1. Scientific Basis of Psychology

2. Using the scientific method
First there is a theory.
Bunnies make people happy.
Formulate a testable hypothesis (If…Then statement).
IF a person sees a bunny (X) THEN he/she will smile (Y).
Operational definition must be established.
Select the research method and design the study.
Collect the data.
Analyze the data.
Generate or refine our theory and/or hypothesis.
Replication.

3. Research Methods Experimental. Independent variable (X).
To find out if X affects Y.
Independent variable (X).
Dependent variable (Y).
In our study if we did an experiment, what would the IV and DV be (If X affects Y)?
Sampling.

4. Research Methods: Experiment Cont.
Experimental and control groups
Experimental group receives the IV.
Control group does not receive the IV, may receive a placebo.
There MUST be random assignment to these groups.
Double blind design.
Controls experimenter bias.
Confounding variables.
Now, what is a smile? Operational definition.
Make a chart 1-9 and keep track of the following pictures, is it a smile?