MS Defense by Atiyya Shaw

Event Details
  • Date/Time:
    • Tuesday August 14, 2018 - Wednesday August 15, 2018
      3:00 pm - 4:59 pm
  • Location: JS Coon 217
  • Phone:
  • URL:
  • Email:
  • Fee(s):
  • Extras:
No contact information submitted.

Summary Sentence: Applying Item Response Theory to Measure Drivers’ Perceived Complexity of Roadway Environments

Full Summary: No summary paragraph submitted.

Name: Atiyya Shaw

School of Psychology Master's Thesis Defense Presentation

Date: Tuesday, August 14, 2018

Time: 3:00pm

Location: JS Coon 217



Professor James Roberts, Ph.D. (Georgia Tech)


Thesis Committee Members:

Professor James Roberts, Ph.D. (Georgia Tech)

Professor Susan Embretson, Ph.D. (Georgia Tech)

Professor Michael P. Hunter, Ph.D. (Georgia Tech)


Title: Applying Item Response Theory to Measure Drivers’ Perceived Complexity of Roadway Environments

Roadway environments constitute visually complex systems within which users make split-second critical decisions on a daily basis. As such, understanding transportation system user perception and performance across varied roadway environments is crucial for a broad array of transportation research and engineering purposes (e.g. understanding safety data trends, informing roadway design guidelines, etc.). This thesis applies item response theory (IRT) to identify and interpret the dimensions present that influence drivers’ perceived complexity of roadway environments. We find that a four dimensional polytomous Graded Response Model best measures this data, and were able to ascertain that participants’ perceived complexity ratings were most affected by their perception of freeway and urban environments, as well the visibility and traffic conditions of the particular roadway. This study enables not only an understanding of the factors that influence driver perception of the built environment, but demonstrates an application of multidimensional, polytomous IRT to study transportation system user perception, one of the first known implementations of multidimensional IRT within transportation engineering.


Additional Information

In Campus Calendar

Graduate Studies

Invited Audience
Faculty/Staff, Public, Graduate students, Undergraduate students
ms defense
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Apr 26, 2018 - 9:09am
  • Last Updated: Aug 1, 2018 - 2:30pm