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Table 3 Pretest and post-tests scores

From: A card game for the treatment of delusional ideas: A naturalistic pilot trial

  Pretest Mean (sd) Post-test Mean (sd) Effect size Cohen's d
Symptoms 8.71 (5.07) 7.56 (5.16) -.22
Anxiety 2.56 (1.23) 2.39 (1.32) -.13
Preoccupation 2.76 (1.04) 2.14 (1.23) -.54
Conviction 3.47 (1.18) 2.78 (1.57) -.50