Conceptual and Statistical Knowledge

Data management

A series of video of data management

Data peeking without p-hacking

Blog post going over data peeking without p-hacking

Data reuse and the open data citation advantage

Background. Attribution to the original contributor upon reuse of published data is important both as a reward for data creators and to document the provenance of research findings. Previous studies have found that papers with publicly available …

Data tutorial: Power analysis using G*Power

A tutorial on a priori and sensitivity power analyses using G*power

Decisions, Decisions, Decisions: An Ethnographic Study of Researcher Discretion in Practice

This paper is a study of the decisions that researchers take during the execution of a research plan: their researcher discretion. Flexible research methods are generally seen as undesirable, and many methodologists urge to eliminate these so-called …

Defining and distinguishing validity: Interpretations of score meaning and justifications of test use.

The concept of validity has suffered because the term has been used to refer to 2 incompatible concerns: the degree of support for specified interpretations of test scores (i.e., intended score meaning) and the degree of support for specified …

Degrees of Freedom in Planning, Running, Analyzing, and Reporting Psychological Studies: A Checklist to Avoid p-Hacking

The designing, collecting, analyzing, and reporting of psychological studies entail many choices that are often arbitrary. The opportunistic use of these so-called researcher degrees of freedom aimed at obtaining statistically significant results is …

Degrees of Freedom Tutorial

A lot of researchers seem to be struggling with their understanding of the statistical concept of degrees of freedom. Most do not really care about why degrees of freedom are important to statistical tests, but just want to know how to calculate and …

Distribution of p-values when comparing two groups

An interactive visualisation of the distribution of p-values when comparing two groups

Diversifying Research Methods Syllabi

This is a collection of research methodology articles, which are first- or senior-authored by women, to promote diverse perspectives in teaching students about research methods and contributing to improving research practices.