Theories of perceptual decision making have been dominated by the idea that evidence accumulates in favor of different alternatives until some fixed threshold amount is reached, which triggers a decision. Recent theories have suggested that these thresholds may not be fixed during each decision but change as time passes. These collapsing…

This study aimed to evaluate spatial function in subjects with Williams syndrome (WS) by using a large-scale task with multiple rewards and comparing the spatial abilities of WS subjects with those of mental age-matched control children. In the present spatial task, WS participants had to explore an open space to search nine rewards placed in…

Aged dogs exhibit a spectrum of cognitive abilities including a syndrome similar to Alzheimer's disease. A major impediment to research so far has been the lack of a quick and accurate test of visuospatial memory appropriate for community-based animals. We therefore report on the development and validation of the Canine Sand Maze. A 4.5-m-diameter…

Factor analysis of survey data from 209 administrators and 384 faculty at six Tennessee state universities identified six distinctive attitudes concerning research orientation; teaching orientation; rewards influence research; rewards influence teaching; personal interest; and mission of the university. Analysis revealed that administrators…

A STUDY, IN PROGRESS, IS ATTEMPTING TO DETERMINE THE INTERACTION OF VARIOUS REWARD CONDITIONS AND VARIOUS TYPES OF PRESCHOOL EXPERIENCE WITH DISCRIMINATION LEARNING. THE SUBJECTS ARE 240 4- AND 5-YEAR-OLD CHILDREN WITH THREE TYPES OF PRESCHOOL EXPERIENCE--1 TO 3 MONTHS OF HEAD START, 10 TO 12 MONTHS OF HEAD START, AND NO ATTENDANCE IN A PRESCHOOL…

This document includes reports on four subjects relevant to planned and unplanned aspects of occupational choices by youth. (1) "Toward a Morphology of Occupational Choice," by Robert A. Ellis and others, discusses intrinsic features and extrinsic rewards of work, extra-role considerations, and goal perception as major influences on occupational…