Electrical brain stimulation has shown promise in treating some neurological dis

Question

Electrical brain stimulation has shown promise in treating some neurological disorders. Researchers want to know if this could be an effective therapy for Parkinson's disease. The researchers conduct a small-N study and find that tremors reduce after treatment. What are some questions you might ask to interrogate the four validities and which validities do they correspond to? O a) How did the researchers measure the tremors?- internal validity O b) By what amount did the tremors reduce? 10%750%?-construct validity O Did the researchers control for other variables such as whether participant(s) was/were taking medications for the disease like dopamine? statistical validity d) Did the researchers repeat the experiment on more than one participant?-external validity

Explanation / Answer

In construct validity researcher can make good observation when they avoid observer bias,observer effects and reactivity.Internal valisity is the confidence that we can place in the cause and effect relationship,There is a causal relation between the two if they are properly demonstrated.Statistical validity refers to the conclusions that can be made with statistical and scientific laws.External validity is the extent to which the results of the study can be generalized to other situations and to other people.We need to find out if the researchers control other variables such as whether participants were taking medications like dopamine.

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