Jean Costa

Postdoctoral Scholar

Stanford University

I am a Postdoctoral Scholar in the Computer Science department at Stanford University, where I am a member of the HCI group and supervised by James Landay. I received my PhD in Information Science from Cornell University, where I was advised by Tanzeem Choudhury.

My research spans the areas of Human-Computer Interaction, Ubiquitous Computing, and Mobile Health. Much of my work focuses on designing, developing and evaluating unobtrusive mobile applications for health and well-being. I design subtle interventions that change how users perceive interoceptive (e.g., heart rate), behavioral (e.g., voice) or environmental cues (e.g., color of objects) for emotion regulation or behavior change.


  • Human-Computer Interaction
  • Ubiquitous Computing
  • Mobile Health


  • PhD in Information Science, 2019

    Cornell University



Wearable device that regulates anxiety unobtrusively using haptic feedback


Smartwatch app to improve cognitive performance in the moment using haptic feedback

Interpersonal Conflicts

Regulating anxiety during interpersonal conflicts using voice modulation

Alertness Scanner

Android application that infers alertness from pictures taken by smartphones