What makes the study by Christman et al.titled "Continuous handrail support,oxygen uptake,and heart rate in women during submaximal step treadmill exercise" quasi-experimental in design versus experimental?
A) The sample size was small.
B) Randomization was not used in sample selection.
C) The dependent variables were not manipulated.
D) The independent variables were not manipulated.

Question

Quizplus · Accepted Answer

Correct B: The major difference between experimental and quasi-experimental designs is lack of randomization in sampling selection.
Incorrect A: The size of the sample does not primarily affect the nature of the study design.
Incorrect C: Dependent variables or outcome variables are not manipulated.
Incorrect D: Independent variables (or the treatment)must be manipulated to conduct an experiment or quasi-experiment.

What Makes the Study by Christman Et Al