Abstract：
Exercising can be theorized as the result of choosing one behavior over alternative behaviors. The Decisional Preferences in Exercising (DPEX) test is a computerized, easy-to-use, publicly available (open source Python code: https://osf.io/ahbjr/) and highly adaptive research tool based on this rationale. In the DPEX, participants are asked to choose between two images by pressing a key on the computer keyboard, one showing a physical exercise and the other showing a non-exercise behavioral alternative in a series of trials. Combinations are randomly assembled from two definable pools of stimuli trial-per-trial. The test can be scored either based on a crossed random effects model (facilitating the use of different stimulus material in different studies without compromising the comparability of test scores) or with a simple proportion score. Data from diverse study samples (N = 451) showed strong correlations of DPEX scores with past and future exercise behavior (r = 0.42 and 0.47 respectively) as well as with affective experiences with exercise (e.g., \'pleasure-displeasure\': r = 0.47). DPEX test scores discriminated between exercisers and non-exercisers according to receiver operating curve (ROC) analysis. The DPEX may be used to examine research questions derived from dual process theories, the effects of psychological states on behavioral choices can be tested, or the effects of behavior change interventions can be evaluated. The DPEX helps to avoid common method bias in the assessment of exercise behavior, for example, when psychological variables are measured with questionnaires.
摘要：
运动可以被理论化为选择一种行为而不是替代行为的结果。锻炼中的决策偏好(DPEX)测试是一种计算机化的，易于使用，公开可用（开源Python代码：https://osf.io/ahbjr/）和基于此基本原理的高度自适应研究工具。在DPEX中,参与者被要求通过按下计算机键盘上的一个键在两个图像之间进行选择，在一系列试验中，一个显示体育锻炼，另一个显示非锻炼行为选择。组合是从每个试验的两个可定义的刺激试验池中随机组装的。可以基于交叉随机效应模型（促进在不同研究中使用不同的刺激材料而不损害测试分数的可比性）或使用简单的比例分数对测试进行评分。来自不同研究样本（N=451）的数据显示，DPEX得分与过去和未来的运动行为（分别为r=0.42和0.47）以及与运动的情感体验（例如，\'快乐-不快乐\'：r=0.47）。DPEX测试分数根据受试者工作曲线（ROC）分析在锻炼者和非锻炼者之间进行区分。DPEX可用于检查来自双重过程理论的研究问题，可以测试心理状态对行为选择的影响，或者可以评估行为改变干预措施的效果。DPEX有助于避免运动行为评估中常见的方法偏差，例如,当用问卷测量心理变量时。
