Jensen M P, Karoly P
Department of Rehabilitation, University of Washington, Seattle.
Psychosom Med. 1991 Mar-Apr;53(2):144-52. doi: 10.1097/00006842-199103000-00004.
Placebos are widely recognized as having a potentially powerful effect on health and health behavior, yet our understanding of the placebo phenomenon is limited. Many factors are considered to be associated with placebo responding. This study was designed to examine, in a laboratory context, the effects of two of these factors, motivation and expectation, on one kind of placebo response, that which involves the perception of symptoms. The results point to the importance of motivation in influencing the perception of symptom change, and provide limited support for the importance of expectation. The findings underscore the necessity for examining placebo effects from a multicomponent perspective, and appear to mandate the inclusion of both expectancy and motivation factors in future process and outcome studies.
安慰剂被广泛认为对健康和健康行为具有潜在的强大影响，然而我们对安慰剂现象的理解是有限的。许多因素被认为与安慰剂反应有关。本研究旨在在实验室环境中考察其中两个因素——动机和期望——对一种安慰剂反应（即涉及症状感知的反应）的影响。结果表明动机在影响症状变化感知方面的重要性，并为期望的重要性提供了有限的支持。这些发现强调了从多成分角度研究安慰剂效应的必要性，并且似乎要求在未来的过程和结果研究中纳入期望和动机因素。
