Though group interventions are widely used in community-based and clinical settings, there are few brief instruments for assessing the group environment. Two studies on the development of a brief measure to assess intervention group environments are described, and psychometric properties of the new scale are presented. The new measure is based on Moos' (1994) Group Environment Scale (GES). Participants in the studies were from two independent randomized controlled clinical trials (RCTs) of group interventions (combined N = 334). In Study 1 (N = 139), the factor content of the original 90-item GES was examined. The scale was shortened, the response format was changed, and items were adapted and added to in an effort to increase applicability to community-based and clinical intervention groups. In Study 2 (N = 195), the new scale was evaluated, the factor solution obtained in Study 1 was cross-validated, and subsequently the length of the scale was shortened again. The final scale contains 25 items with three subscales. Reliability and validity of the new scale was examined. Finally, the research and practice implications of the scale are discussed.Group interventions have been proposed as perhaps the most promising psychosocial treatment modality for persons receiving care in clinical and community-based health care settings (Simonton & Sherman, 2000), and interest in and practice of group interventions is growing among researchers and practitioners (Sherman et al., 2004). For the purposes of this study, group interventions refer to the broad range of behavioral and mental health interventions that are delivered within the group environment. Types of groups that fall under the umbrella of a "group intervention" include psychotherapeutic groups, educational groups, support groups, skills-building groups, and any combination of the four. Using this perspective, group
NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript interventions may take place as a part of a research study examining the effectiveness of an intervention (e.g., a randomized controlled clinical trial), or they can exist as a part of services provided to clients in public or private health service organizations or community-based organizations. Likewise, intervention groups refer to groups that are unstructured and conducted for indefinite periods of time, as well as those that are structured and delivered for a predetermined number of sessions to a fixed number of participants.There are many advantages of using the group environment to deliver an intervention. These advantages include: (a) the development of a sense of universality, cohesion, and social support among group members; (b) the opportunity for modeling and social learning from other group members, and (c) the positive experience of sharing with and helping others (Burlingame, MacKenzie, & Strauss, 2003;Hyde, Appleby, Weiss, Bailey & Morgan, 2005;Yalom, 1985). Additionally, research suggests that participants often view group interventions as less stigmatiz...