Question

Why would a study involving continuous handrail support, oxygen uptake, and heart rate in women during submaximal step treadmill exercise be quasi-experimental in design versus experimental? the sample size was small randomization was not used in sample selection the dependent variables were not manipulated the independent variables were not manipulated?

Answer 1

The answer is : randomization was not used in sample selection. The major difference between experimental and quasi-experimental designs is lack of randomization in sampling selection.