Laboratory

in sensory physiology

We are investigating perceptual decision making in non-human primates performing two-alternative forced choice visual tasks. Reaction time and response data are modelled using drift diffusion model (Ratcliff 1978), which assumes stochastic accumulation of evidence on each trial leading to a decision. Parameters estimated from fitting the model help us understand the neural process behind perceptual decision making. We are comparing model parameters for two visual motion stimuli: structure-from-motion rotating cylinder (3D) and randomly moving dots (2D) and between individuals of the two species.