Question

Complete: Chapter 1 Problem Set 4. Dependent and independent variables Aa The following research studies consist of two or more groups of scores being compared. For each, decide whether the study is experimental or nonexperimental, and then identify the dependent, independent, or quasi-independent variables. A researcher would like to find out more about the determinants of college achievement. He conducts a study on 437 college students in which he measures their IQ levels and their grades in college courses. The researcher created five different groups using the students' IQ levels and then compared the average grades among members in different groups. This study is an example of study variable. IQ group assignment is the The grades of the college students is the variable. Researchers at a medical school conducted a study to test the effectiveness of a new treatment for lung cancer. Of the 128 lung cancer patients in an affiliated hospital, 94 volunteered for the new treatment, while the remaining 34 declined and underwent traditional treatment instead. The survival rates for the two treatment groups were measured after 12 months. This study is an example of study. variable. The type of lung cancer treatment Whether a patient survives after 12 months is the is the variable

Answer 1

This is an example of a non- experimental study.

The grades of college students are the dependent variable. The IQ group assignment is a Quasi-independent variable.

This study is an example of a non-experimental study.

whether a patient survives after 12 months is the dependent variable. The type of lung cancer treatment is the Quasi- independent variable.

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