This chapter presents the uses of experimentation and the various types of experimental designs. It also discusses the advantages and disadvantages of the experimental method. After studying this chapter you will be able to understand: Uses for experimentation, advantages and disadvantages of the experimental method, seven steps of a well-planned experiment, internal and external validity with experimental research designs, three types of experimental designs and the variations of each. | Chapter 9 Experiments McGraw-Hill/Irwin Copyright © 2011 by The McGraw-Hill Companies, Inc. All Rights Reserved. This chapter presents the uses of experimentation and the various types of experimental designs. It also discusses the advantages and disadvantages of the experimental method. Learning Objectives Understand . . . Uses for experimentation. Advantages and disadvantages of the experimental method. Seven steps of a well-planned experiment. Internal and external validity with experimental research designs. Three types of experimental designs and the variations of each. 9- Experiments Challenge Perceptions “There is no such thing as a failed experiment, only experiments with unexpected outcomes.” Richard Buckminster Fuller, engineer and architect 9- PulsePoint: Research Revelation 45 The percent of smartphone users who check their e-mail before they get dressed. 9- See the text Instructors Manual (downloadable from the text website) for ideas for using . | Chapter 9 Experiments McGraw-Hill/Irwin Copyright © 2011 by The McGraw-Hill Companies, Inc. All Rights Reserved. This chapter presents the uses of experimentation and the various types of experimental designs. It also discusses the advantages and disadvantages of the experimental method. Learning Objectives Understand . . . Uses for experimentation. Advantages and disadvantages of the experimental method. Seven steps of a well-planned experiment. Internal and external validity with experimental research designs. Three types of experimental designs and the variations of each. 9- Experiments Challenge Perceptions “There is no such thing as a failed experiment, only experiments with unexpected outcomes.” Richard Buckminster Fuller, engineer and architect 9- PulsePoint: Research Revelation 45 The percent of smartphone users who check their e-mail before they get dressed. 9- See the text Instructors Manual (downloadable from the text website) for ideas for using this research-generated statistic. Causal Evidence Agreement between IVs and DVs Time order of occurrence Extraneous variables did not influence DVs 9- An experiment is a study involving intervention by the researcher beyond that required for measurement. The usual intervention is to manipulate some variable in a setting and observe how it affects the participants or subjects being studied. There is at least one independent variable (IV) and one dependent variable (DV) in a causal relationship. There are three types of evidence necessary to support causality. First, there must be an agreement between independent and dependent variables. The presence or absence of one is associated with the presence or absence of the other. Second, beyond the correlation of independent and dependent variables, we consider the time order of the occurrence of the variables. The effect on the dependent variable should not precede the manipulation of the independent variable. The effect and .
