PSY Exam Prep – Chap 2
5 Steps in the Scientific Method:
Types of studies:
• Naturalistic observation: observe behaviour of people in their natural environment
• Correlation study: observe and see if 2 variables have a relationship. The magnitude can
range from correlation coefficient -1 to +1 (either negative correlation: one goes up one
goes down, or negative correlation: both go up).
• Experiment: change one variable and see if it effects another variable
Nominal fallacy: the incorrect belief that one has explained a behaviour just by describing it.
In order for an experiment to be accurately duplicated and produce the same results each time,
accurate descriptions of the variables must be provided. These are called Operational
Definitions: defining a variable in terms of the operations a researcher used to
If the operational definitions are correct, then the experiment has Valid