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Table 1 Results for ‘thermometer’-study

From: The significance fallacy in inferential statistics

  Actual a ‘Significant’ (n = 53) ‘Non-significant’ (n = 73) (z-value) p-value Effect size
N 33 76 50 (z =-1.75) p = .08 r = -.15
M group1 5.12 2.70 3.50   
M group2 4.13 4.05 4.00   
Mdiff 0.99 2.00 1.00 (z =-5.27) p < .001 r = -.47
SD group1 1.22 1.00 1.25   
SD group2 1.41 8.00 10.00   
Cohen’s d 0.78b 0.60 0.30 (z =-3.88) p < .001 r = -.34
  1. Note. aThe actual study reported a significant effect. Attempts to replicate the effect of temperature on social relations within the Many Labs Replication Project have failed, however [54].
  2. bCohen’s d = .78 is reported in the paper. Calculating effect size from means and standard deviations using the Campbell effect size calculator available at http://www.campbellcollaboration.org/resources/effect_size_input.php results in d = .75, 95% C.I = [0.05; 1.46].