Quadro k620 graphics card

The eye-movement data were recorded with an EyeLink 1000 Plus (SR Research, Ontario, Canada) with a sampling rate of 1,000 Hz. All experimental materials were presented by using the EyeLink’s Experiment Builder software. A chin rest and head restraint minimized head movements, and participants wore headphones (HS-11 V stereo headphones with SilverLine microphone). The items were presented on a 24-inch LCD monitor (XL24II monitor, BenQ, Taipei, Taiwan; Quadro K620 graphics card, NVIDIA, Santa Clara, CA) with 1,024- × 768-pixel resolution and a refresh rate of 60 Hz. The threshold level for the voice key was defined as 0.1 audio level.

Pupillometry data were obtained using a video-based eye tracker (Eyelink-1000 plus, SR Research, Kanata, ON, Canada) with a sampling rate of 1000 Hz. The LTD was built and presented using EyeLink’s Experiment Builder software. Participants’ eyes were 57 cm from a 24-inch LCD monitor (XL24II monitor, BenQ, Taipei, Taiwan; Quadro K620 graphics card, NVIDIA, Santa Clara, CA, USA) with 1024- × 768-pixel resolution and a refresh rate of 60 Hz. Each block was preceded by calibration and validation to ensure reliable pupil-size data. To maintain an accurate measure of pupil size before, during, and after the visual stimulation and to avoid contamination by saccadic eye movements, participants were instructed to keep their eyes focused on the screen and avoid shifting their gaze throughout the session. To avoid extreme luminance changes, the same white text (RGB values = 255, 255, 255) on a gray background (RGB values = 128, 128, 128) was used for all stimuli.