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

There is a confidence crisis in many scientific disciplines, in particular disciplines
researching human behavior, as many effects of original experiments have not been …

Conjecture about the weak replicability in social sciences has made scholars eager to
quantify the scale and scope of replication failure for a discipline. Yet small-scale manual …

Selectively publishing results that support the tested hypotheses (“positive” results) distorts
the available evidence for scientific claims. For the past decade, psychological scientists …

Power analysis for first-order interactions poses two challenges:(a) Conducting an
appropriate power analysis is difficult because the typical expected effect size of an …

Publication bias and questionable research practices in primary research can lead to badly
overestimated effects in meta-analysis. Methodologists have proposed a variety of statistical …

Concerns about the veracity of psychological research have been growing. Many findings in
psychological science are based on studies with insufficient statistical power and …

The debate about false positives in psychological research has led to a demand for higher
statistical power. To meet this demand, researchers need to collect data from larger samples …

Hypothesizing after the results are known, or HARKing, occurs when researchers check their
research results and then add or remove hypotheses on the basis of those results without …

Preregistration has gained traction as one of the most promising solutions to improve the
replicability of scientific effects. In this project, we compared 193 psychology studies that …