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Table 4 Between-group differences for the visual processing measures

From: Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study

  ASD (n = 17) TD (n = 17) Group test statistic p value Cohen’s d
  M SD M SD
Fragmented Objects Outline Task (ms) a 4335 1252 4031 919 F = 0.91 .35 0.31
Coherent Motion Task (% coherence) 29 12 24 11 F = 2.02 .17 0.48
Visual search task (ms) b 2075 505 1825 295 F = 2.93 .09 0.52
 Low similarity c 1792 421 1677 295 t = 0.72 .47 0.25
 High similarity c 2360 634 1973 381 t = 2.51 .017 0.72
ROCF fragmentation score 5.4 2.1 4.2 2.8 F = 1.76 .19 0.46
  1. Note. Since the groups were compared on four tasks, a Bonferroni correction results in a significance level (α) of 0.0125
  2. aOther effects retained in the model for Fragmented Objects Outline Task: within-subject factors type (F(1,1279) = 13.07, p < .001) and homogeneity (F(1,1279) = 54, p = < .001)
  3. bOther effects retained in the model for visual search: within-subject factors target-distractor similarity (F(1,1285) = 86.07, p < .001), number of distractors (F(1,1285) = 57.67, p < .001), and the interaction between group and target-distractor similarity (F(1,1285) = 7.68, p = .006)
  4. cTukey-Kramer correction was performed for group contrasts for the specific levels of a within-subject factor