pattern1 pattern2 pattern3 pattern4 pattern5 1.9 2 2.1 2.2 pattern5 pattern3 pattern4 pattern2 Psychophysical influence of visual perception on person’s behavior (human task) using optical illusions in a background Kazuki Konno 1 , Ruggero Micheletto 1 1)Yokohama City University, Japan The Question Do attentional heavy tasks are affected by background colour and properties? The Hypothesis When we attend a task, attention to foreground is somehow entangled with the background. Our actions are measurably different for identical tasks with different backgrounds The Method We created a simple task in which subjects were asked to move a circle along a linear course using the mouse. Five identical tasks with different patterns in the background. Optical illusion were used for enhanced effect. Results We found significantly different response time for identical tasks performed with different backgrounds. Data suggest that foreground task-related objects are entangled with from static task-unrelated backgrounds. Experiment We measured the time and p-value for the task by each pattern. Analysis A B C D E F G H 0 2 4 6 8 10 パターン1 パターン2 A B C D E F G H 0 2 4 6 8 10 パターン1 パターン3 A B C D E F G H 0 2 4 6 8 10 パターン1 パターン4 A B C D E F G H 0 2 4 6 8 10 パターン1 パターン5 Illusions Pattern Velocity Fluctuation Non 1 2.34 Exercise 2 2.38 +1.71% 3 2.45 +4.70% Angle 4 2.14 -8.55% 5 2.16 -7.69% A-H: Subjects elapsed time (secs) p=0.066 p=0.012 p=0.311 p=0.076 Significant difference was seen between pt.1 and pt.4 The movement of the hand became faster by the effect of some optical illusion, and became slower by the “pattern 4” optical illusion. entropy pt.1 pt.2 pt.3 pt.4 pt.5 We calculated a value of the entropy as the degree of deviation from center of the horizontal component. Location Velocity □ Pattern 1 ■ Pattern 2 □ Pattern 1 ■ Pattern 3 □ Pattern 1 ■ Pattern 4 □ Pattern 1 ■ Pattern 4 Time(s) Y Position Y Position Average pattern 4 A value in pt.4 becomes smaller than others. Therefore we can say that the movement of the subject becomes careful by the influence of a background!