Decision performance and diversity structure Sawyer Houlette Yeagley 2005

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The Group Identification scale was nine items with a seven-point Likert scale (Hinkle, Taylor, & Fox-Cardamone, 1989)(e.g. "I see myself as an important part of this group."). Opportunity to Influence consisted of six questions scored on a nine-point Likert scale measured one's ability to influence the group decision (Johnson & Johnson, 1994) (e.g., "How understood and listened to did you feel in your group?"). The group decision Process Effectiveness scale (Reagan & Rohrbaugh, 1990) consisted of 11 items, scored on a seven-point Likert scale with three adapted to apply to our task (e.g., "The group considered all relevant information in making its decision").