Pure Procrastination Scale e Irrational Procrastination Scale: Validation of a Brazilian Version

Abstract This study aimed to adapt and validate the Irrational Procrastination Scale (IPS) and Pure Procrastination Scale (PPS) for Brazilian Portuguese. Therefore, 2666 university students were invited to participate in the study (M = 26.08; SD = 6.6; 77% female). The factorial structures were analyzed through exploratory and confirmatory factor analyses. The validity was investigated through Pearson’s correlations between the subscales of the Academic Procrastination Questionnaire ─ Negative Consequences and DASS-21. The reliability of the scales and their factors were evaluated through Cronbach’s alpha. The results indicated a one-dimensional IPS structure and a three-factor solution with a higher-order factor for PPS. Significant correlations were found between the IPS and PPS with the other measurements, revealing concurrent and convergent validity for both scales. The instruments showed good internal consistency, with alphas ranging from 0.80 to 0.91.

摘要 本研究旨在适配并验证针对巴西葡萄牙语的非理性拖延量表（Irrational Procrastination Scale，IPS）与纯粹拖延量表（Pure Procrastination Scale，PPS）。本研究共招募2666名大学生参与（年龄均值M=26.08，标准差SD=6.6；女性占比77%）。研究通过探索性因素分析与验证性因素分析对量表的因子结构进行考察。采用学术拖延问卷（Academic Procrastination Questionnaire）负性后果分量表与DASS-21量表的Pearson相关系数，对量表的效度进行验证。通过克朗巴赫α系数（Cronbach’s alpha）评估两款量表及其各因子的信度。结果显示，非理性拖延量表为单维因子结构，纯粹拖延量表则为包含高阶因子的三维因子结构。非理性拖延量表与纯粹拖延量表均与其余测量工具存在显著相关，证实了二者的同时效度与会聚效度。两款量表均表现出良好的内部一致性，克朗巴赫α系数介于0.80至0.91之间。