Original article:

High-K Strategy Scale: A measure of the High-K independent criterion of fitness

Evolutionary Psychology 4: 394-405 Cezar Giosan, Department of Psychiatry, Weill Medical College of Cornell University, New York, NY 10021 E-mail: cezar@giosan.com


The present study aimed at testing whether factors documented in the literature as being indicators of a high-K reproductive strategy have effects on fitness in extant humans. A 26-item High-K Strategy Scale comprising these factors was developed and tested on 250 respondents. Items tapping into health and attractiveness, upward mobility, social capital and risks consideration, were included in the scale. As expected, the scale showed a significant correlation with perceived offspring quality and a weak, but significant association with actual number of children. The scale had a high reliability coefficient (Cronbach’s Alpha = .92). Expected correlations were found between the scale and number of medical diagnoses, education, perceived social support, and number of previous marriages, strengthening the scale’s construct validity. Implications of the results are discussed.


Fitness, adaptedness, high-K, life history theory, r/K, number of children, offspring quality

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Evolutionary Psychology - An open access peer-reviewed journal - ISSN 1474-7049 © Ian Pitchford and Robert M. Young; individual articles © the author(s)

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