You Want to Determine the Relationship Between Caffeine Intake and Performance

question 41

Multiple Choice

You want to determine the relationship between caffeine intake and performance on a mid-quarter exam. As students sit down to take the exam, you ask them to write the number of cups of tea, soda, or coffee they ingested two hours prior to the exam. You also obtain their exam scores. You calculate the correlation coefficient between the two variables to be +0.82. What can you conclude?

• A) Higher caffeine consumption is related to higher exam scores.
• B) Eighty-two percent of the students consumed caffeine prior to the exam.
• C) Drinking coffee caused better scores.
• D) The more caffeine students consumed, the worse they scored on the exam.

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Definitions:

Higher Probability Behavior

A concept in operant conditioning referring to a behavior that occurs more frequently, thus can be used as a reinforcement for a behavior of lower frequency.

FR-2 Schedule

A fixed-ratio schedule where reinforcement is provided after every second correct response.

FR-4 Schedule

A fixed-ratio schedule where a response is reinforced only after four instances of that response.

Prefrontal Cortex

The front part of the frontal lobes of the brain, involved in complex behaviors, decision making, and moderating social behavior.