Udi Alter

York University · Department of Psychology

The over-reliance on the null hypothesis significance testing framework and its accompanying tools has recently been challenged. An example of such a tool is statistical power analysis, which is used to determine how many participants are required to detect a minimally meaningful effect size in the population at a given level of power and Type I er...

This large, international dataset contains survey responses from N = 12,570 students from 100 universities in 35 countries, collected in 21 languages. We measured anxieties (statistics, mathematics, test, trait, social interaction, performance, creativity, intolerance of uncertainty, and fear of negative evaluation), self-efficacy, persistence, and...

This large, international dataset contains survey responses from N = 12,570 students from 100 universities in 35 countries, collected in 21 languages. We measured anxieties (statistics, mathematics, test, trait, social interaction, performance, creativity, intolerance of uncertainty, and fear of negative evaluation), self-efficacy, persistence, and...

Central to understanding human behavior is a comprehensive mapping of brain-behavior relations within the context of lifespan development. Reproducible discoveries depend upon well-powered samples of reliable data. We provide to the scientific community two, 10-minute, multi-echo functional MRI (ME-fMRI) runs, and structural MRI (T1-MPRAGE), from 1...

Reporting and interpreting effect sizes (ESs) has been recommended by all major bodies within the field of psychology. In this systematic review, we investigated the reporting of ESs in six social-personality psychology journals from 2018, given that this area has been at the center of psychology’s replication crisis. Our results highlight that alt...

Psychological research is rife with inappropriately concluding “no effect” between predictors and outcome in regression models following statistically nonsignificant results. However, this approach is methodologically flawed because failing to reject the null hypothesis using traditional, difference-based tests does not mean the null is true. Using...

Reporting and interpreting effect sizes has been recommended by all major bodies within the field of Psychology. In this systematic review, we investigated the reporting of ES in six Social-Personality Psychology journals from 2018, given that this area has been at the center of Psychology’s replication crisis. Our results highlight that although E...