In the literature on questionnaire construction, conflicting conclusions have been reached concerning the possible effects of presenting items within labeled groupings and/or in a different order on the conclusions drawn from a study. For example, Sudman and Bradburn (1974) suggest that, without additional research, recommendations cannot be made regarding the possible influence of item order and grouping, but Kidder (1981) suggests that different forms should be administered and Schriesheim (1981b) suggests that items should be ordered randomly. One apparent reason for the conflicting judgments is that relatively few studies have been conducted which could serve as bases for recommendations. A second reason is that available findings generally do not support one another. For example, Krant, Wolfson and Rothenberg (1975) concluded that item location on a questionnaire could affect the average response, but Clancy and Wachsler (1971) concluded that item location was of only minor importance. Also, Metzner and Mann (1953) concluded that item grouping did not affect the item correlations, but Schriesheim (198 la, 1981b) and Schriesheim and DeNisi (1980) concluded that grouping items into logical categories instead of randomly ordering the items impaired the magnitude of the correlations indicative of the convergent and divergent validities and resulted in a leniency effect on the item means. Another example is Schriesheim and DeNisi (1980) who observed that item order (and grouping) affected factor analytic results, but Kane (1971) concluded that different orders for semantic differential items did not affect the factor compositions. Because only a limited number of studies have been conducted, one might view the mixed findings as resulting from some investigators having observed either a unique situation or a chance result. However, the methodologies of the reported studies differed enough that it might not even be meaningful to compare the results from the studies, that is, the differences in the methodologies might be an alternative explanation for the mixed findings. One particular feature about the methodologies used to date is that no study employed a sufficient number of questionnaire forms to examine independently the effects of grouping and order on the item means and correlations. For example, in the Schriesheim studies, only two forms were used, one on which the items were ungrouped and randomly ordered and a second on which items were grouped according to logical classifications and appeared in a different order. Thus, order and grouping effects were confounded and it probably is not meaningful to compare the Schriesheim findings to those of studies that investigated only either a grouping or an order effect. By using three different forms of a questionnaire in this study, it was possible to examine the effects of both order and grouping in separate analyses. The criteria for assessing the effects were item means, item correlations, and factors underlying the