Anne's Study Compared Pre-Post Differences in Prekindergarten Children's Strategies for Alternatives

question 30

Multiple Choice

Anne's study compared pre-post differences in prekindergarten children's strategies for alternatives to violent displays when frustrated by others. She found that there were differences between pre and posttesting. With which validity threat should Anne be most concerned?

• A) Differential selection
• B) Statistical regression
• C) Maturity
• D) Instrumentation

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Definitions:

Mean Value

Mean value is the average of a set of numbers, calculated by dividing the sum of all values by the quantity of numbers.

Error Term

A variable in a statistical model that captures the difference between observed and predicted values.

Linear Relationship

A relationship between two variables where the change in one variable is directly proportional to the change in another.

Scatter Chart

A type of graph used to display values for two variables for a set of data, showing the relationship between them.