Statistical test | Variation in intercept | ||
---|---|---|---|
Absent | Present | ||
Statistical power a | |||
Study 1a | Study 1b | ||
Variation in experimental effect | |||
Absent | T test ind. obs. T test summary st. Multilevel analysis I Multilevel analysis II | Correct Decreased power Correct Correct | Decreased power Decreased power Correct Correct |
False positive rate | |||
Study 2a | Study 2b | ||
Present | T test ind. obs T test summary st. Multilevel analysis I Multilevel analysis II | Increased false positive rate Correct Increased false positive rate Correct | Increased false positive rate Correct Increased false positive rate Correct |