Ch. 1 Thinking Critically Some coming attractions: What makes Psychology a science? What is a theory? How can we study people? How do we know if two things are related? During research, what is it that we are testing? What are some problems with research? How can we test the results of research? What makes Psychology a science? The scientific method What is a theory? What is the relationship between theory and research? During a research, what is it that we are testing? Our hypothesis What research methods can we use to study people? Survey Case study Experiment Naturalistic observation How do we know if two things are related? Correlation What is the difference between types of correlation? Positive correlation Negative correlation Zero correlation Spurious correlation Illusory correlation What are some problems we need to be aware of with research? Placebo effect Hindsigtht bias How can we reduce the effect of the placebo effect? Double blind research design. How can we test the results of a research study? Replication How do I know the small group I study represents the larger group I want to say something about? Random sampling How do I know my two groups are equal? Random assignment