How Many Participants Would Be Needed for a Within-Subjects Experiment

question 30

Multiple Choice

How many participants would be needed for a within-subjects experiment comparing four different treatment conditions with a total of 20 scores in each treatment?

• A)20
• B)40
• C)80
• D)cannot answer without more information

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Definitions:

Extraverts

Individuals who are outgoing, energized by social interactions, and tend to seek stimulation from their environment.

Introverts

Individuals characterized by a preference for quieter, more solitary activities over social interactions, often thoughtful and self-reflective.

Emotional Instability

A state characterized by rapid and intense emotional changes, often seen in various psychological disorders.

Trait Theorists

Psychologists who study personality and individual differences by focusing on measurable traits.