2 guides

Research Methods

Internal vs. External Validity: A Student-Friendly Guide

Internal vs. external validity explained with plain-English definitions, classic examples, and a checklist you can use to evaluate any psychology study.

August 28, 2026 · 3 min readRead →

Research Methods▶ Video

Evaluating Psychology Studies: Validity, Variables, and Research Rigor

Master how to critically evaluate psychology research by exploring internal and external validity, operational definitions, confounding variables, and replication.

June 30, 2026 · 7 min readRead →