese sample: Assertiveness, Heterosexual Relationships, Public Speaking, and Family and Friends Relationships. Internal consistency (α = 0.91) and test-retest reliability (r = 0.84) were appropriate. The results revealed a clear and predictable pattern of relationships between the QIDA and the Social Anxiety Scale for Adolescents, the School Anxiety Questionnaire and the International Personality Item Pool.
por Cándido J. Inglés, João Castanheira, Filipe Ribeiro e José M. García-Fernández,
