research methods and statistics psych chunk 3
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16 Terms
Descriptive research
Research that includes case studies, surveys, and observation to provide natural information.
Pro of Descriptive research
Gives natural information; serves as a good starting point.
Con of Descriptive research
Cannot show cause-and-effect.
Correlational research
Research that examines relationships between variables.
Pro of Correlational research
Helps make predictions.
Con of Correlational research
Does not prove cause-and-effect.
Experimental research
Research where the researcher changes one variable and measures its effect on another.
Pro of Experimental research
Provides the strongest evidence for cause-and-effect.
Con of Experimental research
May not reflect real life perfectly.
Operational definition
A clear definition of how a variable is measured.
Reliability
The consistency of results.
Validity
The accuracy of results; measuring what you intend to measure.
Mean
The average score in a set of data.
Median
The middle score in a set of data.
Mode
The most common score in a set of data.
Standard deviation (SD)
A measure that shows how spread out the scores are.