internal validity Flashcards

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1
Q

what is internal validity

A

the extent to how confident you can be that a cause and effect relationship is established due to the iv acting on the dv only

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2
Q

how can we improve internal validity

A

how we can increase the control in a study to establish greater confidence in a causal relationship

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3
Q

what are specific ways to improve internal validity

A

randomisation - random allocation
standardisation
lab experiment
double blind procedure

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4
Q

what threatens internal validity

A

demand characteristics, investigator effects, extraneous/confounding variables, leading questions

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5
Q

what does face validity assess

A

does the test measure what its supposed to measure
done by eyeballing experiment or passing it to an expert to check

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6
Q

what does concurrent validity assess

A

the extent to which a psychological measure is similar to another existing measure and obtains close results

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7
Q

what does content validity assess

A

the extent to which a test measures a represntative sample of the subject matter or behaviour under investigations (eg your studying apple juices and you use orange instead of apples which is wrong)

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8
Q

improving internal validity:

A
  1. closed questions can provide quantifiable data to be collected that can then be statistically analysed, and individual can provide ‘same’ answer
  2. distributing to a large sample or interviewing large numbers of people increases content validity.
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