Chapter 15. Psychological Disorders

15.1 Section Title

Topic: Comorbidity: How Often Do Multiple Disorders Occur?

Statistical Concepts Covered: In this applet, you’ll learn more about relationships by looking at comorbidity or the prevalence of having two disorders at the same time. We will also discuss the importance of operational definitions.

Introduction

Your text chapter discusses various mental disorders and their symptoms, as well as the impact these disorders have on individuals. The data for this applet comes from the National Comorbidity Survey (NCS), detailed interviews conducted on a nationally representative sample to determine whether individuals exhibited symptoms of various disorders. Our analysis of this data will focus on comparing the prevalence of these disorders and their comorbidities, the rates at which individuals experience two disorders at the same time.

Richard Alan Hullinger, Indiana University, Bloomington
Melanie Maggard, University of the Rockies

Statistical Lesson. In previous applets we considered correlations and how we use them to look at a relationship between two variables. These variables were sometimes numerical and sometimes categorical. In the case with comorbidity we are looking at categories again because we are evaluating how many people fit into two categories or disorders at the same time. This is what we refer to as comorbidity, the presence of two disorders in an individual at the same time.

When identifying variables within a study it is important that we have operational definitions, which explain how we will manipulate or measure our variables. In the case of comorbidity there might be two ways we can define how we are measuring a person’s experience of two disorders during the same time period.

First, we may choose to operationally define someone as having comorbidity for two disorders if they experience both within a 12 month period, which we will refer to as 12 month prevalence in this applet. Second, we may choose to operationally define someone as having comorbidity if they experience two disorders at any point in their lifetime, which we will refer to as lifetime prevalence.

It is important to distinguish between these two as they can lead to very different interpretations. Be sure to keep this in mind when answering the questions in this applet. Think about how the time frame being used to define the comorbidity may lead us to different conclusions. As a reminder, any analysis of relationships should focus only on that relationship and not imply causality.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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Correct.
Incorrect.

Question

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
Correct.
Incorrect.

Question

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
Correct.
Incorrect.

Congratulations! You have completed this activity.

.