Threats to internal validity of quasi-experiments include
A)failure of randomization.
B)failure to follow the treatment protocol.
C)attrition.
D)all of the above with some modifications from true randomized controlled experiments.

Question

Quizplus · Accepted Answer

Quasi-experiments lack the random assignment of participants to treatment and control groups, which can lead to threats to internal validity such as failure of randomization, failure to follow the treatment protocol, and attrition. Therefore, all of the above options are correct. However, some modifications may be made from true randomized controlled experiments.

Threats to Internal Validity of Quasi-Experiments Include