Disadvantages of the Scientific Method PLAN


Lacks internal validity

Psychologial research is fraught with problems such as investigator effects and demand characteristics

-These compromise the validity of research 

DISADVANTAGE: observed effects may be due to variables other than the research

EXAMPLE: questionnairs may involve leading questios, which means the findings are not valid 

Lacks external validity

Findings from psychological experiments are not always supported by real life every day observations. 

-suggests findings from psychological research cannot be generalised beyond pariticular settings 

EXAMPLE: Mandle said that Milgram's relationship to the behaviour of the real world- not everyday obidence is tested through the harming of others.


In order to conduct psychological research, behaviour must be reduced to a set of individualised variables.

-This is true


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