To investigate the relationship between perceived self-competence and other variables affecting the successful adjustment and achievement of students, 400 fourth through seventh graders were surveyed using the Perceived Competence Scale for Children (PCSC), the Revised Children's Manifest Anxiety Scale (RCMAS), which consists of two scales, Anxiety and Lie, and four sociometric questions, using a roster-and-rating technique. Recent results of the Iowa Tests of Basic Skills (ITBS) were obtained for each student. Results indicated strong, positive relationships between the Cognitive PCSC scale and ITBS scores. PCSC scales and sociometric ratings were found to be significantly related. Multiple regression analyses revealed the RCMAS Anxiety scale to best predict each of the PCSC scales. ITBS results were best predicted by sociometric choices of study partners. Sex and race differences were found on many of the variables. The results of this investigation support the notion of the need for multi-faceted studies of achievement and student adjustment. (Author/LLL)