Cognition and Perception Commons^™

Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref

Dissertations and Theses

In dynamic environments, split-second sensorimotor decisions must be prioritized according to potential payoffs to maximize overall rewards. The impact of relative value on deliberative perceptual judgments has been examined extensively, but relatively little is known about value-biasing mechanisms in the common situation where physical evidence is strong but the time to act is severely limited. This research examines the behavioral and electrophysiological indices of how value biases split-second perceptual decisions and the possible mechanisms underlying the process. In prominent decision models, a noisy but statistically stationary representation of sensory evidence is integrated over time to an action-triggering bound, and value-biases …

Syntax And Semantics Of Perceptual Representation, James K. Quilty-Dunn

Dissertations, Theses, and Capstone Projects

This dissertation is a defense of perceptual pluralism, the thesis that perceptual systems deliver multiple types of representations including those used in thought. In particular, it argues that perceptual systems output iconic (i.e., image-like, analog) representations as well as discursive (i.e., language-like, digital) states. A central thesis is that perceptual representations of objects are propositional and composed of concepts. It also develops a compositional syntax of iconic representation called the coordination model, according to which icons are sets of primitive parts, each of which determines values along multiple analog feature dimensions simultaneously. The dissertation supports the conclusion that perceptual …

Consciousness, Perception, And Short-Term Memory, Henry F. Shevlin

Dissertations, Theses, and Capstone Projects

Dissertation Abstract: Consciousness, Perception, and Short-Term Memory

When we engage in almost any perceptual activity – recognizing a face, listening out for a phone-call, or simply taking in a sunset – information must be briefly stored and processed in some form of short-term memory. For philosophers attempting to develop an empirically grounded account of perception and conscious experience, it is therefore crucial to engage with scientific theories of the kinds of short-term memory mechanisms that underlie our moment-to-moment retention of information about the world. To that end, in this dissertation I review recent scientific evidence for a new form of …