An investigator wants to compare the reading comprehension of first-grade students who are taught reading by treatment A versus first-grade students taught reading by treatment B. He selects all first graders in Washington Elementary School (6 classes, N = 200) and places their names in a hat. The first 60 names taken from the hat are placed in treatment A, and the next 60 names are placed in treatment B. What procedure has the researcher used?
A) Simple random sampling
B) Random assignment
C) Cluster sampling
D) Stratified random sampling

Question

Quizplus · Accepted Answer

The researcher has used random assignment, which involves randomly allocating participants to different groups in an experiment. This method is used to ensure that each participant has an equal chance of being assigned to any group, thereby reducing selection bias and increasing the validity of the experimental results.

An Investigator Wants to Compare the Reading Comprehension of First-Grade