Question

A wait-list design, using random assignment, is most helpful in dealing with which of the following threats to internal validity?

Select one:
a. Attrition
b. Maturation
c. History
d. Selection

Answer 1

A wait-list design with random assignment helps mitigate the threat of selection bias by ensuring no systematic differences between groups.

Step-by-step explanation:

A wait-list design, using random assignment, is most helpful in dealing with the threat of selection to internal validity. When participants are randomly assigned to either the treatment or wait-list groups, it ensures that there are no systematic differences between the groups in terms of characteristics that could influence the results. This makes it more likely that any observed effects of the treatment are due to the treatment itself and not other factors. Random assignment is a key component of a rigorous experimental design and helps to mitigate selection bias.