People often say that their performance on certain tasks differs throughout the day, and explanations for these fluctuations in mental abilities have focussed on factors such as changes in body temperature or diet. New research by psychologists suggests however that alterations in the hormone testosterone may be responsible for these mental changes.
Dr Daryl OConnor and colleagues from the University of Leeds present their findings today, Saturday 17 April 2004, at the British Psychological Society’s Annual Conference at Imperial College, London.
They asked males and females to carry out various verbal and spatial tasks between 8am and10am when testosterone levels are high; and between 3pm and 5pm when testosterone levels have declined. Saliva samples were collected before and after both sessions to measure actual levels of the hormone.
Alison Croft | alfa
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