PSCH 242 Lecture Notes - Lecture 10: Stopwatch, Sleep Deprivation, Espresso
Document Summary
Discussion 10 - the threats to internal validity. What confound(s) is most directly illustrated by each of the following examples? maturation: two classes of second graders are tested in september for their reading ability. One class is given a reading intervention, while the other is not. She gives half of the participants two cups of regular espresso and half of the participants two cups of decaf espresso. The decaf group showed an increase selection: fifty pregnant women respond to a newspaper advertisement placed by a researcher, which asks them to participate in a study on childbirth.
