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Effects of compression on human performance and affective states

Baddeley (1966) explored the effects of reduced body temperature on time-estimation in scuba-divers. H is results supported Hoagland's chemical-clock hypothesis the higher the body temperature, the quicker the chemical reaction, the faster the internal clock and the faster the speed of counting up to 60 (Hoagland, 1933). The rate of counting was unaffected by pre-dive anxiety. On the basis of the chemical-clock model it is here hypothesised that perception of time is unaffected by compression in a dry-dive.