Abstract
Groups of about 35 subjects were given Neutral, Low and High motivating instructions before completing the Shortened Form of Betts' Questionnaire upon Mental Imagery. The results for imaging scores in all seven sensory modalities tapped by this questionnaire indicated that the instructions significantly influenced subjects' responses. The data were interpreted as supporting the hypothesis that perceived desirability of claiming intense images contaminates responses on the Betts' QMI.

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