clearly significantp = .004
Post‐hoc comparisons revealed that the difference in classification accuracy between V1–V3 ungrouped and V1–V3 grouped was at significance ( t = 3.53, p = .05), and clearly significant for V1–V3 grouped and IPS 1–5 grouped and for V1–V3 grouped and IPS excluding IPS 0–5 grouped (respectively t = 4.10, p = .004; t = 4.14, p = .003).