COACTIVATION AND STATISTICAL FACILITATION IN THE DETECTION OF LINES

被引:29
作者
SCHWARZ, W
ISCHEBECK, A
机构
[1] Psychologisches Institut, Freie Universität Berlin
关键词
D O I
10.1068/p230157
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
The redundant-signals effect describes the general phenomenon that simple reaction times to two simultaneously presented signals are typically faster than the corresponding reaction times to each of the signals presented alone. Recent studies (eg Miller 1982, 1986) indicate that models of probability summation in which an independent detection of both signals is assumed cannot completely account for the observed shortening of the reaction times. Therefore, models in which some kind of coactivation is assumed are often considered as an alternative explanation. In the present study simple reaction times to parallel lines are compared with those to orthogonal lines and single lines. Our first hypothesis is that because of the redundant-signals effect, the reaction time to configurations consisting of two lines (either parallel or orthogonal) will generally be faster than the reaction time to a single line. Furthermore, line detection can be related to orientation-specific line detectors. Therefore, parallel lines may be thought to activate similar line detectors and, by coactivation, facilitate detection. As our second hypothesis we thus expect that the reaction time to parallel lines will be shorter than the reaction time to orthogonal lines. To test these hypotheses, we conducted a simple reaction-time experiment in which signal onset asynchronies ranging from 0 to +/-56 ms for the orthogonal lines were used. In addition, reaction times to parallel lines and single lines were measured. Both hypotheses are supported by our data. We formulate a stochastic model which is able to explain both statistical facilitation and coactivation in a physiologically plausible way.
引用
收藏
页码:157 / 168
页数:12
相关论文
共 34 条
[1]   RECEPTIVE FIELDS OF SIMPLE CELLS IN CAT STRIATE CORTEX [J].
BISHOP, PO ;
CCOMBS, JS ;
HENRY, GH .
JOURNAL OF PHYSIOLOGY-LONDON, 1973, 231 (01) :31-60
[2]   FURTHER DEVELOPMENTS IN BINOCULAR SUMMATION [J].
BLAKE, R ;
SLOANE, M ;
FOX, R .
PERCEPTION & PSYCHOPHYSICS, 1981, 30 (03) :266-276
[3]  
BLAKE R, 1980, INVEST OPHTH VIS SCI, V19, P930
[4]   RESPONSES TO SINGLE PHOTONS IN VISUAL CELLS OF LIMULUS [J].
BORSELLI.A ;
FUORTES, MGF .
JOURNAL OF PHYSIOLOGY-LONDON, 1968, 196 (03) :507-&
[5]   ON THE INTEGRATE CAPACITY IN TIME AND SPACE OF THE HUMAN PERIPHERAL RETINA [J].
BOUMAN, MA ;
VANDENBRINK, G .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1952, 42 (09) :617-620
[6]   EFFECT OF ORIENTATION ON VISUAL RESOLUTION OF GRATINGS [J].
CAMPBELL, FW ;
KULIKOWSKI, JJ ;
LEVINSON, J .
JOURNAL OF PHYSIOLOGY-LONDON, 1966, 187 (02) :427-+
[7]  
COLONIUS H, UNPUB BINOCULAR REAC
[8]   A FURTHER TEST OF THE SUPERPOSITION MODEL FOR THE REDUNDANT-SIGNALS EFFECT IN BIMODAL DETECTION [J].
DIEDERICH, A ;
COLONIUS, H .
PERCEPTION & PSYCHOPHYSICS, 1991, 50 (01) :83-86
[9]   ASYMMETRIES IN ORIENTED-LINE DETECTION INDICATE 2 ORTHOGONAL FILTERS IN EARLY VISION [J].
FOSTER, DH ;
WARD, PA .
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 1991, 243 (1306) :75-81
[10]   INHIBITORY EFFECTS OF ORIENTATIONAL ADAPTATION [J].
GILINSKY, AS ;
MAYO, TH .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1971, 61 (12) :1710-&