Types of validity Flashcards
Construct validity
Characterises the quality of operationalisation
HIGH when leap(construct to operationalisation) is justified and if the operationalisation is able to provide sufficient coverage of the construct
Internal validity
Extent to which it can be claimed that research outcomes are a result of the experimental treatment and refers to how clearly the study establishes causality between the IV and the DV
HIGH when confounding variables have been controlled and are certain that change in the IV caused change in the DV
The less bias, the higher the internal validity of the experiment
External validity
Generalisability of the findings in the experiment beyond the sample to other people and other settings
2 types: Population, Ecological
Population validity
Refers to the extent to which the findings can be generalised from the sample to the target population
HIGH when sample is representative of the target population and appropriate sampling technique is used
Ecological validity
Refers to the extent to which the findings of the experiment can be generalised from the experiment to other settings to other settings or situations
If you increase ecological validity, you can lose control over confounding variables
Credibility
The degree to which the results of the study can be trusted to reflect the reality
Generalisation
Refers to the extent to which the results of the study can be applied beyond the sample and settings to a larger group of people
Reliability
refers to how consistently a study, test or measure produces the same results
Types of reliability
Internal reliability
Test-retest reliability
Inter-rater reliability
Construct
Any theoretically defined variable that cannot be directly observed
Operationalisation
expression of a construct in terms of observable behaviour
