Graham recruited student volunteers to participate in his dissertation study. He set up several times for students to come to a specified classroom and read various types of instructional materials and to be tested. He ran all of his control conditions first and then for each session he placed all students at the session in the same treatment condition. This is problematic because those who volunteered early are likely different than those who volunteered later. This problem is primarily due to

Question

Quizplus · Accepted Answer

The problem described in the scenario is due to sampling bias, as the specific type of participants that volunteered early on may not be representative of the larger population of potential participants.

Graham Recruited Student Volunteers to Participate in His Dissertation Study