statistical analysis

Many High-Quality Randomized Controlled Trials in Sports Physical Therapy Are Making False-Positive Claims of Treatment Effect: A Systematic Survey Chris Bleakley; Jonathan Reijgers; James M. Smoliga Objective To examine the risk of false-positive reporting within high-quality randomized...

The Works in Progress Newsletter The stats gap Ellen Pasternack Extract: What you’ve been taught is something anthropologist Richard McElreath calls a ‘golem’. Golems, most famously the Golem of Prague, are powerful clay giants (or so the legend goes) created to defend local...

Known methodological issues such as publication bias, questionable research practices and studies with underpowered designs are known to decrease the replicability of study findings. The presence of such issues has been widely established across different research fields, especially in...

Virtually all the statistical methods researchers commonly use to assess genetic correlations assume that mating is random. That is, they assume that potential mating partners decide who they will have children with based on a roll of the dice. In reality, many factors likely influence who mates...

Background and Objective Meta-analysis and meta-regression are often highly cited and may influence practice. Unfortunately, statistical errors in meta-analyses are widespread and can lead to flawed conclusions. The purpose of this article was to review common statistical errors in...

Excerpt: Could the p-values in a paper be large because the researchers have conducted a careful power analysis? The argument goes like this: Researchers don’t want to be wasteful with their resources, so they do their best to predict the effect size that their experiment will yield. Once...

Background Estimated effects vary across studies, partly because of random sampling error and partly because of heterogeneity. In meta-analysis, the fraction of variance that is due to heterogeneity is estimated by the statistic I2. We calculate the bias of I2, focusing on the situation where...

One statistical analysis must not rule them all, 2022, Wagenmakers, Sarafoglou, Aczel, Nature, https://www.nature.com/articles/d41586-022-01332-8 "Any single analysis hides an iceberg of uncertainty. Multi-team analysis can reveal it. A typical journal article contains the results of only one...