A Researcher Notices That the Participants Assigned to the Experimental

question 11

Multiple Choice

A researcher notices that the participants assigned to the experimental group were less likely to attend the second session in his experiment than those in the control group. The researcher is concerned that __________ might represent a potential threat to the internal validity of her study.

• A) history
• B) attrition
• C) instrumentation
• D) maturation

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Definitions:

Low Activity Level

A trait or condition characterized by a lower than average rate of physical movement or actions.

Phlegmatic

A temperament characterized by calmness, reliability, and a relaxed disposition, traditionally one of the four temperaments.

Kohlberg's Moral Reasoning

A theory that proposes the stages of moral development, suggesting that an individual's ability to reason about moral issues advances through distinct stages as they age.

Predictive

Relating to the ability to foretell or forecast future events or behaviors based on current data or past experiences.