When psychologists carry out research using human participants, precautions must be taken to ensure they are treated ethically.
In the UK, the BPS sets guidelines to what constitutes an ethical study and these must be followed by all researchers.
The purpose of these guidelines is to ensure participants are not harmed or exploited when taking part in research, and to avoid unethical research that have arisen in previous uncontrolled research.
However, in some situations following these guidelines may mean results are invalid.
Example; - If Asch revealed conformity to be his true aim participants may have produced demand characteristics, giving findings low internal validity.
If psychologists believe their research is so important the benefits to society outweigh any possible harm, a cost - benefit analysis is conducted.
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