Schmidt A J
J Psychosom Res. 1985;29(2):183-9. doi: 10.1016/0022-3999(85)90040-6.
An experimental group of 39 chronic low back pain (CLBP) patients and an equal number of controls, matched for age and sex, completed questionnaires of self-concept and performance motivation. SS were also tested on a standardized back-stress physical test carried out with low external information and feedback. The results revealed a strong tendency for CLBP patients to have a negative self-concept, confirming the findings of previous research. Poorer performance of the CLBP patients on the physical test measure of behavioural persistence and on physiological measures were unrelated to reported pain level or to poor physical condition. Compared to the controls, the chronic low back pain group was less able to estimate their physiological level of exertion, being inclined to overrate their actual individual effort. The interaction of a negative self-concept and negative expectations is discussed.
一个由39名慢性下腰痛（CLBP）患者组成的实验组和数量相等、年龄和性别匹配的对照组完成了自我概念和表现动机问卷。受试者还接受了一项标准化的背部压力体能测试，该测试提供的外部信息和反馈较少。结果显示，CLBP患者有强烈的消极自我概念倾向，证实了先前研究的结果。CLBP患者在行为持久性的体能测试指标和生理指标方面表现较差，这与报告的疼痛程度或身体状况不佳无关。与对照组相比，慢性下腰痛组更难以估计自己的生理运动水平，倾向于高估自己实际的个人努力程度。文中讨论了消极自我概念和消极期望的相互作用。
