Optical information about the severity of upcoming contacts.
J Exp Psychol Hum Percept Perform
; 19(1): 179-93, 1993 Feb.
Article
en En
| MEDLINE
| ID: mdl-8440984
ABSTRACT
The time derivative (tau) of the inverse of the relative rate of optical expansion (tau) may have critical values with potential implications for controlling activity. The present research addresses the particular hypothesis that tau < -0.5 specifies "unsafe" collision courses and tau > or = -0.5 specifies "safe" collision courses. Optical expansion patterns were simulated on a computer with -1.0 < or = tau < 0 and judged as suggesting a "hard" or "soft" collision. tau < -0.5 led to significantly different decisions from tau > or = -0.5, but the critical value of -0.5 was not perceived reliably as soft, a deviation possibly due to discretely approximating continuous functions. Additional experiments evaluated terminal rates of change and display duration and examined the effects of biasing the presented displays toward the soft or the hard end of the tau continuum. The results were consistent with the tau hypothesis.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Orientación
/
Atención
/
Percepción de Distancia
/
Percepción de Movimiento
Límite:
Humans
Idioma:
En
Revista:
J Exp Psychol Hum Percept Perform
Año:
1993
Tipo del documento:
Article