Measuring the Success of the Holland Hexagon

J. L. Holland's approach to personality (and careers that aresuitable for different personality types) involves scoring peopleon six personality measures and intercorrelating the six scores;there is a hypothesis about the relative sizes of the fifteencorrelations. In the present paper, some statistics are proposed fordescribing how well this hypothesis (and three variants of it) matches an observed correlation matrix. These statistics are analogousto a correlation coefficient. A variables-in-common model isgiven that justifies the most parsimonious of the hypotheses considered.