Validity

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Define validity.
Validity is concerned with the extent to which the researcher is measuring what they are claiming to measure.
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Define internal validity.
Internal validity is concerned with whether the effects seen in the DV is due to the IV. Concerned with what goes on within the study.
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Define external validity.
External validity is concerned with the extent to which findings can be generalised. Concerned with what goes on outside of the study.
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What 4 things can threaten internal validity?
Extraneous variables. Demand characteristics. Experimenter bias. Poorly operationalised variables.
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What are the two type of external validity?
Ecological validity and population validity.
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What is ecological validity?
Being able to generalise findings to other settings.
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What is population validity?
Being able to generalise findings to other populations.
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What 4 ways can you assess validity?
Construct validity, face validity, concurrent validity, predictive validity.
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Define construct validity.
Where an assessment is made of whether a study really measure the 'construct' that it is supposed to be measuring.
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Define concurrent validity.
Where a new method is compared to an already established method known to work. If a positive correlation is found between the two then there is validity.
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Define face validity.
Where an expert looks at the research and confirms that it does measure what it claims to measure.
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Define predictive validity.
Refers to whether the findings will predict future results, as if they will then they have validity.
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What 4 things can improve internal validity?
Use measurements which are already established as having validity. Ensure studies are carefully controlled. Use single blind or double blind techniques.
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What 2 things can improve external validity?
Use everyday tasks which have realism. Use representative samples.
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Other cards in this set

Card 2

Front

Define internal validity.

Back

Internal validity is concerned with whether the effects seen in the DV is due to the IV. Concerned with what goes on within the study.

Card 3

Front

Define external validity.

Back

Preview of the front of card 3

Card 4

Front

What 4 things can threaten internal validity?

Back

Preview of the front of card 4

Card 5

Front

What are the two type of external validity?

Back

Preview of the front of card 5
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