- 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.
Validity refers to…