wicherts.bsky.social
@wicherts.bsky.social
Professor in methodology. Posts about meta-research, intelligence, open science, methods, and bias & error in (psychological) science. Also proud father of 4
Reposted by wicherts.bsky.social
How complete are preregistrations?
Short answer: 53% include all 6 procedural specifications
Medium answer: 🧵
Long answer: check out my publication with A. Glöckner @mariogollwitzer.bsky.social J. Hellmann, J. Lange, S. Schindler & @kaisassenberg.bsky.social
doi.org/10.1177/2515...
Short answer: 53% include all 6 procedural specifications
Medium answer: 🧵
Long answer: check out my publication with A. Glöckner @mariogollwitzer.bsky.social J. Hellmann, J. Lange, S. Schindler & @kaisassenberg.bsky.social
doi.org/10.1177/2515...
A Cross-Sectional Study of the Completeness of Preregistrations by Psychological Authors From German-Speaking Institutions - Lena Hahn, Andreas Glöckner, Mario Gollwitzer, Jens Hellmann, Jens Lange, S...
Preregistering confirmatory research aims at reducing researchers’ degrees of freedom and increasing transparency to ultimately increase replicability. Yet the ...
doi.org
August 18, 2025 at 11:06 AM
How complete are preregistrations?
Short answer: 53% include all 6 procedural specifications
Medium answer: 🧵
Long answer: check out my publication with A. Glöckner @mariogollwitzer.bsky.social J. Hellmann, J. Lange, S. Schindler & @kaisassenberg.bsky.social
doi.org/10.1177/2515...
Short answer: 53% include all 6 procedural specifications
Medium answer: 🧵
Long answer: check out my publication with A. Glöckner @mariogollwitzer.bsky.social J. Hellmann, J. Lange, S. Schindler & @kaisassenberg.bsky.social
doi.org/10.1177/2515...
What it takes to tutor—A preregistered direct replication of the scaffolding experimental study by D. Wood et al. (1978).
psycnet.apa.org/fulltext/202...
psycnet.apa.org/fulltext/202...
APA PsycNet
psycnet.apa.org
July 14, 2025 at 12:03 PM
What it takes to tutor—A preregistered direct replication of the scaffolding experimental study by D. Wood et al. (1978).
psycnet.apa.org/fulltext/202...
psycnet.apa.org/fulltext/202...
Reposted by wicherts.bsky.social
📣New Preprint Alert!
Esther Maassen meticulously simulated the effect of p-hacking and publication bias on effect size & heterogeneity estimates.
💡bad: selective outcome reporting & optional dropping
💡bad: publication bias
💡not so bad: optional stopping/outlier removal
osf.io/preprints/ps...
Esther Maassen meticulously simulated the effect of p-hacking and publication bias on effect size & heterogeneity estimates.
💡bad: selective outcome reporting & optional dropping
💡bad: publication bias
💡not so bad: optional stopping/outlier removal
osf.io/preprints/ps...
OSF
osf.io
June 19, 2025 at 8:46 AM
📣New Preprint Alert!
Esther Maassen meticulously simulated the effect of p-hacking and publication bias on effect size & heterogeneity estimates.
💡bad: selective outcome reporting & optional dropping
💡bad: publication bias
💡not so bad: optional stopping/outlier removal
osf.io/preprints/ps...
Esther Maassen meticulously simulated the effect of p-hacking and publication bias on effect size & heterogeneity estimates.
💡bad: selective outcome reporting & optional dropping
💡bad: publication bias
💡not so bad: optional stopping/outlier removal
osf.io/preprints/ps...
Vacancy: We are looking for two fully paid PhD students in methodology and statistics as part of my NWO-funded VICI project Examining Variation in Causal Effects in Psychology!
www.academictransfer.com/nl/338321/ph...
www.academictransfer.com/nl/338321/ph...
February 27, 2024 at 3:29 PM
Vacancy: We are looking for two fully paid PhD students in methodology and statistics as part of my NWO-funded VICI project Examining Variation in Causal Effects in Psychology!
www.academictransfer.com/nl/338321/ph...
www.academictransfer.com/nl/338321/ph...