Trouble at the lab

The Economist: “I SEE a train wreck looming,” warned Daniel Kahneman, an eminent psychologist, in an open letter last year. The premonition concerned research on a phenomenon known as “priming”. Priming studies suggest that decisions can be influenced by apparently irrelevant actions or events that took place just before the More

Failure to Replicate the Mehta and Zhu (2009) Color Effect

Mehta and Zhu (2009) reported several studies in Science on the effects of the colors red and blue over a series of cognitive tasks. Red was hypothesized to induce a state of avoidance motivation which would cause people to become more vigilant and risk-averse in a task. Blue was hypothesized More

The Prevalence of Declining Effect Sizes in Educational Research

Effect sizes are the statistic generated by meta-analyses, a commonly used statistic in education research. This project uses a methodological framework similar to that of Jennions and Moller (2001) to determine whether declining effect sizes can be observed in educational research and attempts to explain possible causes of this observation. More

Understanding Replication: Confidence Intervals Much Better Than p Values

Geoff Cumming, La Trobe University, Australia, presents his research on “Understanding Replication: Confidence Intervals Much Better Than p Values,” at the 25th APS Annual Convention. Replication is at the heart of science. A current hot topic across medicine, psychological science, and other disciplines is that a number of widely-accepted published More