In a within-subjects experiment comparing two treatments, the researcher is concerned that the results may be confounded by outs
ide events that occur between the first and second treatments. One way to reduce the likelihood that internal validity will be influenced by an outside event is to ____.
According to my research on different experimental designs, I can say that based on the information provided within the question the best way to make sure that the internal validity will not be influenced by an outside event is to switch to a between-subjects design. This type of design is an experiment design that has two or more groups of subjects each being tested by a different testing factor simultaneously. Since they are done simultaneously it significantly reduces outside influence.
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The answer is B. chemicals. the reason its b is because A= bacteria but u have to clean the bacteria in the water so its not A and its not c. becouse that will be just turning the ice into water .so the answer is b. becouse we use chemicals everyday to get rid of bacteria and waste
A major side effect that stress can cause on the gastrointestinal
system is diarrhea. It increases the acid in the stomach and the mill of the
stomach to shut down making you feel nauseous. Stress can cause your colon to
react in an absurd way that gives way to diarrhea or constipation.
