Ron W. Storm’s research while affiliated with Western University and other places

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Publications (1)


Tracking multiple independent targets: Evidence for a parallel tracking mechanism*
  • Article

February 1988

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373 Reads

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1,848 Citations

Spatial Vision

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Ron W. Storm

There is considerable evidence that visual attention is concentrated at a single locus in the visual field, and that this locus can be moved independent of eye movements. Two studies are reported which suggest that, while certain aspects of attention require that locations be scanned serially, at least one operation may be carried out in parallel across several independent loci in the visual field. That is the operation of indexing features and tracking their identity. The studies show that: (a) subjects are able to track a subset of up to 5 objects in a field of 10 identical randomly-moving objects in order to distinguish a change in a target from a change in a distractor; and (b) when the speed and distance parameters of the display are designed so that, on the basis of some very conservative assumptions about the speed of attention movement and encoding times, the predicted performance of a serial scanning and updating algorithm would not exceed about 40% accuracy, subjects still manage to do the task with 87% accuracy. These findings are discussed in relation to an earlier, and independently motivated model of feature-binding--called the FINST model--which posits a primitive identity maintenance mechanism that indexes and tracks a limited number of visual objects in parallel. These indexes are hypothesized to serve the function of binding visual features prior to subsequent pattern recognition.

Citations (1)


... These methods have been used to assess the alertness levels of study subjects, for example, to study the association between smartphone usage behaviour and corresponding reaction times throughout the day [11]. Other cognitive assessment tasks consist of the Go-NoGo (GNG) [32] and the Multiple Object Tracking (MOT) [33]. GNG includes an assessment of decision-making abilities, and MOT measures the ability to focus on multiple stimuli in a split-attention scenario. ...

Reference:

Cognitive Performance Measurements and the Impact of Sleep Quality Using Wearable and Mobile Sensors
Tracking multiple independent targets: Evidence for a parallel tracking mechanism*
  • Citing Article
  • February 1988

Spatial Vision