评估减少久坐行为的自我效能感的测量工具的制定与初步验证。

Development and Initial Validation of a Measure to Assess Self-Efficacy to Reduce Sedentary Behavior.

出版信息

Med Sci Sports Exerc. 2023 Oct 1;55(10):1933-1939. doi: 10.1249/MSS.0000000000003215. Epub 2023 May 19.

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10524260/

Abstract

INTRODUCTION

The purpose of this study was to assess the reliability and construct validity of a measure designed to evaluate self-efficacy to reduce sedentary behavior (SB).

METHODS

Initial instrument development was based on semistructured interviews and in-depth review of existing measures of self-efficacy for physical activity (PA). Items were drafted by the study authors and reviewed by SB experts. Participants recruited via Amazon Mechanical Turk completed the pool of items and the Exercise Confidence Survey and provided self-reported PA, SB, and demographic information. The sample was divided into two random halves, and exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were performed on each half, respectively. Internal consistency reliability (Cronbach's alpha) was calculated for the final scale. Initial criterion validity was examined in relation to self-reported SB and PA. Analyses were conducted in SAS 9.4 and Mplus 8.3.

RESULTS

Data were collected from N = 818 adults (47.6% women, mean (standard deviation) age, 37.8 (10.6)). EFA results strongly supported a one-factor scale. Items with low factor loadings (<0.65) were dropped from the scale; 10 items were retained. CFA demonstrated that the 10-item measure fit the data well, but one item had a low factor loading. A final scale with nine items was retained, with good fit to the data ( χ2 (27) = 90.79, P < 0.0001, comparative fit statistic = 0.97, root mean square error of approximation = 0.08 [90% confidence interval, 0.06-0.09], standardized root mean square residual = 0.03), and all items had high factor loadings (>0.70). Internal consistency reliability was high ( α = 0.91). Self-efficacy to reduce SB was significantly and positively correlated with exercise confidence ( r = 0.32-0.38, P < 0.0001).

CONCLUSIONS

We developed a nine-item measure of self-efficacy to reduce SB that demonstrates strong initial psychometric properties. Although related to exercise self-efficacy, self-efficacy to reduce SB represents a distinct construct.

摘要

简介

本研究旨在评估一项旨在评估减少久坐行为（SB）自我效能感的测量工具的可靠性和结构有效性。

方法

初步工具开发基于半结构化访谈和对现有身体活动（PA）自我效能感测量的深入回顾。研究作者起草了项目，并由 SB 专家进行了审查。通过亚马逊 Mechanical Turk 招募的参与者完成了项目库和运动信心调查，并提供了自我报告的 PA、SB 和人口统计信息。该样本被分为两个随机的一半，分别对每个一半进行探索性因子分析（EFA）和验证性因子分析（CFA）。最后，为最终量表计算内部一致性信度（Cronbach 的 alpha）。初步标准有效性与自我报告的 SB 和 PA 进行了检验。分析在 SAS 9.4 和 Mplus 8.3 中进行。

结果

共收集了 818 名成年人（47.6%为女性，平均（标准差）年龄为 37.8（10.6））的数据。EFA 结果强烈支持单因素量表。因子负荷低（<0.65）的项目从量表中删除；保留 10 个项目。CFA 表明，10 项测量工具很好地适用于数据，但有一个项目的因子负荷较低。保留了一个包含 9 个项目的最终量表，数据拟合良好（ χ2（27）= 90.79，P < 0.0001，比较拟合统计量= 0.97，均方根误差近似值 = 0.08 [90%置信区间，0.06-0.09]，标准化均方根残差 = 0.03），并且所有项目的因子负荷都很高（>0.70）。内部一致性信度较高（α=0.91）。减少 SB 的自我效能感与运动信心显著正相关（ r = 0.32-0.38，P < 0.0001）。