Document Type

Conference Paper

Publication Date


Publication Title

Selected Papers and Presentations Presented at MODSIM World 2010 Conference Expo



Conference Name

MODSIM World 2010 Conference Expo, October 13-15, 2010, Hampton, Virginia


Using an eye tracker we examined decision-making processes during an internet search task. Twenty experienced homebuyers and twenty-five undergraduates from Old Dominion University viewed homes on a simulated real estate website. Several of the homes included physical properties that had the potential to negatively impact individual perceptions. These negative externalities were either easy to change (Level 1) or impossible to change (Level 2). Eye movements were analyzed to examine the relationship between participants' "stated preferences"[verbalized preferences], "revealed preferences" [actual decisions[, and experience. Dwell times, fixation durations/counts, and saccade counts/amplitudes were analyzed. Results revealed that experienced homebuyers demonstrated a more refined search pattern than novice searchers. Experienced homebuyers were also less impacted by negative externalities. Furthermore, stated preferences were discrepant from revealed preferences; although participants initially stated they liked/disliked a graphic, their eye movement patterns did not reflect this trend. These results have important implications for design of user-friendly web interfaces.


"No Copyright."

Original Publication Citation

Liechty, M. M., & Madhavan, P. (2011). Investigating intrinsic and extrinsic variables during simulated internet search. Paper presented at the MODSIM World 2010 Conference Expo, NASA Langley Research Center, Hampton, VA.