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C.

Preparation and pretest of the questionnaire

The research team prepared and then revised the questionnaire over a period of six months.

In June, 1960, an early draft of the questionnaire, along with a cover letter, was mailed to fourteen companies in the state of Washington.

Several days after the companies had received the questionnaire, members of the research team contacted the presidents of eleven of these companies in person or by phone to discuss any ambiguities or difficulties the addressees might have experienced in completing the questionnaire.

This test resulted in further revisions of the questionnaire.