R. Vanwhitlock et al., FACTOR STRUCTURE OF THE STATE AND TRAIT VERSIONS OF THE DEPRESSION ADJECTIVE CHECK LISTS, Journal of clinical psychology, 51(5), 1995, pp. 614-625
The factor structure of the state and trait versions of the Depression
Adjective Check Lists (DACL) was assessed. Results support the existe
nce of two underlying factors, ''negative mood'' and ''positive mood,'
' which are robust across sex and age groups (elderly, young adults, a
nd adolescents) and across referred as well as nonreferred populations
.