NTED

This study investigated neural mechanisms underlying working memory by employing a visual n-back task with graded cognitive load (0-back to 3-back). Ten healthy volunteers (6 males, 4 females; mean age 23.3 ± 0.9 years) participated, performing a spatial matching task where they judged whether the current position of a displayed square matched the position presented n trials earlier, responding via keypress (V for match, N for non-match). EEG signals were recorded using a NeuroScan system with SynAmps2 amplifiers at a 1,000 Hz sampling rate, following the 10-20 international electrode placement standard. The experimental design leveraged positional matching across incremental memory loads to dissociate cognitive effort and generate standardized behavioral and neural datasets.