TAILIEUCHUNG - Lecture Communication research: Asking questions, finding answers: Chapter 8 - Joann Keyton

Chapter 8 - Quantitative research designs. After reading this chapter, you should be able to: Select and develop the appropriate research design for your hypotheses or research questions; understand the strengths and limitations of each design form as it relates to research fi ndings, and argue for your design choices; explain the benefi ts of experimental forms over quasi-experimental and descriptive forms;. | Chapter 8 Quantitative Research Designs Copyright c 2001 The McGraw-Hill Companies, Inc. The Experimental Framework Used to determine causation Conducted in lab or other controlled setting To control for extraneous influences Independent variable is manipulated by researcher Participants randomly assigned to conditions or treatments Copyright c 2001 The McGraw-Hill Companies, Inc. The Classical Experiment Researcher controls Selection of treatment & control groups – based on theory Random assignment of participants to conditions – ensures participants in each condition are equivalent before any treatment Manipulation checks Copyright c 2001 The McGraw-Hill Companies, Inc. Posttest Experimental Design Copyright c 2001 The McGraw-Hill Companies, Inc. Pretest-Posttest Experimental Design Copyright c 2001 The McGraw-Hill Companies, Inc. Factorial Experimental Design Treatment groups based on two or more independent variables Dependent variable measured once after .

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