A worrying number of psychological findings are not replicable. Diagnoses of the causes of
this “replication crisis,” and recommendations to address it, have nearly exclusively focused …

The estimation of power in two-level models used to analyze data that are hierarchically
structured is particularly complex because the outcome contains variance at two levels that …

With a large international sample (n= 8317), the present study examined which beliefs and
attitudes about COVID-19 predict 1) following government recommendations, 2) taking …

In virtually all areas of psychology, the question of whether a particular construct has a
prospective effect on another is of fundamental importance. For decades, the cross-lagged …

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 …

In the last decade Open Science principles have been successfully advocated for and are
being slowly adopted in different research communities. In response to the COVID-19 …

Power analysis is an important tool to use when planning studies. This contribution aims to
remind read-ers what power analysis is, emphasize why it matters, and articulate when and …

Empirical research inevitably includes constructing a data set by processing raw data into a
form ready for statistical analysis. Data processing often involves choices among several …

Psychology advances knowledge by testing statistical hypotheses using empirical
observations and data. The expectation is that most statistically significant findings can be …

A reproducibility crisis is a situation where many scientific studies cannot be reproduced.
Inappropriate practices of science, such as HARKing, p-hacking, and selective reporting of …