Replication—an important, uncommon, and misunderstood practice—is gaining
appreciation in psychology. Achieving replicability is important for making research …

Most neuroscientists would agree that for brain research to progress, we have to know which
experimental manipulations have no effect as much as we must identify those that do have …

Sex plays a crucial role in human brain development, aging, and the manifestation of
psychiatric and neurological disorders. However, our understanding of sex differences in …

We draw on genetics research to argue that complex psychological phenomena are most
likely determined by a multitude of causes and that any individual cause is likely to have …

Turmoil has engulfed psychological science. Causes and consequences of the
reproducibility crisis are in dispute. With the hope of addressing some of its aspects …

Mixed-effects models are a powerful tool for modeling fixed and random effects
simultaneously, but do not offer a feasible analytic solution for estimating the probability that …

Identifying brain biomarkers of disease risk is a growing priority in neuroscience. The ability
to identify meaningful biomarkers is limited by measurement reliability; unreliable measures …

With the explosion of neuroimaging, differences between male and female brains have been
exhaustively analyzed. Here we synthesize three decades of human MRI and postmortem …

Given that an effect size of d=. 4 is a good first estimate of the smallest effect size of interest
in psychological research, we already need over 50 participants for a simple comparison of …

Abstract Background and Objectives Researchers typically use Cohen's guidelines of
Pearson'sr=. 10,. 30, and. 50, and Cohen'sd= 0.20, 0.50, and 0.80 to interpret observed …