15.4
Oftentimes in psychological studies, researchers want to collect information from their participants as quickly and easily as possible. Perhaps it’s the end of the semester and a professor wants to swiftly measure his honors students’ experience at college before they leave for summer break.
He can accomplish this goal by giving out a survey—a means of collecting data that requires participants to answer a set of questions. Depending on the circumstance, surveys can be administered verbally, as a pen-and-paper task, or by using an electronic device.
Surveys often include Likert scales—numbered scales that participants use to rate questions or statements. In the professor’s case, he may ask students to answer how much they agree or disagree with a statement like, “I’m unhappy with most of my classes,” on a continuum from 1—they strongly disagree—to 5—they strongly agree.
Now, technically, the professor is only administering the survey to a biased sample of his own students, which is known as convenience sampling—non-randomly recruiting research participants who are easily accessible.
As a result, he is limiting his ability to generalize the results to the population he’s interested
Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be…
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