This study measures and describes characteristics of adolescents' psychological functioning which, at more intense levels, may become developmental or psychopatological disorders. The Millon Adolescent Clinical Inventory (MACI; Millon, 1993) was administered to a group of 561 Chilean adolescents, from 14 to 18 years old, non-consulting and with normal school attainment. In this group, increased scores on the MACI scales identified 150 at-risk adolescents who dis not present evident emotional or behavioral problems. In this group the score's clinical significance were assessed by means of a cluster analysis that found three types of profiles on the basis of the MACI scores.