In Trying to Make Sense Out of the Unusual Experimental

question 52

Multiple Choice

In trying to make sense out of the unusual experimental results, Dr. Kling and Dr. Hunger carefully reviewed a video tape of the experimental assistant interacting with the research participants. "Look at that!" said Dr. Hunger as she pointed at the screen. "He's smiling as he hands the fake vitamins to the participants in the placebo control group, but he didn't smile when he handed the real vitamins to the participants in the experimental group." "Well," said Dr. Kling, shaking his head, "It looks like we'll have to invalidate the experiment because the:

• A) experimental assistant was displaying demand characteristics."
• B) requirement of random assignment has been violated."
• C) research assistant changed the study from a single-blind study to a double-blind study."
• D) research assistant forgot to debrief the participants before handing out the vitamins."

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Definitions:

Corpus Callosum

A wide, thick nerve tract consisting of a bundle of nerve fibers that connects the two cerebral hemispheres, facilitating interhemispheric communication.

Motor Cortex

A part of the cerebral cortex concerned with devising, supervising, and enacting movements done by choice.

Left Side Of The Brain

Refers to the left hemisphere of the brain, which is typically associated with logical reasoning, analytical skills, and language processing.

Limb Movements

Physical actions or gestures involving the arms, legs, hands, or feet, often in relation to locomotion or expression.