Professor Russel wants to examine the effectiveness of his new reading instruction method for third graders. He locates two third grade classes in the same school. He assesses all students' current reading ability at the start of the school year. He then has one classroom utilize his new instruction method while the other classroom uses the traditional method. At the end of the school year, Professor Russell assesses reading ability once again and compares group differences. The design of this study exemplifies which of the following?

Question

Quizplus · Accepted Answer

This study is an example of a nonequivalent control group design because it involves comparing the outcomes of two groups (one using a new instruction method and the other using a traditional method) without random assignment to groups. The groups were pre-existing classes, making them inherently nonequivalent.

Professor Russel Wants to Examine the Effectiveness of His New