PercepFiguras: Programa computarizado de estimulación visual para evaluar conductual y electrofisiológicamente la percepción multiestable
Por:
Ortiz-Cruz E.E., Rodríguez-Camacho H., Rodríguez-Camacho M.A., Bernal-Hernández J.
Publicada:
1 ene 2018
Categoría:
Biomedical engineering
Resumen:
In the study of visual perception, the use of computerized commercial programs for the presentation of stimuli, usually configured to admit a response for each stimulus presented, is common. However, the study of multistable perception requires the presentation of a stimulus that remains unchanged, although the perception of it can vary in two or more configurations during its observation, which demands that the program admit responses for each change in perception of the same stimulus. PercepFiguras is a system developed with C++ programming language that allows: a) present images and receive multiple responses to the same stimulus, b) synchronize the responses with an electroencephalographic recording system by sending TTL pulses, c) generate a behavioral file, d) generate a file with the total responses and averages of the latencies for each type of figure. In the pilot study with a task of continuous presentation of an ambiguous figure to alternating with two variants of less ambiguity, we observe greater frequency of perceptual and less perceptual stability to the ambiguous figure with respect to the less ambiguous figures, which proves the usefulness of the program. © 2018 Sociedad Mexicana de Ingenieria Biomedica. All rights reserved.
Filiaciones:
Ortiz-Cruz E.E.:
Facultad de Estudios Superiores de Iztacala, UNAM, Instituto de Neuropsicología y Neurociencias Cognitivas, Mexico
Rodríguez-Camacho H.:
Facultad de Estudios Superiores de Iztacala, UNAM, Instituto de Neuropsicología y Neurociencias Cognitivas, Mexico
Rodríguez-Camacho M.A.:
Facultad de Estudios Superiores de Iztacala, UNAM, Instituto de Neuropsicología y Neurociencias Cognitivas, Mexico
Bernal-Hernández J.:
Facultad de Estudios Superiores de Iztacala, UNAM, Instituto de Neuropsicología y Neurociencias Cognitivas, Mexico
|