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LEARNING OBJECTIVES
- Define the concept of a variable, distinguish quantitative from categorical variables, and give examples of variables that might be of interest to psychologists.
- Explain the difference between a population and a sample.
- Describe two basic forms of statistical relationship and give examples of each.
- Interpret basic statistics and graphs used to describe statistical relationships.
- Explain why correlation does not imply causation.
Before we address where research questions in psychology come from—and what makes them more or less interesting—it is important to understand the kinds of questions that researchers in psychology typically ask. This requires a quick introduction to several basic concepts, many of which we will return to in more detail later in the book.
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