A Researcher Uses a Repeated-Measures Design to Compare Individuals' Performance

question 33

Multiple Choice

A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment.If all the participants show improved performance of 8 or 9 points after treatment,what should the researcher find?

• A)The sample mean difference is near zero.
• B)The t statistic is near zero.
• C)The variance of the difference scores is near zero.
• D)None of the other options is correct.

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Definitions:

Wild Sheep

Wild sheep are species of ungulates belonging to the genus Ovis in the family Bovidae, native to rugged mountainous regions, and are ancestors to domestic sheep.

Joint Attention

A foundational skill in which two individuals use gestures and gaze to share focus on an object or event, important for social and language development.

Dogs

Domesticated carnivorous mammals known for their loyalty and companionship to humans, classified under the species Canis lupus familiaris.

Psychological Ability

The capacity of the human mind to comprehend, reason, and solve problems effectively.