Theo Rhodes

Publications (2)16.68 Total impact

• Source

  Available from: Michael Spivey

  Article: Drawing from memory: hand-eye coordination at multiple scales.

  Stephanie Huette, Christopher T Kello, Theo Rhodes, Michael J Spivey
  [show abstract] [hide abstract]
  ABSTRACT: Eyes move to gather visual information for the purpose of guiding behavior. This guidance takes the form of perceptual-motor interactions on short timescales for behaviors like locomotion and hand-eye coordination. More complex behaviors require perceptual-motor interactions on longer timescales mediated by memory, such as navigation, or designing and building artifacts. In the present study, the task of sketching images of natural scenes from memory was used to examine and compare perceptual-motor interactions on shorter and longer timescales. Eye and pen trajectories were found to be coordinated in time on shorter timescales during drawing, and also on longer timescales spanning study and drawing periods. The latter type of coordination was found by developing a purely spatial analysis that yielded measures of similarity between images, eye trajectories, and pen trajectories. These results challenge the notion that coordination only unfolds on short timescales. Rather, the task of drawing from memory evokes perceptual-motor encodings of visual images that preserve coarse-grained spatial information over relatively long timescales as well.
  PLoS ONE 01/2013; 8(3):e58464. · 4.09 Impact Factor
• Source

  Available from: Klaus Linkenkaer-Hansen

  Article: Scaling laws in cognitive sciences.

  Christopher T Kello, Gordon D A Brown, Ramon Ferrer-I-Cancho, John G Holden, Klaus Linkenkaer-Hansen, Theo Rhodes, Guy C Van Orden
  [show abstract] [hide abstract]
  ABSTRACT: Scaling laws are ubiquitous in nature, and they pervade neural, behavioral and linguistic activities. A scaling law suggests the existence of processes or patterns that are repeated across scales of analysis. Although the variables that express a scaling law can vary from one type of activity to the next, the recurrence of scaling laws across so many different systems has prompted a search for unifying principles. In biological systems, scaling laws can reflect adaptive processes of various types and are often linked to complex systems poised near critical points. The same is true for perception, memory, language and other cognitive phenomena. Findings of scaling laws in cognitive science are indicative of scaling invariance in cognitive mechanisms and multiplicative interactions among interdependent components of cognition.
  Trends in Cognitive Sciences 04/2010; 14(5):223-32. · 12.59 Impact Factor