If a researcher created two groups by assigning the first 30 people to the experimental group and the last 30 people to the control group,this process would
A) lead to a directionality problem.
B) lead to a third variable problem.
C) violate the principle of random assignment.
D) violate the principle of random sampling.

Question

Quizplus · Accepted Answer

This process violates the principle of random assignment because participants are not randomly allocated to the experimental and control groups, which could introduce biases or systematic differences between the groups. Random assignment is crucial for controlling for confounding variables and ensuring that the groups are comparable at the start of the experiment.

If a Researcher Created Two Groups by Assigning the First