Point The ideal form of the scientific method is lab experiements, because they enable researchers to control all variables. We manipulate the independant variable and observe if it effects the dependant variable. Data can also be collected in controlled observations
Explain If we control variables and try to reduces the amount of extraneous variables this allows researchers to establish cause and effect relationships. As a scientific method it is funadmental that we can test measurable hypothesis, if not then it is questionable whether it is regarded as scientific. This then allows researchers to support or refute their theories, setting a solid scientific foundadtion to their views.
Example For example systematic desensitisation, Lang and Lavovik did an experiement whos aim was to cure a phobia. There were a set number of controlled stages, which ensured that the results were reliable. It meant that There were no extraneous variables and that the results were easily reproducable by other people.
Extra (A*) If the study had been in a different enviroment- for example a field experiment would have been much less reliable as the results may have been affected.
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