The purpose of this study was to determine if team cohesion could be enhanced for 9th grade female basketball teams with the implementation of a 14-week intervention program. The intervention program was designed from cohesion building strategies proposed in the literature with the help of three coaches and a leading sport psychologist in the field of cohesion. 41 ninth grade female basketball players belonging to four teams participated in the study. The Group Environment Questionnaire was used to measure cohesion. It was administered on the third week of the season and again at the end. The data were analyzed using both the individual and the team as the unit of analysis. The findings varied according to which unit of analysis was used. When the team was used, no posttest differences were found, however, the effect sizes suggested that the intervention was effective for the task subscales of the GEQ. A lack of statistical power for the team analysis greatly reduced the probability of finding that the meaningful differences were statistically significant. When the individual was used, the intervention was found to be statistically detrimental for the task subscales. The effect sizes supported this finding. The qualitative data that was collected suggested that the coaches believed the intervention had practical utility, and was effective. While this study did not empirically show that the intervention was effective, it did demonstrate that the intervention is practical enough to implement. Furthermore, the qualitative data and the effect sizes for the team analysis provide some evidence that the intervention may have been effective for the task dimension of team cohesion. Therefore this study produced an intervention that can be used as a starting point for future cohesion building investigations. / Graduation date: 1997