Greg L. Schrock

Learn More
Eye movements were monitored while participants performed a change detection task with images of natural scenes. An initial and a modified scene image were displayed in alternation, separated by a blank interval (flicker paradigm). In the modified image, a single target object was changed either by deleting that object from the scene or by rotating that(More)
The purpose of the present study was to investigate the degree to which foveal information is necessary for object identification. To explore this question, we used an artificial moving scotoma paradigm to eliminate a region of a currently viewed display in real time as a function of eye position. Subjects examined linear arrays of four line drawings of(More)
In this paper, we explore the increasingly significant role of human capital in regional development by presenting a number of hypotheses about the nature and extent of regional occupational specialization and exploring these with data analysis on national trends and on the Minneapolis/St. Paul metropolitan area. Nationally, we find that a region's(More)
As many other kinds of simulation experiments, simulations of computer networks tend to generate high volumes of output data. While the collection and the statistical processing of these data are challenges in and of themselves, creating meaningful visualizations from them is as much an art as it is a science. A sophisticated body of knowledge in(More)
Urban geographers conceptualize the distribution of economic activity across city systems in terms of hierarchy, where functions are related to size, and specialization, where places compete against each other for functional primacy. Using occupational data, we explore the salience of each for U.S. metropolitan areas. We find that large, urbanized places —(More)
  • 1