Define External Validity in Research Design

question 65

Essay

Define external validity in research design. Describe in detail one threat to the external validity of a research study. Be sure to specify how that characteristic is a threat to external validity.

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Definitions:

Dependent/Outcome Variable

In statistical modeling, this variable is what researchers aim to predict or explain, depending on the independent variables.

Log(Odds)

The natural logarithm of the odds ratio, used in logistic regression to model a binary outcome variable.

Estimated Odds

A statistical measure expressing the likelihood of a particular outcome or event occurring.

Multiple Logistic Regression

A statistical method that models the relationship between multiple independent variables and a binary dependent variable.