Conceptual and Statistical Knowledge

Power failure: why small sample size undermines the reliability of neuroscience

A study with low statistical power has a reduced chance of detecting a true effect, but it is less well appreciated that low power also reduces the likelihood that a statistically significant result reflects a true effect. Here, we show that the …

Power-up: A reanalysis of ‘power failure’ in neuroscience using mixture modeling.

Recently, evidence for endemically low statistical power has cast neuroscience findings into doubt. If low statistical power plagues neuroscience, then this reduces confidence in the reported effects. However, if statistical power is not uniformly …

Prediction Interval: What to Expect When You’re Expecting … A Replication

A challenge when interpreting replications is determining whether the results of a replication “successfully” replicate the original study. Looking for consistency between two studies is challenging because individual studies are susceptible to many …

Preregistration Becoming the Norm in Psychological Science

A blog about Preregistration Becoming the Norm in Psychological Science

Preregistration is not a panacea, but why? A rejoinder to Chen & Li's (2024) “infusing preregistration into tourism research”

A viewpoint published in Tourism Management articulates the potential benefits of preregistration and ‘debunking myths' surrounding this controversial open-science practice (Chen and Li, 2024). This rejoinder critically examines six key arguments …

Primer on Reproducible Research in R: Enhancing Transparency and Scientific Rigor

Achieving research reproducibility is a precarious aspect of scientific practice. However, many studies across disciplines fail to be fully reproduced due to inadequate dissemination methods. Traditional publication practices often fail to provide a …

Procedimentos para investigação científica

O profissional formado pelo Curso de Graduação em Psicologia da Unifesspa caracterizar-se-á porpossuir uma formação pluralista e generalista, preparado para atuação multiprofissional pelaformação interdisciplinar com enfoque crítico, científico e …

Programming Psychological Experiments using python and OpenSesame

Using this material, you can learn how to code in python, build experiments using OpenSesame, and do basic data preprocessing in python.

Psychological testing and psychological assessment: A review of evidence and issues.

This article summarizes evidence and issues associated with psychological assessment. Data from more than 125 meta-analyses on test validity and 800 samples examining multimethod assessment suggest 4 general conclusions: (a) Psychological test …

Psychology’s Credibility Revolution

In 2011, Daryl Bem published a paper that seemed to demonstrate evidence for extra sensory perception (ESP). Four years later, the Open Science Collaboration failed to replicate 67 of 100 published psychological studies. These results and others have …