Fig. 1From: Social-emotional problems among Swedish three-year-olds: an Item Response Theory analysis of the Ages and Stages Questionnaires: Social-EmotionalThe probability of endorsing the five items that had the lowest and highest threshold parameter on the latent trait, respectively, using the first edition of the Ages and Stages Questionnaires: Social-Emotional (ASQ:SE) for 36-month intervalBack to article page