An Exploratory Model of Interpersonal Cohesiveness in New Product Development Teams

There has been a heavy emphasis in new product development (NPD) research on intrateam issues such as communication, trust, and conflict management. Interpersonal cohesiveness, however, has received scant attention. In addition, there are conflicting findings regarding the effects of close-knit teams, which seem to have a beneficial effect up to a point, after which the tight bond becomes a detriment. This paper addresses these issues by introducing an exploratory model of interpersonal cohesiveness -> NPD performance that includes antecedents, consequences, and moderating factors. Antecedents of interpersonal cohesiveness include clan culture, formalization, integration, and political dominance of one department, while consequences are groupthink, superordinate identity, and, ultimately, external/internal new product (NP) performance. The relationships among interpersonal cohesiveness, groupthink, and superordinate identity appear to be influenced by two moderating factors: team norms and goal support. Additionally, product type is identified as a moderator on the effects of both groupthink and superordinate identity on external NP performance. The model is built from two sources: a synthesis of the literature in small group dynamics and NPD, and qualitative research conducted across 12 NPD teams. Individual team leaders were interviewed first, followed by interviews with two additional members on each team, for a total of 36 interviews. In keeping with the goals of qualitative research, the interviews and analysis were used to identify and define aspects of interpersonal cohesiveness rather than to test a preconceived model. Representation of different industries and product types was sought intentionally, and variance in NP innovativeness as well as in NP market success/profitability became key criteria in sample selection. The exploratory model and propositions developed in this study provide a framework for understanding the role of interpersonal cohesiveness in NPD teams and its direct and indirect effects on NP performance. Although a significant amount of research on cohesiveness has been conducted in previous studies of small groups, the narrow laboratory settings of that research have limited the generalizability of the findings. This study therefore serves as a useful starting point for future theory development involving interpersonal cohesiveness in NPD. It also provides a guide for managers in dealing with team cohesiveness.