Chimpanzee performance during the ballistic and orbital Project Mercury flights

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2 flights with chimpanzee Ss were conducted as part of NASA Project Mercury program. Ss were trained on modified operant tasks to measure effects of flights on learned behavior and to provide performance information prior to manned flights. The 1st S performed on a 2-component schedule and was flown in a ballistic trajectory (Mercury-Redstone 2); the 2nd S performed on a 5-component schedule during a 2-orbit flight around the earth (Mercury-Atlas 5). Both Ss were recovered safely. As a result of these 2 flights it was concluded that performance was relatively unaffected during weightlessness, that eating and drinking were accomplished without difficulty, and that behavioral measures are essential in assessing effects of space flight on living organisms. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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