Biomedical subjects

Tadayuki Tayama

Publications and source records attributed to Tadayuki Tayama.

3 recordsLinked to original sources

PubMed2005

The effect of exogenous spatial attention on auditory information processing.

This study investigated the effect of exogenous spatial attention on auditory information processing. In Experiments 1, 2 and 3, temporal order judgment tasks were performed to examine the effect. In Experiment 1 and 2, a cue tone was presented to either the left or right ear, followed by sequential presentation of two target tones. The subjects judged the order of presentation of the target tones. The results showed that subjects heard both tones simultaneously when the target tone, which was presented on the same side as the cue tone, was presented after the target tone on the opposite side. This indicates that spatial exogenous attention was aroused by the cue tone, and facilitated subsequent auditory information processing. Experiment 3 examined whether both cue position and frequency influence the resulting information processing. The same effect of spatial attention was observed, but the effect of attention to a certain frequency was only partially observed. In Experiment 4, a tone fusion judgment task was performed to examine whether the effect of spatial attention occurred in the initial stages of hearing. The result suggests that the effect occurred in the later stages of hearing.

Attention↗

PubMed2004

The spatial and temporal conditions for perceiving velocity as constant.

Perceived velocities during a brief period of exposure (< 1.2 s) were measured to examine how much time is necessary to perceive velocity as constant. Moving sinusoidal gratings were used as stimuli at relatively low velocities. At the beginning of each stimulus presentation, a moving pattern was perceived as stationary until a critical time had passed. After that, perceived velocity was positively correlated with moving distance, irrespective of physical velocity below a critical moving distance. Beyond the critical moving distance, velocity was perceived as constant. A simple model is presented to explain these results.

Acceleration↗

PubMed2003

Independent mechanisms for dividing attention between the motion and the color of dynamic random dot patterns.

The present study investigated the division of attention between different visual attributes, which is a cognitive function implicated in the selection of information in a given condition. To examine the underlying mechanisms, we focused on motion and color as visual attributes. In Experiment 1, performance on single- and dual-judgment for motion and color of dynamic random dot patterns presented in a restricted visual field was examined under different priority conditions. Accuracy was the same for single- and dual-task conditions, and the attention operating characteristic (AOC) analysis indicated that motion and color perception do not share the same processing capacity. In addition, correlation analysis indicated that, on a trial-by-trial basis, performance on motion and color was considerably independent. In Experiment 2, a brief lateral cue preceded the dynamic random dot patterns. The cue affected only motion-judgment, even under dual-task conditions of motion and color. These results suggest that dividing attention between motion and color involves independent mechanisms.

Adult↗