Paralysis of the left arm might be explained by a problem in the

A. motor cortex in the frontal lobe in the left hemisphere.
B. motor cortex in the frontal lobe in the right hemisphere.
C. sensory-motor cortex in the temporal lobe in the left hemisphere.
D. motor cortex in the parietal lobe in the left hemisphere.

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Blindness could result from damage to which cortex and lobe of the brain? A. visual cortex in the frontal lobe B. visual cortex in the temporal lobe C. sensory cortex…

Jen collects survey data that indicates that students who spend more time preparing for the Ap test tend to score better than other students. Jen can now conclude that

A. studying improves exam grades.
B. a relationship exists between studying and exam grades.
C. a significant correlation exists between studying and exam grades.
D. anyone who does not study will do poorly on the exam.

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Charlotte, a nursery school student, hypothesizes that boys have fights with the finger paints more than girls do. She tests her hypothesis by casually watching the finger-painting table for three…

Vincenzo conducts an experiment to see whether fear makes mice run through mazes faster. He first selected a sample of 60 mice and then divided them into a control group and an experimental group. Which cannot be a confounding variable?

A. How fast the mice are at the start.
B. When the mice run the maze.
C. The population from which he selected his subjects.
D. How frightened the mice are before the experiment

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