Motion direction identification in random cinematograms: a general model.
J Exp Psychol Hum Percept Perform
; 10(3): 378-93, 1984 Jun.
Article
en En
| MEDLINE
| ID: mdl-6242413
ABSTRACT
The cinematograms of 12 two-state elements arranged in the clock positions in space and in a sequence of adjacent 100-ms frames in time were used as stimuli. Some positions in each frame (or all 12 of them) could be labeled as "domain" ones, and every element that was T frames and S positions (clockwise or counterclockwise) apart from a domain element could repeat the latter's state with probability P. The probability of the rotation direction identification was obtained as a function of T, S, P, number of frames, and the domain positions selection scheme. A generalized version of the reversed phi phenomenon was obtained if P less than .5, then the psychometric value lies below .5 level. All the data can be accounted for by a simple model according to which the choice of direction is based on the counts of the different types of dipoles, each type being characterized by the probability and the weight of its count In most situations all dipoles but the shortest ones (connecting the neighboring elements of successive frames) can be ignored.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Percepción de Movimiento
Tipo de estudio:
Clinical_trials
/
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
J Exp Psychol Hum Percept Perform
Año:
1984
Tipo del documento:
Article