Improving reliability and validity

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Improving Reliability

  • Carry out a pilot study

A pilot study is a small-scale trial of the research design, tried out on a few people before the real thing, therefore the researcher can identify any problems with the design.

  • Reduce investigator effect

Anything that the investigator does that has an unintentional effect on the participant's performance in the task. This can be reduced by having a set of standardised instructions that are read by each participant.

Improving Validity

Validity refers to


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