Form Perception

71.

Visual perception: shaping what we see.

A new psychophysical study has examined the free flow of perception as observers viewed stimuli with several possible visual interpretations. The results suggest that our subjective impression of such ambiguous patterns may be more closely linked to the ...
David A Leopold (Curr Biol, 200301)
visual-perception-shaping-see.asp

72.

The distribution of preferred orientations in the peripheral visual field.

Orientation discrimination was measured for line targets in the fovea and in locations along four meridians (vertical, horizontal, 45 degrees and 135 degrees ) in the peripheral visual field. In all locations, the performance for vertical and horizontal ...
Gerald Westheimer (Vision Res, 200301)
distribution-preferred-orientations-peripheral-visual-field.asp

73.

Columns for complex visual object features in the inferotemporal cortex: clustering of cells with similar but slightly different stimulus selectivities.

Cells in the inferotemporal cortex (area TE) selectively respond to complex visual object features and those that respond to similar features cluster in a columnar region elongated vertical to the cortical surface. What are the functional roles of the ...
Keiji Tanaka (Cereb Cortex, 200301)
columns-complex-visual-object-features-inferotemporal-cortex.asp

74.

A fair test of the effect of a shadow-incompatible luminance gradient on the simultaneous lightness contrast.

Shadow-compatibility of simultaneous lightness contrast is discussed by Alexander D Logvinenko and Paola Bressan, with examples claiming to provide a test of the ...
Alexander D Logvinenko (Perception, 2003)
fair-test-effect-shadow-incompatible-luminance-gradient-simultaneous.asp

75.

Facial expression recognition in people with medicated and unmedicated Parkinsons disease.

Recognition of facial expressions of emotion was investigated in people with medicated and unmedicated Parkinsons disease (PD) and matched controls (unmedicated PD, n=16; medicated PD, n=20; controls, n=40). Participants in the medicated group showed ...
R Sprengelmeyer, A W Young, K Mahn, U Schroeder, D Woitalla, T Büttner, W Kuhn, H Przuntek (Neuropsychologia, 2003)
facial-expression-recognition-people-medicated-unmedicated-parkinson.asp

76.

Visuomotor priming by pictures of hand postures: perspective matters.

Observing hand postures interacts with the preparation of similar actions. This may be due to motor encoding of the observed displays and/or to enhanced visual processing induced by motor planning. We studied the effects of the observers perspective on ...
Stefan Vogt, Paul Taylor, Brian Hopkins (Neuropsychologia, 2003)
visuomotor-priming-pictures-hand-postures-perspective-matters.asp

77.

Detectability of onsets versus offsets in the change detection paradigm.

The human visual system is particularly sensitive to abrupt onset of new objects that appear in the visual field. Onsets have been shown to capture attention even when other transients simultaneously occur. This has led some authors to argue for the ...
Geoff G Cole, Robert W Kentridge, Angus R H Gellatly, Charles A Heywood (J Vis, 2003)
detectability-onsets-versus-offsets-change-detection-paradigm.asp

78.

Conscious visual representations built from multiple binding processes: evidence from neuropsychology.

I review neuropsychological evidence, from patients with selective brain lesions, indicating that there can be several kinds of binding in vision. Damage to early processes within the ventral visual stream impairs the binding of contours into shapes. ...
Glyn W Humphreys (Prog Brain Res, 2003)
conscious-visual-representations-built-multiple-binding-processes.asp

79.

Rapid extraction of emotional expression: evidence from evoked potential fields during brief presentation of face stimuli.

Although the emotional expression of faces is believed to be accessed rapidly, previous ERP studies hardly found correlates of these processes. Here, we report findings from a study that investigated dichoptic binocular interaction using emotional face ...
E Eger, A Jedynak, T Iwaki, W Skrandies (Neuropsychologia, 2003)
rapid-extraction-emotional-expression-evidence-evoked-potential.asp

80.

Is it an animal? Is it a human face? Fast processing in upright and inverted natural scenes.

Object categorization can be extremely fast. But among all objects, human faces might hold a special status that could depend on a specialized module. Visual processing could thus be faster for faces than for any other kind of object. Moreover, because ...
Guillaume A Rousselet, Marc J-M Macé, Michèle Fabre-Thorpe (J Vis, 2003)
animal-human-face-fast-processing-upright-inverted-natural-scenes.asp