Artículos de revistas
Looking at Breakout: Urgency and predictability direct eye events
Fecha
2011-12Registro en:
Shalóm, Diego Edgar; Dagnino, Bruno; Sigman, Mariano; Looking at Breakout: Urgency and predictability direct eye events; Pergamon-Elsevier Science Ltd; Vision Research; 51; 11; 12-2011; 1262-1272
0042-6989
CONICET Digital
CONICET
Autor
Shalóm, Diego Edgar
Dagnino, Bruno
Sigman, Mariano
Resumen
We investigated the organization of eye-movement classes in a natural and dynamical setup. To mimic the goals and objectives of the natural world in a controlled environment, we studied eye-movements while participants played Breakout, an old Atari game which remains surprisingly entertaining, often addictive, in spite of its graphic and structural simplicity. Our results show that eye-movement dynamics can be explained in terms of simple principles of moments of prediction and urgency of action. We observed a consistent anticipatory behavior (gaze was directed ahead of ball trajectory) except during the moment in which the ball bounced either in the walls, or in the paddle. At these moments, we observed a refractory period during which there are no blinks and saccades. Saccade delay caused the gaze to fall behind the ball. This pattern is consistent with a model by which participants postpone saccades at the bounces while predicting the ball trajectory and subsequently make a catch-up saccade directed to a position which anticipates ball trajectory. During bounces, trajectories were smooth and curved interpolating the V-shape function of the ball with minimal acceleration. These results pave the path to understand the taxonomy of eye-movements on natural configurations in which stimuli and goals switch dynamically in time. © 2011 Elsevier Ltd.