People become depressed because they are more likely to interpret things in a negative manner

Which strategy for promoting generalization involves teaching skills that will lead to reinforcement in relevant situations in the natural environment?

a. incorporating a variety of relevant stimulus situations in training b. training skills that contact natural contingencies c. reinforcing occurrences of generalization d. incorporating common stimuli

Edwin is able to see normally in low-light conditions and demonstrates a normal ability to detect movements in his periphery. However, he has great difficulty recognizing different colors. He sees the world mostly in shades of gray. Which structure is either impaired or not present in Edwin's eyes??

a. ?fovea b. ?cornea c. ?rods d. ?cones