Within-Group Agreement ( r WG ): Two Theoretical Parameters and their Estimators
区分了组内一致性的两个理论参数（个体真分数共识和组真分数信度类比），系统比较了不同估计量，为组织气候、领导力等群体心理属性的测量提供估计建议。
When measuring group-level psychological properties (e.g., organizational climate, leadership, team motivation), researchers typically aggregate individual perceptions to represent the group. L. R. James provided the groundbreaking insight that, in order to justify aggregating individual perceptions to represent a group-level property, one must first establish that there exist shared perceptions—or shared psychological meaning—within the group. Here we label and describe two distinct theoretical parameters that can both be used to define within-group agreement: (a) [Formula: see text] (i.e., a parameter that defines within-group agreement as Individual True-Score Consensus), which arises from the theoretical work of L. R. James and colleagues in the 1970s, and (b) [Formula: see text] (i.e., a parameter that treats within-group agreement as a Group True-Score Reliability Analog), which forms the theoretical basis for the [Formula: see text] index. We extend the work of L. R. James by offering a systematic comparison of different estimators of the two within-group agreement parameters ([Formula: see text] and [Formula: see text]). Recommendations are provided for estimating within-group agreement, to continue the legacy of justified measurement of group-level psychological properties.