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The objective of this study was to determine whether there was significant change in cognitive performance by prolonged duration of residence in polar environment. We examined volunteers (N = 23, scientific and logistic personnel) who spent fourteen months of continuous stay at ‘Maitri’ – The Indian research base in Antarctica (70 °45′S, 11 °44′E). Cognitive measures (tests of task acquisition, delayed recognition, attention and concentration, and digit symbol substitution) were obtained at the beginning (second month), the middle (seventh month) and the final (twelfth month) phases of prolonged residence in Antarctica. A repeated-measures MANOVA was conducted and the findings indicated a significant increase in percent accuracy in performance of task acquisition, delayed recognition and digit symbol tests that assessed recognition memory and learning. The test of attention and concentration that measured short-term memory for digits showed stable performance over a long-duration of residence in polar environment. 相似文献