Countermanding Perceptual Decision-Making

The Phantom Decoy Effect in Perceptual Decision-making 1 RUNNING HEAD: The Phantom Decoy Effect in Perceptual Decision-making The Phantom Decoy Effect in Perceptual Decision-making

A phantom decoy is an alternative that is superior to another “target” option, but is unavailable at the time of choice. In value-based decisions involving phantom decoys (e.g., consumer choices), individuals often show increased preference for the similar, inferior target option over a non-dominated competitor alternative. Unlike value-based decisions that are driven by subjective goals, perce...

Oscillatory Network Dynamics in Perceptual Decision-Making

Synchronized oscillations of ensembles of neurons in the brain underlie human cognition and behaviors. Neuronal network oscillations can be described by the physics of coupled dynamical systems. This dissertation examines the dynamic network activities in two distinct neurocognitive networks, the salience network (SN) and the ventral temporal cortex-dorsolateral prefrontal cortex (VTC-DLPFC) ne...

Neural Mechanisms of Perceptual Decision Making

Neural Stochastic Dynamics of Perceptual Decision Making

Recent studies have identified some brain regions involved in the decision process for simple perceptual tasks, and have provided insight into how sensory information is evaluated before the commitment to a motor response. To understand the dynamical principles of the decision process, and how they emerge from the interaction of interconnected neurons, computational models have been proposed ba...

Neurally constrained modeling of perceptual decision making.

Stochastic accumulator models account for response time in perceptual decision-making tasks by assuming that perceptual evidence accumulates to a threshold. The present investigation mapped the firing rate of frontal eye field (FEF) visual neurons onto perceptual evidence and the firing rate of FEF movement neurons onto evidence accumulation to test alternative models of how evidence is combine...