What This Document Is
This document comprises lecture notes from Empirical Research in Communication (COMM 301L) at the University of Southern California, specifically focusing on the experimental method – Part 1 of a two-part series. It’s a deep dive into the core principles and practical considerations surrounding experimental design in communication research. The material explores how researchers can systematically investigate cause-and-effect relationships within the field.
Why This Document Matters
This resource is invaluable for students enrolled in communication research methods courses, particularly those focusing on quantitative approaches. It’s most beneficial when you’re learning about research design, preparing to develop your own experimental studies, or critically evaluating published research that utilizes experimental methodologies. Understanding these concepts is foundational for conducting rigorous and impactful communication research. It will also be helpful when you need to understand the strengths and weaknesses of different research approaches.
Common Limitations or Challenges
This lecture material provides a theoretical framework and overview of experimental methods. It does *not* offer step-by-step instructions for conducting a complete experiment, nor does it include pre-written research proposals or statistical analysis guidance. It focuses on the conceptual underpinnings and design considerations, rather than the practical execution of data collection and analysis. It also doesn’t cover all research methods – only experiments.
What This Document Provides
* A discussion of the core advantages and disadvantages of employing experimental research.
* An exploration of the key requirements for establishing causal relationships.
* An overview of factors that influence the level of control achievable in an experiment.
* An examination of different approaches to manipulating independent variables.
* A detailed look at techniques for ensuring group equivalence in experimental designs.
* Consideration of how to control for intervening variables that could impact research findings.
* An introduction to various experimental designs and their respective strengths and weaknesses.
