Pre-stimulus alpha band power and phase influence visual awareness--EEG dataset

Experimental materials: Experimental materials include threshold stimulus, super-threshold stimulus and blank stimulus. The threshold stimulus is a low-contrast sinusoidal Gabor patch at the threshold level, tilted vertically to the left or right by 45°, with Michelson contrast ratios of 0.01, 0.02 and 0.03, respectively (Michelson contrast is calculated by: The brightest brightness minus the darkest brightness divided by the sum of the two), the presentation time and contrast are determined in the measurement threshold stage. The super-threshold stimulus is the stimulus with higher contrast than the threshold stimulus (Michelson's contrast is 0.04), and the blank stimulus is the non-target stimulus. The experimental material is made from online-gabor-patch-generator. The background brightness of all these types of stimuli was 22cd/m2.The experiments were conducted in a quiet, dimly lit EEG laboratory. Experimental stimuli are presented in E-Prime 2.0 software. The resolution of the screen is 1024x768 pixels, and the screen refresh rate is 60Hz (1 refresh cycle is about 17ms). The subject is about 100cm away from the screen.EEG data were collected using the Curry7 software produced by NeuroScan, and EEG recording was performed by participants wearing an extended international 10-20 system 64 electrode cap. When recording online, the center electrode of the forehead is grounded (located at the midpoint of the FCZ and FX connections), and the overhead electrode is a reference electrode. The sampling rate is 1000Hz in DC mode. Electrodes were placed outside both eyes to record horizontal eye electricity (HEOG) and above and below the left eye to record vertical eye electricity (VEOG). The resistance was kept below 10kΩ.