One Researcher Is Comparing Two Different Varieties of Genetically Engineered

One researcher is comparing two different varieties of genetically engineered tomatoes to determine whether one produces more food (by weight) than the other. A second researcher is comparing two different workplace training programs to determine whether one program produces a higher level of workplace motivation than the other. Explain why the first researcher is probably not concerned about reliability and validity of measurement, whereas the second researcher is likely concerned with these measurements.