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Arctic cognition: a study of cognitive performance in summer and winter at 69°N

✍ Scribed by Tim Brennen; Monica Martinussen; Bernt Ole Hansen; Odin Hjemdal

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
159 KB
Volume
13
Category
Article
ISSN
0888-4080

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✦ Synopsis

Evidence has accumulated over the past 15 years that aect in humans is cyclical. In winter there is a tendency to depression, with remission in summer, and this eect is stronger at higher latitudes. In order to determine whether human cognition is similarly rhythmical, this study investigated the cognitive processes of 100 participants living at 698N. Participants were tested in summer and winter on a range of cognitive tasks, including verbal memory, attention and simple reaction time tasks. The seasonally counterbalanced design and the very northerly latitude of this study provide optimal conditions for detecting impaired cognitive performance in winter, and the conclusion is negative: of ®ve tasks with seasonal eects, four had disadvantages in summer. Like the menstrual cycle, the circannual cycle appears to in¯uence mood but not cognition.

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