The hidden redundancy in psychological trait measures: A general factor of personality (GFP) perspective

In psychology there is a plethora of different measures and constructs. However, the literature also shows that many of these measures overlap and may even sometimes be redundant. Recognizing such overlap in measures is essential for consolidation and for moving the field forward. Accordingly, we suggest a role herein of the General Factor of Personality (GFP), which emerges from the correlations between specific personality dimensions and reflects a mix of desirable traits (e.g. being sociable, honest, and emotionally stable). It is argued and shown that the GFP is highly correlated with a wide range of psychological traits. We further postulate that this phenomenon provides a parsimonious way of looking at the overlap between many trait measures. This idea is discussed in light of the ongoing debate on the GFP in which some scholars suggest the general factor is substantive and relevant for understanding personality, whereas others consider it to solely reflect a measurement artifact. Irrespective of whether the substantive, artifact, or a mixed explanation of the GFP is adopted, overlooking the presence of a common general factor in psychological measures may, respectively, either impede the development of unifying theories of human behavior, or otherwise compromise measurement validity.