Level IV, retrospective case series.

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The correlations of scores on the Campbell-Holland Interest Scale for American and New Zealand psychology students were compared, and the factor structure was shown to be similar in the two samples.Holland (1966) has proposed that scores on vocational interest inventories are expressions of a person's personality. He postulated that people can be classified into six personality types, which he called realistic, intellectual, artistic, social, enterprising, and conventional. These personality types were formulated from his experience in vocational guidance counseling and are supported by the analysis of interests and personality traits in which Guilford, Christensen, Bond, and Sutton (1954) found six factors: mechanical, scientific, aesthetic, social welfare, business, and clerical. The present article studies the stability of the structure underlying Holland's classification in order to examine its suitability for use in another country. It compares the correlation matrix of an American sample with that of a similar, though not identical, sample of New Zealand students.

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