AbstractContributions from the research include: (1) the development of a validated scale to measure the perception of source credibility in personal selling; (2) understanding the underlying dimensions of the perception of source credibility in the selling context; (3) identification of the Sociability factor for the first time in source credibility research; and (4) recognition of the credibility implications associated with salesperson's title.
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Simpson et al. (1981) studied this question.