Table 3.

Vertical eye movements

Group	Condition	Entire delay (0–5.0 s)	Start of delay (0–1.5 s)	Mid delay (1.5–3.5 s)	End of delay (3.5–5 s)
Low performers	1-item	30.2 ± 9.7	15.6 ± 5.2	7.8 ± 1.9	6.8 ± 4.0
Low performers	5-item	38.6 ± 10.6	20.4 ± 5.6	10.4 ± 4.5	7.8 ± 3.3
Low performers	5-item (D)	40.8 ± 13.1	21.6 ± 6.3	10.6 ± 3.8	8.6 ± 4.0
High performers	1-item	26.6 ± 9.1	14.8 ± 6.8	7.4 ± 3.0	4.4 ± 2.4
High performers	5-item	35.2 ± 5.4	20.6 ± 3.2	10.4 ± 2.9	6.0 ± 1.9
High performers	5-item (D)	41.4 ± 9.2	20.4 ± 4.5	12.6 ± 4.9	8.4 ± 2.8

The mean number of vertical eye movements (blinks) identified with independent component analysis during MEG recordings of DMS memory delays in NC1 (Study 1). There were no statistical differences in identified eye movements between memory load (1-item or 5-item) or distractor present (D) conditions and also, no differences between high or low memory performance groups (all p > 0.11); confirming that statistical comparisons of bifrontal theta coupling in NC1 were not notably influenced by eye movements during the MEG recordings.