Be Aware Of Ro3280 Challenges And Best Ways To Identify It

The word disappeared when a response was registered and was followed by the reappearance of the fixation dot. Feedback was only given in the first 18 trials by changing the color of the fixation dot for 500 ms (red = incorrect response, green = correct, and blue = too late). Participants were asked to minimize blinks and eye-movements, and maintain steady fixation centered at the words. The participants took a 10-s break every 60 trials and a long break of 3 min halfway through the Stroop task. EEG acquisition and analysis Electrophysiological data were recorded with 32 active Bio-Semi electrodes. Most Selleck 3-deazaneplanocin A electrodes were placed over posterior brain areas, where the classic P3 is largest in amplitude (see Figures 2C�CE). We placed the reference electrodes at the mastoids and four additional electrodes around the eyes (below and above the right eye, left of the left eye, and right of the right eye) to detect blinks and eye-movement artifacts. The data were recorded at 1024 samples per second in the program ActiView and analyzed in MatLab using the FieldTrip (Oostenveld et al., 2011) and EEGLAB (Delorme and Makeig, 2004) toolboxes. During acquisition, impedances were kept below 30 k��. Each electrode was measured on-line with respect to a common mode sense active electrode producing a monopolar channel. EEG data were re-referenced to the average of the left and right Erastin ic50 mastoid electrodes. Next, data were epoched from 2 s before until 3 s after stimulus onset, high-pass filtered at 1 Hz and low-pass filtered at 60 Hz with a conventional Butterworth filter, and baseline-corrected to the 200-ms interval preceding stimulus onset. Ocular and eye-blink artifacts were detected Ro3280 and removed using the independent component analysis method implemented in FieldTrip. Epochs with excessive signal variance due to transient artifacts were discarded (M = 5% of the trials, SD = 3%). Stimulus-locked ERP waveforms were obtained by averaging epochs separately for color and word stimuli. P3 latency was defined as the last positive ERP peak between 200 and 300 ms after stimulus onset. FIGURE 2 Behavioral and electrophysiological results of Experiment 1. The bar graph with mean and standard error of reaction times shows that incongruent trials induced significantly slower responses (??p