The human gut is host to a community of microbes (bacteria, archaea, fungi, viruses and phages) referred to as the gut microbiota, with their combined functions known as the gut microbiome 1. Since ...

Across contemporary cardiovascular clinical trials, the estimates of expected event rates and effect sizes that investigators use to calculate sample sizes—and funding requirements—often come in ...

Basic concepts in hypothesis testing, including effect sizes, type I and type II errors, calculation of statistical power, non-centrality parameter, and applications of these concepts to twin studies.

Empirical research in psychology aims to produce reliable evidence that not only enhances our understanding of human behavior but also supports the development of effective interventions. The notion ...