Which of the following would a concrete operational child be able to do?
a. add 3 plus 3 to get 6 c. reverse their thinking
b. subtract 3 from 6 to get 3 d. all of these
D
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Gaps in the insulating material that surrounds axons are known as ____
a. interpeduncular nuclei b. nodes of Ranvier c. myelin synapses d. presynaptic terminals
Which describes an abstract idea that cannot be directly observed?
A. hypothesis B. variable C. social desirability D. construct
You are watching a rat in a Skinner box, and every time a red light comes on, the rat presses the bar in the cage. However, when a green light comes on, the rat never presses the bar. In this case, it appears that the color of the light is acting as:
a. a positive reinforcer for bar pressing b. a negative reinforcer for bar pressing c. an unconditioned stimulus for bar pressing d. a discriminative stimulus for bar pressing
The colored part of the eye which contains muscles to contract or expand the pupil is the __________
a. lens b. fovea c. iris d. cornea