Abstract
The dual-hormone hypothesis suggests that testosterone is positively associated with status-seeking tendencies such as aggression and dominance, particularly in individuals with low levels of cortisol. Although recent research supports the dual-hormone hypothesis, its boundary conditions under which the dual-hormone interaction is likely to emerge are not clearly understood. In the present study (N = 153), the dual-hormone hypothesis was empirically tested in the context of an economic game that included a decision whether to dominate another individual. We also examined whether the dual-hormone interaction is more likely to be found in individuals who are chronically prone to dominance tendencies. Results revealed a significant testosterone × cortisol interaction in line with the dual-hormone hypothesis. Additionally, the testosterone × cortisol interaction was only significant in individuals with a high level of chronic dominance. Overall, the present work suggests that chronic personality tendencies should be taken into account in order to explore (the boundary conditions) of hormone-behavior associations. Aggr. Behav. 43:85-92, 2017. © 2016 Wiley Periodicals, Inc.
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