Dishman R K, Darracott C R, Lambert L T
Department of Exercise Science, University of Georgia, Athens 30602.
Med Sci Sports Exerc. 1992 Aug;24(8):904-10.
We hypothesized that the prediction of physical activity from psychological determinants would differ when free-living physical activity was assessed by electromechanical or self-report methods. We assessed outcome-expectancy values and perceived barriers for physical activity (OE Values/P Barriers) and physical self-efficacy in 44 young (24 yr +/- 4.8) Caucasian men (N = 13) and women (N = 31). Two weeks later, subjects kept a daily diary and wore a Caltrac motion sensor during all ambulation for seven consecutive days. Reliability (PI) across days was high for MET.h of activity estimated by the diary (0.82) and for Caltrac counts (0.87). Canonical correlation analysis yielded one significant linear combination (Rc = 0.55, P less than 0.01; redundancy = 0.19 to 0.24) of the set of psychological variables [OE Values/P Barriers (beta = 0.76) and physical self-efficacy (B = 0.33)] and the set of physical activity estimates [7-d diary (B = 0.89) and Caltrac (beta = 0.24)]. Multiple correlations indicated that the linear combination of OE Values/P Barriers and physical self-efficacy explained 26% of the variation in MET.h reported in the 7-d diary (P less than 0.01) but was unrelated to Caltrac counts (P greater than 0.05). The strongest bivariate model included the 7-d diary and OE Values/P Barriers (r = 0.51, P less than 0.01). Caltrac counts were weakly related to OE Values/P Barriers (r = 0.34, P less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
我们假设，当通过机电或自我报告方法评估自由生活中的身体活动时，由心理决定因素对身体活动的预测会有所不同。我们评估了44名年轻（24岁±4.8岁）的白种男性（n = 13）和女性（n = 31）的结果期望价值、身体活动的感知障碍（OE值/P障碍）以及身体自我效能。两周后，受试者连续七天每天记日记，并在所有步行过程中佩戴Caltrac运动传感器。日记估计的活动代谢当量小时数（MET.h）（0.82）和Caltrac计数（0.87）的日间可靠性（PI）很高。典型相关分析得出心理变量集[OE值/P障碍（β = 0.76）和身体自我效能（B = 0.33）]与身体活动估计集[7天日记（B = 0.89）和Caltrac（β = 0.24）]的一个显著线性组合（Rc = 0.55，P < 0.01；冗余度 = 0.19至0.24）。多重相关表明，OE值/P障碍和身体自我效能的线性组合解释了7天日记中报告的MET.h变化的26%（P < 0.01），但与Caltrac计数无关（P > 0.05）。最强的双变量模型包括7天日记和OE值/P障碍（r = 0.51，P < 0.01）。Caltrac计数与OE值/P障碍的相关性较弱（r = 0.34，P < 0.05）。（摘要截断于250字）
