Test-retest reliability and validity of a frustration paradigm and irritability measures

Data on the reliability and validity of assessments for irritability, particularly behavioral paradigms, are limited. This study examined the test-retest reliability and validity of a frustration paradigm (the Affective Posner 2 task) and two irritability measures [the Affective Reactivity Index (ARI) and Child Behavior Checklist (CBCL) irritability]. Participants were 109 youth from a general population sample of twins (aged 9–14 years)....