VALIDITY Accuracy meaningfulness and credibility Considering the Validity

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VALIDITY Accuracy, meaningfulness, and credibility

VALIDITY Accuracy, meaningfulness, and credibility

Considering the Validity of your Method � � Does the study have sufficient controls

Considering the Validity of your Method � � Does the study have sufficient controls to ensure that the conclusions we draw are truly warranted by the data? Can we use what we have observed in the research situation to make generalizations about the world beyond that specific situation?

Internal Validity � � The extent to which the research design and data allow

Internal Validity � � The extent to which the research design and data allow the researcher to draw accurate conclusions about cause-and-effect and other relationships within the data. See p. 97 -98 in research book… Be aware of the “Hawthorne effect. ” To ensure internal validity, we must eliminate other possible explanations for the results we observe.

Ways to Increase Internal Validity � � A controlled laboratory study A double-blind experiment

Ways to Increase Internal Validity � � A controlled laboratory study A double-blind experiment Unobtrusive measures Triangulation

External Validity � � The extent to which the results apply to situations beyond

External Validity � � The extent to which the results apply to situations beyond the study itself In other words, can the conclusions be generalized to other contexts?

Ways to Enhance External Validity � � � A real-life setting A representative sample

Ways to Enhance External Validity � � � A real-life setting A representative sample Replication

Ethical Issues in Research � � � Protection from harm Informed consent Right to

Ethical Issues in Research � � � Protection from harm Informed consent Right to privacy Honesty Internal Review Boards

Guides for Choosing a Research Approach � Using your texts, make copies of tables

Guides for Choosing a Research Approach � Using your texts, make copies of tables 5. 1 and 5. 2…I will check this for a grade, AND you will have a quiz on the material from this power point and from the tables NEXT Wednesday (October 26).