The TPT main effect was highly significant regardless of the data set used (full data set: F 10,370 = 37.6, p<1×10 −12 ; limited data set: F 10,370 = 30.7, p<1×10 −12 ), clearly indicating the significance of the online compensatory adjustments of F1 in response to the AF perturbations when the data were collapsed across the two groups of subjects.
On average, the PWS group showed a greater proportion of trials in the unresponsive category compared to the PFS, but this difference only approached significance (p = 0.086).
Similar results were found for the limited data set: 15 of the 21 PWS (71%) and 16 of the 18 PFS (89%) were determined as significantly compensating, and the between-group difference in the percentage of non-compensating subjects also did not reach statistical significance (p = 0.25).