Listening test 5 part 5

RESEARCH METHODS	Strengths	Weaknesses
IN THE LABORATORY e.g. medical research	The environment is 22. It is easier to isolate key variables. The researcher can use 23.	Constraints affect the ecological validity. Subjects must agree to participate, so there may be a possible distorting effect on 24.
IN THE FIELD or 21. setting, e.g. family research	Good ecological validity	There may be unwanted effects, e.g. 25. in a sleep experiment. 26. the research can be difficult.