Week 5 Reading

Question 0

Threats to external validity: generalizing across features of a study

Answer 0

• novelty effect (of experiment)
• multiple treatment interference (practice and fatigue)
• experimenter characteristics

Question 1

Threats to external validity: generalizing across participants or subjects

Answer 1

• Selection bias: weirdos
• college students
• volunteer bias
• participants with similar characteristics
• cross-species generalization

Question 2

Threats to external validity: generalizing across features of the measure

Answer 2

• sensitization
• generality across response measures (e.g. diff definitions of fear)
• time of measurement