Looking on the bright side: Replicating the association between brightness and positivity

Abstract

The present study is a pre-registered replication of a study by Specker et al. (2018) that tests the hypothesis that brightness of colors is associated with positivity. Our results showed an implicit association between brightness and positivity in both Study 1 and Study 2, however, an explicit association between brightness and positivity was only found in Study 2, thereby replicating 3 out of 4 effects. To investigate these effects in more detail, we present a meta-analysis of both the original and the replication study. This indicated a large effect 1.31 [1.12, 1.51]. In addition, we used meta-analysis to assess potential moderators of the effect, in particular stimulus type (chromatic vs. achromatic) and measure type (implicit vs. explicit). This indicated that the effect is stronger when measured implicitly than when measured explicitly and that the effect is stronger when achromatic stimuli are used. In sum, we take these findings to indicate that there is a strong and replicable association between brightness and positivity. These findings offer researchers interested in the effect concrete tools when designing a study investigating the effect with regard to effect size estimates for power analysis as well as stimulus and measurement design.