A recent scientific review challenges the common notion linking testosterone to risk-taking behavior in humans, and shows that this behavior is more complex than previously thought.
A large meta-analysis of dozens of studies and more than 17,000 participants showed no reliable link between testosterone levels and an individual's propensity to make risky decisions. The findings suggest that risk-taking behavior cannot be explained by a single hormonal factor, but rather by a complex interplay of biological, psychological, and social factors.
Some previous theories had suggested that higher testosterone levels, the primary male hormone responsible for a number of physical changes during puberty, might make men less risk-averse than women. However, scientific evidence remained conflicting, with some studies supporting this link while others refuted it or showed the opposite.
To test this hypothesis, researchers compiled the results of 52 studies involving 17,340 people, using various methods to measure testosterone levels, such as blood and saliva tests, and sometimes direct administration of the hormone in experiments. Risk-taking behavior was also measured through multiple tests, including gambling tasks, lottery games, and personality questionnaires.
After analyzing the data using advanced statistical methods that accounted for the varying study designs, the researchers found no clear relationship between testosterone and risk-taking behavior in most cases. Only a slight correlation was observed in some trials related to lottery games, while no relationship was found in other, more diverse measures.
The results also showed that differences in risk-taking propensity between men and women cannot be explained solely by testosterone levels, as its effect was not stronger in men. Even studies that used indirect indicators of testosterone, such as finger length ratios as a marker of early prenatal testosterone exposure, did not provide conclusive evidence of a strong relationship.
The study concludes that risk-taking behavior is not determined solely by hormones, but rather is shaped by a complex system that includes psychological state, social context, and the nature of the situation itself. The researchers indicate that understanding this behavior requires broader and more precise studies in the future before definitive conclusions can be drawn.
The results were published in Neuroscience and Behavioral Reviews.
