The phi-phenomenon __________________________?

The phi-phenomenon __________________________?

A. relates to electrical stimulation of the brain
B. deals with experience common to the state of alpha-wave relaxation
C. occurs in response to sequentially flashing light
D. occurs in response to a spot of light in a darkened room

Half of line has arrows or fins pointing outward. The remaining half has arrows or fins pointing inward. The first half looks longer than the second half. This is the ______________ illusion?

Half of line has arrows or fins pointing outward. The remaining half has arrows or fins pointing inward. The first half looks longer than the second half. This is the ______________ illusion?

A. Zollner
B. Wundt
C. Muller-Lyer
D. Poggendroff