Chapter 9: Theory of Reasoned Action/Theory of Planned Behavior and Integrated Behavioral Model

By: Merlin Mathew, King Li, Jennifer Kloosterman, Abbie Albright, Noah Taddesse



  • Discuss the history of the Theory of Reasoned Action (TRA), Theory of Planned Behavior (TPB), and the Integrated Behavior Model (IBM).
  • Explain the main constructs of each model.
  • Discuss how to measure the constructs.

“Whether or not an attempt is made to perform a given behavior and the strength of that attempt are determined in an immediate sense by the intention to try performing the behavior.”

 – Icek Ajzen