Relabeling Validity. Some History 1963 - Campbell & Stanley.

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Presentation transcript:

Relabeling Validity

Some History Campbell & Stanley

Some History Campbell & Stanley Two types of validity - Internal - External

Some History Campbell & Stanley Two types of validity: - Internal - External Cook & Campbell

Some History Campbell & Stanley Two types of validity: - Internal - External Cook & Campbell InternalExternal

Some History Campbell & Stanley Two types of validity: - Internal - External Cook & Campbell InternalExternal ConclusionInternalConstructExternal

Relabeling Internal Validity Internal Campbell, 1986

Relabeling Internal Validity Internal Local modal causal validity Campbell, 1986

Local Modal Causal Validity Only applies to current study -- zero generalizability Can apply to hodgepodge composite programs Still concerned with ruling out alternative explanations Local Modal Causal

Relabeling External Validity External Campbell, 1986

Relabeling External Validity External The principle of proximal similarity Campbell, 1986

Principle of Proximal Similarity A reaction to the sampling theory of generalizability Based on the natural science model of high internal validity Places current study within a generalizability space Views generalization as a question of degree

Proximal Similarity OurStudy

OurStudy TimesPeople Places Settings

OurStudy TimesPeople Places settings Lesssimilar Lesssimilar Lesssimilar Lesssimilar

OurStudy Timespeople Places Settings Lesssimilar Lesssimilar Lesssimilar Lesssimilar Gradients of Similarity

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