Electroencephalography of the Trail Making Test 1

It is hypothesized that the spatial patterns of electrode activation are significantly different 1) across Trail Making Test parts with a left frontal lateralization, consistent with previous functional neuroimaging literature investigating a similar study population; and 2) across time periods with significantly different aspects of performance during each TMT part, such as visual search and linking behaviour, as quantified from tablet-based kinematic metrics. The dataset contains both the behavioural and EEG data, which were collected during tablet-based TMT experiments. The behavioural data contains tablet coordinate logs, whereas the EEG data contains the raw signals collected during the test. The behavioural data can be interpreted by computing metrics such as seconds per link (SPL) and speed of the stylus during TMT performance. After appropriate preprocessing, the EEG data can be interpreted through time-frequency analysis, and partial least squares regression. The behavioural data shows a strong effect of TMT Part A and B was observed on the SPL value as expected (Part B showing reduced SPL value); whereas the EEG results indicated robust effects of linking and non-linking periods in multiple frequency bands, and effects consistent with the underlying cognitive demands of the test. This is the first half of the compressed data.