Please refer to the LNCD Github Repository
Spectral data were computed for every electrode from the 3000 – 4000 ms window of the delay epoch of the task to avoid artifact from preceding eye movements and preparation from an imminent response, and from the 1 second inter-trial fixation epoch. The spectrograms of the data were calculated from 20 to 70 Hz by convolving the signals with a complex Morlet wavelet (Qin and Shen, 2000) with 7 cycles (Shin et al. 2017). Time-frequency representations of power (TFR) were calculated as the squared magnitude of the complex wavelet-convolved data. The TFR was normalized to the median power value for each frequency band, derived from all the power values within the identified stimulus windows of the delay and fixation epochs. Normalized TFR values were calculated in factors of median (FOM) for each frequency, separately for each participant/trial.