P-Values, Statistical Significance & Effect Size | AP Psych Unit 0

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P-values, statistical significance, effect size, and descriptive vs. inferential statistics explained for AP Psychology Unit 0, including the 0.05 cutoff and effect size benchmarks you need for the exam. Aligned with the current AP® Psychology Course and Exam Description. Free mastery questions for this video:

Max’s new medication beat the placebo, 11 points to 5. But was it real, or just luck? And even if it’s real, is the effect big enough to matter?

Chapters
0:00 Max’s medication study
0:32 Could it just be luck?
1:23 Sample size, gap size & variability
1:53 What is a p-value?
3:00 The 0.05 cutoff: statistical significance
3:25 Retesting with 10,000 participants
3:50 Effect size
5:01 Effect size benchmarks
5:47 Descriptive vs. inferential statistics

Part of AnimatedPsych’s free AP® Psychology course, Unit 0: Scientific Practices.

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