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Contrast sensitivity throughout adulthood
Previous studies of spatial contrast sensitivity in adulthood have produced conflicting results. To clarify the situation, we measured contrast sensitivity functions on a large sample of adults (n =… Expand
Mutual repulsion between moving visual targets.
When two spatially intermingled sets of random dots move in different directions, the direction of each set may be misperceived. Observers report that each set of dots appears to move in a direction… Expand
Sound alters visual motion perception
Coherent global motion percepts from stochastic local motions
We studied the percept of global, coherent motion with dynamic random dot kinematograms whose elements took independent, random walks of constant step size; their directions of displacement were drawn from a uniform distribution. Expand
Direction-specific improvement in motion discrimination
With training, an observer's ability to discriminate similar directions of motion gradually improves. A series of studies reveals that this improvement, (1) is restricted to the trained direction and… Expand
A specific and enduring improvement in visual motion discrimination.
Training improves the ability of human observers to discriminate between two similar directions of motion. This gradual improvement is specific to the direction on which an observer is trained, and… Expand
Visual localization: age and practice.
Older people seem to be highly susceptible to the distracting effects of irrelevant or interfering visual stimuli. We studied this susceptibility using visual displays in which observers had to… Expand
The effects of aging on motion detection and direction identification
Random dot cinematograms were used to probe motion perception in human observers ranging from 23 to 81 years of age. Stimuli were either broadband directional Noise, which produces no experience of… Expand
Recognizing spatial patterns: a noisy exemplar approach
Models of categorization typically rely on the use of stimuli composed of well-defined dimensions (e.g., Ashby & Maddox (1998) in Choice, decision, and measurement: Essays in honor of R. Duncan Luce,… Expand
Human theta oscillations exhibit task dependence during virtual maze navigation
- M. Kahana, R. Sekuler, J. Caplan, M. Kirschen, J. Madsen
- Computer Science, Medicine
- 24 June 1999
Theta oscillations (electroencephalographic activity with a frequency of 4–8Hz) have long been implicated in spatial navigation in rodents,; however, the role of theta oscillators in human spatial navigation has not been explored. Expand