A study is done to assess the effects of a new medication on the resting heart rate of dogs. Two breeds will be used in the study because of the availability of experimental subjects, even though the researcher is not interested in the differences in the medication's effectiveness between breeds. What type of experimental design should be used?
A)no blinding; no blocking
B)no blinding; blocking on dog breed
C)double blind; no blocking
D)double blind; blocking on dog breed

Question

Quizplus · Accepted Answer

In order to control for potential differences in the resting heart rate between breeds, blocking on dog breed should be implemented. However, blinding is not necessary in this study as the heart rate can be objectively measured without influence from the researcher's subjective perceptions.

A Study Is Done to Assess the Effects of a New