This article compiles results from a century of social psychological research, more than 25,000 studies of 8 million people. A large number of social psychological conclusions are listed alongside meta-analytic information about the magnitude and variability of the corresponding effects. References to 322 meta-analyses of social psychological phenomena are presented, as well as statistical effect-size summaries. Analyses reveal that social psychological effects typically yield a value of r equal to.21 and that, in the typical research literature, effects vary from study to study in ways that produce a standard deviation in r of.15. Uses, limitations, and implications of this large-scale compilation are noted.

Many social psychologists believe that if research results are obvious, they are unimportant and uninteresting. The current study evaluated lay perceptions of social psychological research findings. Results from three studies reveal differences between lay evaluations of research and scientific evaluations. In Study 1, students with no prior exposure to social psychology judge the most obvious research findings to be the most important. In Study 2, students can predict findings, and the most predictable findings are judged most important. In Study 3, students judge the most obvious findings to be most important to establish with research. Results address the accuracy of lay judgments of research, judgmental strategies, and the process by which social psychologists select research topics.

To analyze variance in a triadic variable, Bond, Horn, and Kenny (1997) have proposed a Triadic Relations Model. Here we extend this model to analyze the covariances between triadic variables. A bivariate version of the Triadic Relations Model is specified, and estimation methods are presented. These can be used to decompose the covariance between two triadic variables into thirty-three covariance components. Interpretations and an example of this analysis are offered. Applications of this model and alternative techniques are noted.

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