The following research studies consist of two or more groups of scores being com

Question

The following research studies consist of two or more groups of scores being compared. For each, decide whether the study is experimental or non-experimental, 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. The grades of the college students is the___ variable. IQ group assignment is the___ variable. Researchers at a school of public health conducted a study to test the effect of organic produce on cancer mortality. The 400 patients with prostate cancer who volunteered for the study were randomly assigned to a diet of either organic or conventional produce. The progression of their cancer was monitored, and researchers documented the length of time each patient survived. This study is an example of ___study. The survival time is the___ variable. The type of diet is the___ variable.

Explanation / Answer

1. This is an example of observational study. The grades of the college students is the dependent varaible. The IQ group assignment is the independent variable.

2. This is an example of experimental study. The survival time is the dependent variable. The type of diet is the independent variable.

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