Unit 2

Big Question:  How do psychologists use the scientific method to validate a hypothesis?

Research Methods Objectives:

• Describe the scientific method and the scientific attitude that facilitate the development of psychological theories.
• Describe four methods psychologists use to observe and describe behavior systematically.
• Discuss why correlations enable prediction but do not provide an explanation.
• Describe the nature and advantages of experimentation and identify the elements of an experiment.
• Discuss the ethics of experimentation and how psychologists’ values influence their work.
• Explain the problems of bias on rational thought.

Research Methods Overview

The Methods of Study chapter explains the limits of intuition and common sense in reasoning about behavior and mental processes.  To counteract our human tendency toward faulty reasoning, psychologists adopt a scientific attitude that is based on healthy skepticism, open-minded humility, and critical thinking.  This chapter also explains how psychologists employ the research designs of description, correlation, and experimentation in order to objectively describe, predict, and explain behavior.  The chapter concludes with a discussion of several questions people often ask of psychology, including why animal research is relevant, whether laboratory experiments are ethical, whether behavior varies with gender, and whether psychology’s principles don’t have the potential for misuse.  This chapter introduces a number of concepts that will play an important role in later chapters.  Make sure you understand the method of experimentation, especially the importance of control conditions and the difference between independent and dependent variables.