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Lecture 3

Lecture 3 PSYC 107.docx

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Department
Psychology
Course
PSYC 107
Professor
Lisa Geraci
Semester
Spring

Description
Keith Owen 1/23/14 PSYC 107 Research Methods in Psychology Next up: A real psychological question  Why do people help? o 1. Develop a theory­ a set of related ideas that are supposed to explain and/or  predict something.  Ex. People help because it makes them happy. o 2. Operationalize constructs­ to state exactly how you will measure the  phenomena of interest.  Ex. What do you mean by “help”? What do you mean by “happiness”?  How will you measure happiness?  This is important so that you can evaluate the research.  Reliability: The tendency for a measure to produce the same result  whenever it is used to measure the same thing. • Measuring the thing correctly. • Give us the same information on any given day. • Measuring core construct.  Validity: The tendency for a measure to accurately capture what it intends  to measure. • Measuring the correct thing. • We can test whether it relates to other constructs. • Always try to build a better test. o 3. Propose a hypothesis­ a specific concrete idea to examine.  If your theory cannot be tested, it is not a good theory.  Working hypothesis  Null hypothesis o 4. Test hypothesis Scientific Method: Observational vs. Experimental  Observational o Naturalistic observations  Seeing what occurs in real life.  Tells you about human behavior.  Drawback: It is hard to measure and assume how they feel. You have to  wait for the behavior to occur. Does not tell you if what they are doing  really makes
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