pattern1 pattern2 pattern3 pattern4 pattern51.9

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 Konno1 , Ruggero Micheletto11)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 linearcourse 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 H0

2

4

6

8

10

パターン１ パターン２

A B C D E F G H0

2

4

6

8

10

パターン１ パターン３

A B C D E F G H0

2

4

6

8

10

パターン１ パターン４

A B C D E F G H0

2

4

6

8

10

パターン１ パターン５

Illusions Pattern Velocity Fluctuation

Non 1 2.34

Exercise2 2.38 +1.71%

3 2.45 +4.70%

Angle4 2.14 -8.55%

5 2.16 -7.69%

A-H: Subjects

elap

sed

tim

e (s

ecs)

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. en

trop

y

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

Ve

loci

ty

□ 　 Pattern １■ 　 Pattern ２

□ 　 Pattern １■ 　 Pattern ３

□ 　 Pattern １■ 　 Pattern ４

□ 　 Pattern １■ 　 Pattern ４

Time(s)

Y P

ositi

onY

Pos

ition

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!