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Recommendations for Increasing Replicability in Psychology †
Replicability of findings is at the heart of any empirical science. The aim of this article is to move the current replicability debate in psychology towards concrete recommendations for improvement.…
The Rules of the Game Called Psychological Science
- Marjan Bakker, A. van Dijk, J. Wicherts
- PsychologyPerspectives on psychological science : a journal…
- 1 November 2012
This paper considers 13 meta-analyses covering 281 primary studies in various fields of psychology and finds indications of biases and/or an excess of significant results in seven, highlighting the need for sufficiently powerful replications and changes in journal policies.
A dynamical model of general intelligence: the positive manifold of intelligence by mutualism.
- H.L.J. van der Maas, C. Dolan, R. Grasman, J. Wicherts, H. Huizenga, M. Raijmakers
- PsychologyPsychological review
- 30 September 2006
A new explanation of the positive manifold based on a dynamical model is proposed, in which reciprocal causation or mutualism plays a central role, and it is shown that thepositive manifold emerges purely by positive beneficial interactions between cognitive processes during development.
Meta-analysis of psychological treatments for posttraumatic stress disorder in adult survivors of childhood abuse.
The Ordinal Effects of Ostracism: A Meta-Analysis of 120 Cyberball Studies
It is suggested that both first and last measures are susceptible to moderation and time passed since being ostracized does not predict effect sizes of the last measure, and modifications to the temporal need-threat model of ostracism are suggested.
The (mis)reporting of statistical results in psychology journals
The authors' results indicate that around 18% of statistical results in the psychological literature are incorrectly reported, and that errors were often in line with researchers’ expectations.
Degrees of Freedom in Planning, Running, Analyzing, and Reporting Psychological Studies: A Checklist to Avoid p-Hacking
- J. Wicherts, C. L. Veldkamp, Hilde E. M. Augusteijn, Marjan Bakker, R. V. van Aert, M. V. van Assen
- PsychologyFront. Psychol.
- 3 November 2016
An extensive list of 34 degrees of freedom that researchers have in formulating hypotheses, and in designing, running, analyzing, and reporting of psychological research is presented.
Meta-analysis of associations between human brain volume and intelligence differences: How strong are they and what do they mean?
Are intelligence tests measurement invariant over time? Investigating the nature of the Flynn effect
The prevalence of statistical reporting errors in psychology (1985–2013)
- Michèle B. Nuijten, C.H.J. Hartgerink, M. V. van Assen, S. Epskamp, J. Wicherts
- PsychologyBehavior research methods
- 23 October 2015
It was found that half of all published psychology papers that use NHST contained at least one p-value that was inconsistent with its test statistic and degrees of freedom, and the average prevalence of inconsistent p-values has been stable over the years or has declined.