Among the different types of experimental design are two general categories: true experimental designs and quasi- experimental designs. True experimental designs include more than one purposively created group, common measured outcomes, and random assignment. Quasi-experimental designs are commonly used when random assignment is not practical or…

In 1991, a study was conducted at Riverside City College (RCC), in California, to determine the development of science reasoning among students. A science reasoning test was administered at the beginning and again at the end of fall 1991 to two samples: a college-wide sample of 843 students enrolled in one of 55 courses, and a science-oriented…