A researcher is interested in knowing if exposure to certain chemicals has an effect on mental acuity in old age. He compares the mental acuity of a group of elderly people who were exposed to the chemicals and another group who were not. The study would be an example of what kind of research?

Question

Quizplus · Accepted Answer

This study is a quasi-experiment because it involves comparing two groups (those exposed to chemicals and those not) on an outcome (mental acuity), but the researcher does not manipulate the exposure to the chemicals, which is a key feature of true experiments.

A Researcher Is Interested in Knowing If Exposure to Certain