Types of validity Flashcards
Validity
-the extent to which an observed effect is genuine
└does it measure what it is supposed to measure (internal validity)
└can it be generalised (external validity)
Types of validity
List
Internal validity External validity └Ecological validity └Temporal validity Face validity Concurrent validity
Internal validity
- does it measure what it is supposed to measure
- if effects on dependent variable are due to manipulation independent variable not some other measure
External validity
-can it be generalised
└to other settings and situations (ecological)
└to other historical times and eras (temporal)
Types of external validity
List
Ecological validity
Temporal validity
Temporal validity
- form of external validity
- the extent to which findings from a research study can be GENERALISED to other HISTORICAL TIMES AND ERAS
Assessment of validity
List
- face validity
- concurrent validity
Concurrent validity
-the extent to which a psychological measure relates to an existing similar measure
Face validity
- basic form of validity
- if a measure appears to measure what it is supposed to measure
Improving validity
Experimental research
-use control group
└can see if effects on dependent variable are due to manipulation independent variable not some other measure
-standardise procedures
└reduce participant reactivity and investigator effects
-single/double blind procedures
└reduce demand characteristics/ investigator effects
Improving validity
Questionnaires
-anonymous
-lie scale within questions
└to control social desirability bias
Improving validity
Observations
-covert observations
└more natural behaviour
-operationalized behavioural categories
└non-overlapping
Improving validity
Qualitative methods
- direct quotes
- using multiple sources of evidence
