Cognition and Perception Commons^™

When Red Lights Look Yellow, Joanne M. Wood, David A. Atchison, Alex Chaparro

Publications

Purpose. Red signals are typically used to signify danger. This study was conducted to investigate a situation identified by train drivers in which red signals appear yellow when viewed at long distances (∼900 m) through progressive-addition lenses.

Methods. A laboratory study was conducted to investigate the effects of defocus, target size, ambient illumination, and surround characteristics on the extent of the color misperception of train signals by nine visually normal participants. The data from the laboratory study were validated in a field study by measuring the amounts of defocus and the distances at which the misperception of the color of …

K-Means Clustering With Multiresolution Peak Detection, Guanshan Yu, Leen-Kiat Soh, Alan B. Bond

Avian Cognition Papers

Clustering is a practical data mining approach of pattern detection. Because of the sensitivity of initial conditions, k-means clustering often suffers from low clustering performance. We present a procedure to refine initial conditions of k-means clustering by analyzing density distributions of a data set before estimating the number of clusters k necessary for the data set, as well as the positions of the initial centroids of the clusters. We demonstrate that this approach indeed improves the accuracy and performance of k-means clustering measured by average intra to interclustering error ratio. This method is applied to the virtual ecology project to …

A Child’S Dance Of The Sankofa: Redefining, Reconstructing, And Reclaiming Identity, Shawnrey Notto

Independent Study Project (ISP) Collection

The following research focuses on a major health crisis that exists within the black Brazilian population, that of identity and self esteem. The study will deals with the possibility of reconstructing black identity, through dance. Children are being socialized into a society whose system practically equivocates anything of Afro-descent, anything black, with negativity. This is a serious problem that is cultivated in a culture of violence, which is profoundly detrimental to the social and psychological development of a people. As such this is an offense to human kind. By using participant-observation and interviews the research traces how some empowerment, consciousness, …

Examining The Time Course Of Indexical Specificity Effects In Spoken Word Recognition, Conor T. Mclennan, Paul A. Luce

Psychology Faculty Publications

Variability in talker identity and speaking rate, commonly referred to as indexical variation, has demonstrable effects on the speed and accuracy of spoken word recognition. The present study examines the time course of indexical specificity effects to evaluate the hypothesis that such effects occur relatively late in the perceptual processing of spoken words. In 3 long-term repetition priming experiments, the authors examined reaction times to targets that were primed by stimuli that matched or mismatched on the indexical variable of interest (either talker identity or speaking rate). Each experiment was designed to manipulate the speed with which participants processed the …

Actantial Analysis Greimas’S Structural Approach To The Analysis Of Self-Narratives, Yong Wang, Carl W. Roberts

Department of Sociology Faculty Scholarship and Creative Works

This paper introduces a formal procedure for analyzing narratives that was developed by the French/Lithuanian structuralist, A. J. Greimas. The focus is on demonstrating the utility of Greimas's ideas for analyzing one aspect of personal narratives: identity-construction. Reconstructing the basic actantial structure from self-narratives is shown to provide cues to power differentials among actants as perceived by the narrator. Distinguishing narrated events along conflict versus communication axes helps the analyst determine whether an experiential or a discursive domain is of primacy for the narrator. Moreover, investigation of communicative outcomes can be used to validate (or invalidate) findings on power relations. …

Spoken Word Recognition: The Challenge Of Variation, Paul A. Luce, Conor T. Mclennan

Psychology Faculty Publications

No abstract provided.

A Context-Dependent Model Of Proximity In Physically Situated Environments, John D. Kelleher, Geert-Jan M. Kruijff

Conference papers

The paper presents a computational model for a context-dependent analysis of a physical environment in terms of spatial proximity. The model provides a basis for grounding linguistic analyses of spatial expressions in visual perception. The model uses potential fields to model spatial proximity. It has been implemented, and when combined with a handcrafted grammar, is used to enable a conversational robot to carry out a situated dialogue with a human. The key concept in our approach is defining the region that is proximal to a landmark based on the spatial configuration of other objects in the scene. The model extends …

Examining User Acceptance Of Computer Technology: An Empirical Study Of Student Teachers, Will W.K. Ma, Robert Andersson, Karl-Oslear Streith

Support & Other Units (THEi)

The use of computer technology in schools has made slow progress since the mid-1980s even though governments have been generous in funding. It is therefore important to understand how and when teachers use computer technology in order to devise implementation strategies to encourage them. This study investigates student teachers' perceptions of computer technology in relation to their intention to use computers. The purpose is to shed light on more effective ways to motivate the use of computer technology in schools. Based on an expanded variation of the Technology Acceptance Model, 84 completed surveys of student teachers were collected at …

Dissociable Aspects Of Mental Workload: Examinations Of The P300 Erp Component And Performance Assessments, Carryl L. Baldwin, Joseph T. Coyne

Psychology Faculty Publications

Advanced technologies have enabled the choice of either visual or auditory formats for avionics and surface transportation displays. Methods of assessing the mental workload imposed by displays of different formats are critical to their successful implementation. Towards this end a series of investigations were conducted with the following aims: 1) developing analogous auditory and visual versions of a secondary task that could be used to compare display modalities; and 2) to compare the sensitivity of neurophysiological, behavioral and subjective indices of workload. Experiments 1 and 2 confirmed that analogous auditory and visual secondary oddball discrimination tasks were of equivalent difficulty …