Research Methods PP - Psyc 100 Research Methods Lecture...

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Psyc 100 Research Methods
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Lecture Outline Characteristics of Good Psychological Research Experimental Research Descriptive Research Correlational Research .
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Research Concepts Research: causes of behavior Theory refers to a systematic way of organizing observations; cause-effect in principle Hypotheses are proposed relations between variables (cause-effect relationships); lab-specific Variable : Any phenomenon that can vary along some dimension Continuous variable : varies continuously (body weight) Categorical variable : can take on fixed values (gender) .
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Measurement Issues in Research Measure : A concrete means by which to determine the value of a variable The variable “illness” can be defined as the number of times that a subject visits a clinic The variable “hunger” can be defined in terms of how long a subject has gone without food To operationalize a variable Measures of variables must be: Standardized Reliable : Produce consistent measurements Valid : Actually measure the variable of interest
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the Reliability of a Measure Test-retest reliability : Does the test give similar values if the same subject takes it two or more times? Internal consistency : Different items that measure the same variable should produce similar answers. Inter-rater reliability:
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Research Methods PP - Psyc 100 Research Methods Lecture...

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