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Table 2 Working alliance in the two intervention groups: means, standard deviations, t test comparisons, and effect sizes.

From: The working alliance in a randomized controlled trial comparing online with face-to-face cognitive-behavioral therapy for depression

  Sample means    
  Online (N= 25) Face-to-Face (N= 28)    
Scales M SD n M SD n Test statistic p d
WAI-C mid-treatment          
   Tasks 5.82 .80 25 5.48 1.05 28 1.304 .19 0.36
   Bond 5.68 .99 25 5.39 1.01 28 1.045 .30 0.29
   Goals 5.95 .81 25 5.81 1.01 28 .545 .59 0.15
   Composite 5.82 .78 25 5.56 .91 28 1.085 .28 0.31
WAI-C post-treatment          
   Tasks 6.17 .80 25 5.66 1.18 27 1.811 .07 0.51
   Bond 5.91 .97 25 5.67 .95 28 .914 .36 0.25
   Goals 6.22 .79 25 5.98 1.01 28 .945 .35 0.26
   Composite 6.10 .77 25 5.76 .98 27 1.393 .16 0.39
WAI-T post-treatment          
   Tasks 6.16 .60 25 5.66 .89 28 2.362 .02* 0.66
   Bond 5.86 .90 25 5.79 1.14 28 .265 .79 0.07
   Goals 6.11 .71 25 5.98 1.00 28 .533 .59 0.15
   Composite 6.04 .67 25 5.80 .96 28 1.013 .31 0.29
  1. WAI-C = Working Alliance Inventory - Clients' ratings; WAI-T = Working Alliance Inventory - Therapists' ratings; 1 df = 46, 2 df = 47, 3 df = 48, 4 df = 49, 5 df = 50.
  2. * p < .05.