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Fundamental Issues in Experimental Design: Bias Control

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Questions and Answers

What is the primary purpose of the design of interventions in health research?

To manipulate outcome variables
To guarantee statistical significance
To ensure valid data relevant to the tested hypothesis (correct)
To increase the sample selection

What is the independent variable in an experimental research?

The treatment or condition applied to the experimental groups (correct)
The placebo group
The dependent variable
The outcome variable

What is the role of manipulation in true experimental research?

To purposefully change the independent variable (correct)
To ensure statistical significance
To manipulate outcome variables
To guarantee concordance with the null hypotheses

Why is careful choice of the outcome variable essential for the success of an experiment?

To ensure valid data relevant to the tested hypothesis (D) Signup and view all the answers

In comparative experiments, what are groups with specific interventions compared with?

Groups unexposed to interventions (C) Signup and view all the answers

What is the significance of observed differences assessed for in comparative experiments?

Statistical significance (B) Signup and view all the answers

What is the purpose of establishing clear procedural guidelines for application of the treatment in experimental research?

To ensure that the manipulation of the independent variable does not affect the dependent variable (B) Signup and view all the answers

What is the role of control in experimental research?

To prevent the influence of outside factors from affecting the outcome of the study (B) Signup and view all the answers

Why is random selection important in experimental research?

To ensure an accurate representation of the larger population (C) Signup and view all the answers

What is the purpose of random assignment of subjects into groups in true experimental design?

To ensure that the outcome of the study is due to the manipulation of the independent variable (A) Signup and view all the answers

What are inclusion/exclusion criteria in experimental research?

Identification of characteristics making participants ineligible for the study (A) Signup and view all the answers

Why is informed consent essential in experimental research?

To ensure that participants willingly consent to be part of the study (C) Signup and view all the answers

What is one purpose of establishing clear procedural guidelines for application of treatment in experimental research?

To promote consistency in the application of treatment (B) Signup and view all the answers

Why is it important to prevent extraneous variables from influencing the outcome of a study?

To ensure that the outcome is caused by manipulation of the independent variable (C) Signup and view all the answers

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