Perception and Psychophysics

Covers all areas of research in sensory processes, perception, attention, and psychophysics. Includes reports on experimental work, reviews, and issue commentary important to researchers.

Articles from Vol. 68, No. 4, May

Active Heading Control in Simulated Flight Based on Vertically Extended Contours
In two experiments, we manipulated the properties of 3-D objects and terrain texture in order to investigate their effects on active heading control during simulated flight. Simulated crosswinds were used to introduce a rotational component into the...
A Sex Difference in Visual Influence on Heard Speech
Reports of sex differences in language processing are inconsistent and are thought to vary by task type and difficulty. In two experiments, we investigated a sex difference in visual influence on heard speech (the McGurk effect). First, incongruent consonant-vowel...
Attentional Blink and Attentional Capture: Endogenous versus Exogenous Control over Paying Attention to Two Important Events in Close Succession
Identification of the second of two targets is impaired if it is presented less than about 500 msec after the first. This attentional blink (AB) occurs under dual-task conditions in which observers are required to report both targets. AB magnitude has...
Brightness for Different Surround Conditions: The Effect of Transient Glare
We measured the effect of a transient glare source on the perceived brightness of a standard luminance (L^sub STD^) patch (0.5 cd/m^sup 2^) as a function of the surround luminance (L^sub S^). In the experiment, both increment and decrement stimuli were...
Comparing View Sensitivity in Shape Discrimination with Shape Sensitivity in View Discrimination
In three picture-picture matching experiments, the effects of a view change on our ability to detect a shape change (Experiments 1 and 2) were contrasted with the effects of a shape change on our ability to detect a view change (Experiment 3). In each...
Dissociating the Effects of Similarity, Salience, and Top-Down Processes in Search for Linearly Separable Size Targets
In two experiments, we explored the role of foreknowledge on visual search for targets defined along the size continuum. Targets were of large, medium, or small size and of high or low similarity relative to the distractors. In Experiment 1, we compared...
Environmental Context Influences Visually Perceived Distance
What properties determine visually perceived space? We discovered that the perceived relative distances of familiar objects in natural settings depended in unexpected ways on the surrounding visual field. Observers bisected egocentric distances in a...
Measures of Sensitivity Based on a Single Hit Rate and False Alarm Rate: The Accuracy, Precision, and Robustness of D', A^sub Z^, and A'
Signal detection theory offers several indexes of sensitivity (d', A^sub z^, and A') that are appropriate for two-choice discrimination when data consist of one hit rate and one false alarm rate per condition. These measures require simplifying assumptions...
Perceiving Depth in Point-Light Actions
The present study investigates how observers assign depth in point-light figures, by manipulating spatiotemporal characteristics of the stimuli. Previous research on the perception of point-light walkers revealed bistability (i.e., that a point-light...
Perception of Biological Motion from Limited-Lifetime Stimuli
The visual perception of human movement from sparse point-light walkers is often believed to rely on local motion analysis. We investigated the role of local motion in the perception of human walking, viewed from the side, in different tasks. The motion...
Perceptual Restoration in Toddlers
Perception by adults is a constant interaction between the top-down effects of prior knowledge and the effects of bottom-up perceptual information. One obvious example of this interaction is the perceptual restoration effect, in which adult listeners...
Reaching with Alien Limbs: Visual Exposure to Prosthetic Hands in a Mirror Biases Proprioception without Accompanying Illusions of Ownership
In five experiments, we investigated the effects of visual exposure to a real hand, a rubber hand, or a wooden block on reaching movements made with the unseen left hand behind a parasagittal mirror. Participants reached from one of four starting positions,...
The Role of Attention and Familiarity in Face Identification
How is attention allocated during face identification? Previous work using famous and unfamiliar faces suggests that either no attention or a special attentional mechanism is required. We used a conventional attentional blink (AB) procedure to measure...
Vertical-Horizontal Illusion Present for Sighted but Not Early Blind Humans Using Auditory Substitution of Vision
This experiment was undertaken to investigate the effect of sensory modality (vision vs. audition) and of visual status (early blind vs. sighted) on susceptibility to the vertical-horizontal illusion. Early blind volunteers and blindfolded sighted subjects...
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