Dr Kgwadi is conducting a study to test the effect of a new drug on people's ability to concentrate at work.His research sample consists of 100 South African adults.During a 14-week period, half of the sample is administered the drug and the other half is administered a placebo, and participants' concentration abilities are continually tracked.In the context of this study, if Dr Kgwadi uses random assignment, it means that ____.
A)his study will be high in external validity
B)the 100 adults in his study are likely to be representative of the larger population of interest
C)each research participant has an equal chance of being assigned to each level of the independent variable
D)his research findings are likely to be statistically significant

Question

Quizplus · Accepted Answer

Random assignment means that each research participant has an equal chance of being assigned to each level of the independent variable, in this case either receiving the drug or the placebo. This helps to control for potential biases or confounding variables and increases the internal validity of the study. It does not necessarily guarantee external validity or statistically significant findings.

Dr Kgwadi Is Conducting a Study to Test the Effect