motion perception

function of motion perception

• break camouflage - attention attracted to movement

• attract attention

• segregate object from background

• interpret events - interaction

• determine structure of object

• determine actions being performed - static ambiguous

life without motion perception

akinetopsia - damage to motion perception part of brain so see things have moved but not them moving

when do we perceive motion

real motion - something in motion

illusory motion - nothing actually moving

motion - aftereffects

induced moving - moving background so object appear moving

apparent motion - stationary images in succession

motion induced blindness + motion induced change blindness

• can make things disappear

• make it harder to notice changes

• stationary dots changing colour = obvious, moving = cant see it - attention not preferential to colour change as lots of motion

motion illusions

• inform us of processes underlying motion perception

• low contrast seems to move slower than high contrast objects

• aperture problem - if you can’t see the end of a line the movement is ambiguous