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Rachel is studying the causes, consequences, and treatments of mental illness. She samples 100 people diagnosed with generalized anxiety disorder. She provides each individual in her sample with either a new untested drug, a placebo, or a nocebo (which occurs when a person expects negative side effects of a medication). Rachel measures sympathetic nervous system arousal a week before and a week after the study. The results of the study appear in the following graph.

Sagot :

1) The role that random assignment played is that; It ensured each participant had the same chance of being in each group

2) The research method that was used in the study was; An experiment

3) The new experimental drug was; Not effective

4) The elements that limit the generalizability of her study are; environmental factors of participants, length of time using drug, small sample size, and limited information about participants

What factors affect an experimental research?

From the graph attached showing the result of the study and from the parameters given in the question, we can say that;

1) The role that random assignment played is that; It ensured each participant had the same chance of being in each group which means that the results are more trustworthy as there are less chances for data skews based on unfair grouping of participants.

2) The research method that was used in the study was; An experiment

3) The new experimental drug can't be said to be effective, because from the graph, the results from the placebo and new drug are the the same which tells us that there was no affect on the levels of arousal with the new drug.

4) The elements that limit the generalizability of her study are; environmental factors of participants, length of time using drug, small sample size, and limited information about participants. These could all affect the generalizability because they could vary based on sample size.

Read more about Experimental Research at; https://brainly.com/question/15402972

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