A Researcher Computes the Mean Difference in Locomotion in a Sample

question 75

Multiple Choice

A researcher computes the mean difference in locomotion in a sample of 12 rats before and 30 minutes after an injection of amphetamine.Rats were placed in a box with infrared beams.The number of times rats crossed the beams was used as a measure of locomotion.The mean difference in locomotion was 6.2±8.4 ( ) ,and this difference was significant.What is the effect size for this result using estimated Cohen's d?

• A)d = 0.74 (medium effect)
• B)d = 1.36 (medium effect)
• C)d = 0.74 (large effect)
• D)d = 1.36 (large effect)

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Definitions:

Cerebrum

The largest part of the brain, responsible for higher brain functions such as thought and action.

Parietal

Refers to the parietal lobe in the brain, which processes sensory information such as touch, temperature, and pain.

Higher Mental Activity

Complex cognitive processes including thinking, reasoning, decision-making, and problem-solving beyond simple perception and memory.

Cerebrum

The largest part of the brain, responsible for voluntary actions, speech, thoughts, memory, and sensory processing.