Table 3 Means (M) and standard errors (SE) for parieto-occipital alpha ERD/S (in %) per hemisphere (left, right), group (programmers, non-programmers) and complexity level (low, medium, high) of each task (NIR, FIR, and VDR).

FIR

Low

19

− 36.64 (6.22)^a,b

− 38.35 (5.55)^{d, e}

17

− 56.07 (6.29)

− 51.52 (6.65)

Medium

19

− 52.11 (5.93)^{a, c}

− 54.50 (6.04)^{d, f}

17

− 61.05 (6.16)

− 56.24 (6.12)

High

19

− 59.75 (3.90)^{b, c}

− 58.88 (5.03)^{e, f}

17

− 64.56 (4.27)

− 58.62 (5.26)

NIR

Low

18

− 43.99 (4.16)

-46.80 (4.49)

19

− 58.73 (5.25)

− 52.08 (5.21)

Medium

18

− 52.08 (4.41)

− 54.23 (4.16)

19

− 60.69 (4.38)

− 57.01 (4.26)

High

18

− 51.79 (5.01)

− 57.01 (4.04)

19

− 63.34 (4.11)

− 57.51 (4.63)

VDR

Low

20

− 31.35 (7.50)

− 35.21 (7.59)

21

− 39.62 (7.17)

− 32.70 (7.50)

Medium

20

− 45.78 (5.57)

− 46.74 (5.92)

21

− 52.23 (6.29)

− 47.34 (6.57)

High

20

− 41.16 (6.40)

− 40.88 (6.98)

21

− 55.19 (5.02)

− 51.02 (5.37)