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Table 3 Difference between pre and post- intervention scores on MESSIER scales (N = 30)

From: Effect of a classroom-based intervention on the social skills of pupils with intellectual disability in Southwest Nigeria

MESSIER scale Pre-intervention mean (SD) Post-intervention mean (SD) Mean difference t p
Positive verbal 11.9 (5.3) 14.4 (6.6) 2.57 1.94 0.063
Positive nonverbal 22.7 (8.1) 21.8 (7.5) 0.97 0.98 0.338
General positive 33.8 (12.2) 37.4 (10.2) 3.53 2.87 0.008
Total positive 68.1 (23.9) 73.2 (19.0) 5.10 1.92 0.364
Negative verbal 17.4 (5.8) 18.8 (9.0) 8.71 0.92 0.364
Negative nonverbal 19.8 (7.6) 22.6 (10.1) 2.80 1.60 0.121
General negative 18.8 (6.0) 19.47 (7.2) 0.67 0.66 0.517
Total negative 57.0 (16.7) 59.9 (19.4) 2.90 0.90 0.378
Overall total 126.6 (17.9) 136.0 (20.9) 9.34 3.71 0.001
  1. The significant value (p < 0.05) is in italic
  2. MESSIER Matson evaluation of social skills for individuals with severe retardation