Endogenous testosterone levels are associated with assessments of unfavourable health information.

The purpose of this study was to investigate whether participants' assessments of unfavourable health information are associated with individual differences in basal testosterone. Testosterone has previously been related to assessments of threat in social and other domains. 52 undergraduate males were tested for a minor, fictitious medical condition thioamine acetylase deficiency ('TAA deficiency') in a paradigm that was developed to examine the thoughts and behaviours of individuals who have just received unfavourable medical news.

Testosterone is positively associated with risk taking in the Iowa Gambling Task.

The association between testosterone and economic risk is not well-understood and is understudied. The present study aimed to further characterize what if any relationship testosterone has with risky economic decisions. To do so, 154 participants (78 men) completed the Iowa Gambling Task (IGT) (Bechara et al.

Salivary testosterone, cortisol, and progesterone: two-week stability, interhormone correlations, and effects of time of day, menstrual cycle, and oral contraceptive use on steroid hormone levels.

With salivary assessment of steroid hormones increasing, more work is needed to address fundamental properties of steroid hormone levels in humans. Using a test-retest design and radioimmunoassay assessment of salivary steroids, we tested the reliability of testosterone, cortisol, and progesterone levels across two weeks, as well as the effects of oral contraceptives, menstrual cycle phase, and time of day on steroid hormone levels. Testosterone and cortisol were found to be highly reliable in both sexes.