Old Dominion University, USA.
The Ohio State University, USA.
Disabil Health J. 2017 Oct;10(4):571-579. doi: 10.1016/j.dhjo.2017.03.008. Epub 2017 Mar 24.
When exploring reasons why individuals with visual impairments (VI) may or may not engage in physical activity (PA) or sedentary behaviors (SB), theoretically grounded research on the determinants of these behaviors is scarce.
OBJECTIVE/HYPOTHESIS: Situated in the theory of planned behavior (TpB), the purposes of this study were to: (a) develop a theoretically-sound scale, Beliefs about Physical and Sedentary Behaviors-Visual Impairment (BAPS-VI), to determine if the constructs of TpB are useful in predicting PA and SBs of adults with VI; (b) analyze their beliefs about PA and SBs; and (c) determine which TpB constructs are the best predictors of PA behaviors.
Data were collected from adults with VI (n = 209, 65.5% women) using on-line survey methodology. Following reliability estimation, the PA and SB items were reduced using separate Principal Components analyses to examine the underlying dimension of the BAPS-VI in relation to TpB. A hierarchical regression model was used to determine what factors predicted self-reports of minutes of PA.
Results supported the theoretical framework of the measure and explained 75% of the variance for intention to engage in PA and SB items, respectively. Six new variables, intention, and demographic data were then regressed on physical activity scores with only intention to engage in PA (β = 0.30, p < 0.01) remaining as a significant predictor of physical activity.
The development of the theoretically driven measure and results of this study can inform future research focusing on exploring PA and SBs of adults with VI.
在探索视力障碍者（VI）参与或不参与体育活动（PA）或久坐行为（SB）的原因时，基于理论的对这些行为决定因素的研究很少。
目的/假设：本研究以计划行为理论（TpB）为基础，旨在：（a）制定一个理论上合理的量表，即对身体和久坐行为的信念-视力障碍（BAPS-VI），以确定 TpB 的结构是否可用于预测 VI 成年人的 PA 和 SB；（b）分析他们对 PA 和 SB 的信念；和（c）确定 TpB 结构中哪些是 PA 行为的最佳预测指标。
使用在线调查方法从 VI 成年人（n=209，65.5%女性）中收集数据。在进行可靠性估计后，使用单独的主成分分析减少 PA 和 SB 项目，以检查 BAPS-VI 与 TpB 的关系的潜在维度。使用分层回归模型来确定哪些因素可以预测自我报告的 PA 分钟数。
结果支持该测量的理论框架，并分别解释了 PA 和 SB 项目意图的 75%的方差。然后，将六个新变量、意图和人口统计学数据与 PA 得分进行回归，只有参与 PA 的意图（β=0.30，p<0.01）仍然是 PA 的显著预测指标。
该理论驱动的测量方法的开发和本研究的结果可以为未来的研究提供信息，重点是探索 VI 成年人的 PA 和 SB。
