The present study examined whether cognitive process-related social skills, which include the ability to decode or read the intention of another person’s behavior, and emotional control or the ability to maintain the emotions that occur in interpersonal social situations, have a moderating effect on the relationship between depression in high school students and their behaviorally oriented social skills. A hierarchical regression analysis, using data from questionnaires completed by 184 first-year high school students in Japan (10th grade), revealed that the students with high assertiveness skills in the low emotional control ability group had increased levels of depression. Furthermore, for the students with low decoding ability, higher initiating relationship skills were associated with a decrease in the level of depression, and for the students with high decoding ability, lower maintaining relationship skills were associated with an increase in the level of depression. These results suggest that high school students might benefit from possessing not only assertiveness skills but also emotional control skills, and that the depression-reducing effect of behavior skills among students with high decoding ability might diminish with increasing interpersonal sensitivity.
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