Abstract
Participants viewed elongated rectangular displays in which two regions shared a central contour. In experimental stimuli, the central contour portrayed a known object on one, high-denotative, side. In control stimuli, no known objects were portrayed on either side of the central contour, but one side of each control stimulus was a scrambled version of one of the high- denotative regions, matching it on all factors known to influence scene segmentation other than object recognition. For each display, participants decided whether the left or the right region was more likely to be an object. Paradoxically, both right-hemisphere- (RH) and left-hemisphere- (LH) damaged individuals were more likely to see objects lying on the contralesional rather than the ipsilesional side of the central contour. This tendency is attributed to an object-centered attentional bias toward the central contour when objects lie on its contralesional side and away from the central contour when objects lie on its ipsilesional side. Object-centered attentional biases were stronger following RH than LH damage. Elderly control participants showed a slight bias in the same direction as RH-damaged individuals. More high-denotative regions than scrambled regions were seen as objects, even when object-centered attention was biased away from the central contour carrying the object recognition information. The latter result suggests that the object recognition processes contributing to scene segmentation are preattentive.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 357-370 |
| Number of pages | 14 |
| Journal | Psychobiology |
| Volume | 26 |
| Issue number | 4 |
| State | Published - Dec 1998 |
Fingerprint
ASJC Scopus subject areas
- Physiology
- Neuroscience(all)
Cite this
Object-centered attentional biases and object recognition contributions to scene segmentation in left- and right-hemisphere-damaged patients. / Peterson, Mary A; Gerhardstein, Peter C.; Mennemeier, Mark; Rapcsak, Steven Z.
In: Psychobiology, Vol. 26, No. 4, 12.1998, p. 357-370.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Object-centered attentional biases and object recognition contributions to scene segmentation in left- and right-hemisphere-damaged patients
AU - Peterson, Mary A
AU - Gerhardstein, Peter C.
AU - Mennemeier, Mark
AU - Rapcsak, Steven Z
PY - 1998/12
Y1 - 1998/12
N2 - Participants viewed elongated rectangular displays in which two regions shared a central contour. In experimental stimuli, the central contour portrayed a known object on one, high-denotative, side. In control stimuli, no known objects were portrayed on either side of the central contour, but one side of each control stimulus was a scrambled version of one of the high- denotative regions, matching it on all factors known to influence scene segmentation other than object recognition. For each display, participants decided whether the left or the right region was more likely to be an object. Paradoxically, both right-hemisphere- (RH) and left-hemisphere- (LH) damaged individuals were more likely to see objects lying on the contralesional rather than the ipsilesional side of the central contour. This tendency is attributed to an object-centered attentional bias toward the central contour when objects lie on its contralesional side and away from the central contour when objects lie on its ipsilesional side. Object-centered attentional biases were stronger following RH than LH damage. Elderly control participants showed a slight bias in the same direction as RH-damaged individuals. More high-denotative regions than scrambled regions were seen as objects, even when object-centered attention was biased away from the central contour carrying the object recognition information. The latter result suggests that the object recognition processes contributing to scene segmentation are preattentive.
AB - Participants viewed elongated rectangular displays in which two regions shared a central contour. In experimental stimuli, the central contour portrayed a known object on one, high-denotative, side. In control stimuli, no known objects were portrayed on either side of the central contour, but one side of each control stimulus was a scrambled version of one of the high- denotative regions, matching it on all factors known to influence scene segmentation other than object recognition. For each display, participants decided whether the left or the right region was more likely to be an object. Paradoxically, both right-hemisphere- (RH) and left-hemisphere- (LH) damaged individuals were more likely to see objects lying on the contralesional rather than the ipsilesional side of the central contour. This tendency is attributed to an object-centered attentional bias toward the central contour when objects lie on its contralesional side and away from the central contour when objects lie on its ipsilesional side. Object-centered attentional biases were stronger following RH than LH damage. Elderly control participants showed a slight bias in the same direction as RH-damaged individuals. More high-denotative regions than scrambled regions were seen as objects, even when object-centered attention was biased away from the central contour carrying the object recognition information. The latter result suggests that the object recognition processes contributing to scene segmentation are preattentive.
UR - http://www.scopus.com/inward/record.url?scp=0032414596&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032414596&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032414596
VL - 26
SP - 357
EP - 370
JO - Psychobiology
JF - Psychobiology
SN - 0889-6313
IS - 4
ER -