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Reliability and validity data are reported for a questionnaire measure of individual differences in achieving tendency which is an expanded and improved version of Mehrabian's (1969) scales. The final 38-item questionnaire is based on a general and large pool of items tapping most aspects of achieving tendency identified in the literature and in other measures of achievement. Balanced for response bias, the scale has high internal consistency as evidenced by a coefficient of .91 obtained from use of Kuder-Richardson formula (20). The measure is also independent of social desirability as it correlated .02 with the Crowne and Marlowe (1960) social desirability scale. Correlations with the Jackson (1967) and Mehrabian (1969) measures of achieving tendency were statistically significant and high.
Mehrabian et al. (Sat,) studied this question.
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