Likelihood of Null Effects of Large NHLBI Clinical Trials Has Increased over Time

Background: We explore whether the number of null results in large National Heart Lung, and Blood Institute (NHLBI) funded trials has increased over time. Methods: We identified all large NHLBI supported RCTs between 1970 and 2012 evaluating drugs or …

Methods for Reliable, Transparent, and Open Science

A syllabus about the methods for reliable, transparent and open science

Open science toolbox

There is a vast body of helpful tools that can be used in order to foster Open Science practices. For reasons of clarity, this toolbox aims at providing only a selection of links to these resources and tools. Our goal is to give a short overview on …

Open science: many hands make light work

Open science has been highlighted as one of the priorities of the Dutch presidency of the European Union in 2016. Matthew Dovey discusses the motivations behind the open science movement and why initiatives to support it are more important than ever. …

P-Hacking and Other Problems in Psychology Research

What's wrong with the social sciences? In this episode, Massimo and Julia are joined by Professor Daniel Lakens from the Eindhoven University of Technology, who studies psychology and blogs about research methods and open science. The three discuss …


PANGEA is the first power analysis program for general ANOVA designs (e.g., Winer, Brown, & Michels, 1991). PANGEA can handle designs with any number of factors, each with any number of levels; any factor can be treated as fixed or random; and any …

Philosophical Psychology 1989

P. E. Meehl did first 10 sessions (Winter Quarter, Jan–Mar 1989). In the Spring Quarter, several other department members lectured on various topics. Then PEM did last two sessions (5/25/89 and 6/1/89).

Pre-registration in social psychology—A discussion and suggested template.

Pre-registration of studies before they are conducted has recently become more feasible for researchers, and is encouraged by an increasing number of journals. However, because the practice of pre-registration is relatively new to psychological …

Pre-registration of clinical trials is associated with fewer positive findings

Pre-registration of clinical trials is associated with fewer positive findings

Preregistration Becoming the Norm in Psychological Science

A blog about Preregistration Becoming the Norm in Psychological Science