Module 8 – Treating Depression Lab Part 1

Quiz Instructions

Work through this Learn by Doing activity to prepare for the Module 8 – Treating Depression Lab Part 1. This activity is included in the Labs and Other Activities portion of your grade. You have an unlimited number of attempts. To prepare for the lab, you must review each attempt and use the feedback to retake the quiz until you earn 100%. In other words, you cannot move on until you earn 100% on this quiz. Canvas will record your highest score.

Discussion Board

Use the Module 8 discussion board (opens in a new tab) to ask questions or provide feedback about the problems in this quiz.

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Learn by Doing

Some features of this activity may not work well on a cell phone or tablet. We highly recommend that you complete this activity on a computer.


Clinical depression is a recurrent illness requiring treatment and often hospitalization. Nearly 50% of people who have an episode of major depression will have a recurrence within 2-3 years. Being able to prevent the recurrence of depression in people who are at risk for the disease would go a long way to alleviate the pain and suffering of patients.

During the 1980’s the federal government, through the National Institutes of Health (NIH), sponsored a large clinical trial to evaluate two drugs for depression. There were 3 treatment groups. Patients received either Imipramine (Imip), Lithium (Li), or a Placebo (Pl). Researchers randomly assigned patients to one of the 3 treatment groups and followed them for 2-4 years to track any recurrences of depression.
(Prien et al., Archives of General Psychiatry, 1984).


  • Hospt: Which hospital the patient was from: Labeled 1, 2, 3, 5 or 6
  • Treat: 0=Lithium; 1=Imipramine; 2=Placebo
  • Outcome: 0=Success 1=Failure (recurrence of depression)
  • Time: Number of weeks until a recurrence (if outcome=1) or until study ended (if outcome=0)
  • AcuteT: How long the patient was depressed before the start of the current study, measured in days
  • Age: Age in years
  • Gender: 1=Female 2=Male


Download the depression datafile (as always, if a login box opens, just close it and then download the file). (directions)

Upload the datafile in StatCrunch. (directions)


In this quiz, you’ll explore the depressiondatafile in StatCrunch and familiarize yourself with the first question related to this study. In the next activity you’ll use StatCrunch to investigate the first question.

Flag this QuestionQuestion 11.3 pts

Examine the spreadsheet of data in StatCrunch. Out of the first ten individuals in the datafile, how many had a recurrence of depression during the study?

Flag this QuestionQuestion 21.4 pts

Examine the spreadsheet of data in StatCrunch. Out of the first ten individuals in the datafile who were assigned to the Lithium treatment group, how many had a recurrence of depression during the study?

Flag this QuestionQuestion 31.3 pts

Examine the spreadsheet of data in StatCrunch. How many days was the first male in the datafile depressed before the start of the study?

Flag this QuestionQuestion 46 pts

Here is the first research question related to the study:

Which of the drugs (if either) was more successful in preventing the recurrence of depression relative to the placebo?

The explanatory variable is

, and it is a


The response variable is

, and it is a


To answer the research question, you will analyze the data. Which visual graph or table is appropriate for your analysis?

Which of the following is an appropriate numerical summary to include in your analysis?

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