Which of the components of motivation involves focusing one's energy and mental effort and applying them toward the task at hand?

The apparent (or relative) brightness of two objects will remain the same as long as

a. both objects are of similar size. b. both objects are of similar shape. c. both objects are illuminated by the same amount of light. d. each object is illuminated by a different amount of light.

According to the trichromatic theory, what is the difference between bright orange and dim orange?

a. Bright orange produces a different ratio of responses by the types of receptors b. Bright orange excites only one type of receptor. c. Bright orange excites the same receptors, but more strongly. d. Bright orange excites the rods in addition to cones.