Replicated and extended aspects of determinations of reliability and validi
ty for the State Version of the Youth-Depression Adjective Check List. Stud
ents from Grades 9 through 12 (61 girls and 41 boys) completed the State ve
rsion and the Adolescent Activities Checklist on each of 12 consecutive day
s and completed the Trait version, the Reynolds Adolescent Depression Scale
, the Multiple Affect Adjective Check List-Revised Grade 6, and the Adolesc
ent Activities Checklist at the beginning rind the end of the study. Good r
eliability and validity of the State version were confirmed and extended, a
nd preliminary information on characteristics of the Trait version of the Y
outh-Depression Adjective Check List also was presented. The State version
seems suitable for use in research with adolescents and preadolescents. Mor
e study of the Trait Version is recommended.