Experimental Design in Psychology: 3 Types With Examples In a between-subjects experiment, one group of people judged the number 9 to be significantly larger than another group judged 221 (Birnbaum, 1999). Kathy Brodie September 25, 2026
Statistical Significance: P-values, Errors & Effect Sizes Guide Master statistical significance with our comprehensive guide to p-values, Type I/II errors, and effect sizes for evidence-based decisions. Kathy Brodie August 31, 2025