research design: causal studies l quick review: three general forms of quantitative research studies...

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Research Design: Causal Studies Research Design: Causal Studies Quick Review: Three general forms of Quick Review: Three general forms of quantitative research studies quantitative research studies Descriptive: Descriptive: Describes a situation Describes a situation Relational Relational : Relationship between variables : Relationship between variables Causal: Causal: Seeks to show a cause and effect. Seeks to show a cause and effect. Internal Validity Internal Validity : : The approximate truth of The approximate truth of inferences regarding inferences regarding cause-effec cause-effec t t or or causal causal relationships. relationships. Establishing Cause & Effect Single-Group Threats Multiple-Group Threats “Social” Interaction Threats Research Design & Design Notations

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Establishing a Cause-Effect Relationship

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Page 1: Research Design: Causal Studies l Quick Review: Three general forms of quantitative research studies Descriptive: Describes a situation Relational :

Research Design: Causal StudiesResearch Design: Causal Studies Quick Review: Three general forms of quantitative Quick Review: Three general forms of quantitative

research studiesresearch studies– Descriptive: Descriptive: Describes a situationDescribes a situation– RelationalRelational : Relationship between variables : Relationship between variables– Causal:Causal: Seeks to show a cause and effect. Seeks to show a cause and effect.

Internal ValidityInternal Validity: : The approximate truth of inferences The approximate truth of inferences regarding regarding cause-effeccause-effectt or or causalcausal relationships. relationships.– Establishing Cause & Effect– Single-Group Threats– Multiple-Group Threats– “Social” Interaction Threats

Research Design & Design Notations

Page 2: Research Design: Causal Studies l Quick Review: Three general forms of quantitative research studies Descriptive: Describes a situation Relational :