Stereoscopic Stimulus Presentation and Eye Tracking

Experimental control was performed using the REC-GUI software (RRID:SCR_019008) (Kim et al., 2019 (link)). Stimuli were rendered using Psychtoolbox 3 (MATLAB R2016b; NVIDIA GeForce GTX 970) and rear-projected onto a polarization preserving screen (Stewart Film Screen, Inc) using a DLP LED projector (PROPixx; VPixx Technologies, Inc) with 1280 × 720 pixel resolution (70° × 43° of visual angle) at 240 Hz. A circular polarizer was used to sequence the presentation of stereoscopic ‘half-images’ to each eye (120 Hz/eye). Polarized glasses were worn. A phototransistor circuit was used to confirm the synchronization of the left and right eye images as well as align neuronal responses to the stimulus onset. Eye tracking was performed optically at 1 kHz (EyeLink 1000 plus, SR Research). The monkeys sat 57 cm from the screen.

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Doudlah R., Chang T.Y., Thompson L.W., Kim B., Sunkara A, & Rosenberg A. (2022). Parallel processing, hierarchical transformations, and sensorimotor associations along the ‘where’ pathway. eLife, 11, e78712.

Publication 2022

GeForce GTX 970 PROPixx EyeLink 1000 plus

Glasses Monkeys Neuronal

Corresponding Organization :

Other organizations : University of Wisconsin–Madison, National Defense Medical Center, WiSys

Top 5 similar protocols

Variable analysis

independent variables

REC-GUI software (RRID:SCR_019008)

dependent variables

Neuronal responses to the stimulus onset

control variables

Psychtoolbox 3 (MATLAB R2016b; NVIDIA GeForce GTX 970)
Polarization preserving screen (Stewart Film Screen, Inc)
DLP LED projector (PROPixx; VPixx Technologies, Inc) with 1280 × 720 pixel resolution (70° × 43° of visual angle) at 240 Hz
Circular polarizer to sequence the presentation of stereoscopic 'half-images' to each eye (120 Hz/eye)
Polarized glasses
Phototransistor circuit to confirm the synchronization of the left and right eye images and align neuronal responses to the stimulus onset
Eye tracking at 1 kHz (EyeLink 1000 plus, SR Research)
Monkeys sitting 57 cm from the screen

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