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A Researcher Is Unable to Retest Some of His Participants

question 17

Multiple Choice

A researcher is unable to retest some of his participants in a before-after design because they have dropped out of the program. This is an example of a(n) ________threat.


Definitions:

Play Materials

Items and resources used to facilitate play and encourage learning and development in children.

Piaget

Refers to Jean Piaget, a Swiss psychologist known for his pioneering work in the study of child development and his theory of cognitive development.

Formal Operational Stage

A phase in Jean Piaget's theory of cognitive development where individuals (around age 11 and older) gain the ability to think abstractly and reason logically.

Cause and Effect

The relationship between events where one is the result of the other or others, a fundamental concept in identifying reasons behind certain outcomes.

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