One additive/interaction threat to the nonequivalent comparison-group design might occur is one group of participants becomes more experienced, tired, or bored than those in the other group. What is this threat?
a. Selection-attrition
b. Selection-maturation
c. Selection-instrumentation
d. Selection-regression
Question 2
If the local veterinarian inspects the rats during the experiment and finds them malnourished and their cages dirty. Who would be responsible for remedying the situation?
a) Karen
b) the IRB
c) the IACUC
d) Dr. Edelweiss
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In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv