What percentage of older adults volunteer in political campaigns?

Convergence is a cue for distance perception that

a. involves the angle between the eyes. b. involves the amount of disparity between retinal images. c. is monocular. d. depends on visual objects overlapping with each other. e. depends on the perceiver's own movement.

The "Doctrine of Specific Nerve Energies" concerns:

a. The one-to-one relationship between sensory stimulation and perception b. How each sensory projection area produces its own unique experience regardless of the nature of the input c. The development of pathways from the sensory receptor to the experiencing cortical area d. The differences in perceptual experiences across species