Geforce gtx 750

Stimuli were presented on a 27-inch back-lit TFT monitor (iiyama G2773HS) with a fast response time of nominally 1 ms and a vertical refresh rate of 120 Hz, using a standard Linux-PC (Ubuntu 14.04 LTS) with a dedicated graphics board (nVidia GeForce GTX 750). Stimulus presentation was controlled by a custom-written C-program, which also acquired responses from a custom-built response box that was monitored via the parallel port with a temporal resolution of 1,000 Hz. The synchrony between all temporally critical parameters, such as the refresh rate of the monitor, the response time of the box and the uptake-time of the program were controlled and verified using trigger signals, photo-sensitive LEDs and a clock-pulse generator in conjunction with an oscilloscope.
Subjects were seated in a dimly lit room and viewed the stimuli from a distance of 57 cm.

The visual stimuli were presented on a 17″ monitor (Compaq 9500) with a resolution of 1280*1024 pixels (Graphic Card NVIDIA Geforce GTX 750) and the distance between the participant and the screen was ~ 75 cm. All auditory stimuli had a 44,100-Hz sampling rate with a 32-bit resolution. The audio card was a SPDIF out Creative SB X Ti. The used headphones were a pair of Sennheiser HD 280 pro. Presentation software (Neurobehavioral systems, Albany, CA, USA) was used to present the stimuli and record participants’ responses.