Sarah A. Kusumastuti

PhD student at University of Southern California

I am a graduate student in the Department of Psychology at University of Southern California. My research area is Quantitative Methods and my advisor is Dr. Richard John. I recieved my M.A. in Quantitative Psychology from the University of Southern California in 2016 and my B.Sc in Mathematical Statistics at Purdue University in 2014. I am originally from Riau, Indonesia.

You can find a more detailed version of this page on my CV.

Research Interests

Decision analysis, judgement and decision making, behavioral game theory, design of experiments, behavioral cybersecurity, deterrence, risk perception, computational modeling


2014 - Current

MA, PhD in Psychology

University of Southern California

Los Angeles, California


BSc in Mathematical Statistics

Purdue University

West Lafayette, Indiana



Research Assistant at USC CREATE

Los Angeles, CA

May-August 2018

Design Research Intern at Traveloka

Jakarta, Indonesia


Research Assistant at USC Information Sciences Institute

Marina del Rey, CA

June 2015 - May 2016

Research Intern at Sandia Research Corporation

Mesa, AZ

2012 - 2014

Undergraduate Research Assistant at Purdue University Computational and Cognitive Neuroscience Lab

West Lafayette, IN

June-August 2013

Undergraduate Research Assistant at Schewickert Lab, Purdue University Department of Psychology

West Lafayette, IN


University of Southern California

Graduate Teaching Assistant

PSYC339 - Origins of the Mind
PSYC316 - Non-Experimental Research Methods
PSYC274 - Statistics

Purdue University

Undergraduate Teaching Assistant

MA137 - Mathematics for Elementary Teachers I
MA138 - Mathematics for Elementary Teachers II
STAT417 - Statistical Theory


Kusumastuti, S., Rosoff, H., & John, R.S. (2018). Characterizing Conflicting User Values for Cyber Authentication using a Virtual Public Values Forum (in press)

Kusumastuti, S., Blythe, J., Rosoff, H. & John, R.S. (2018). Layering as a Deterrent to Cyber Attackers: A behavioral analog simulation game (manuscript under review)

Kusumastuti, S. & John, R.S. (2018). An Interactive Real-time Behavioral Game for Cyber Security (manuscript in preparation)

Kusumastuti, S., Cui, T., Tambe, A., & John, R.S. (2015, March). A behavioral game modeling cyber attackers, defenders, and users. AAAI Spring Symposium 2015 on Applied Computational Game Theory. PDF


Department of Psychology
3620 McClintock Ave
University of Southern California
Los Angeles, California, USA



Essential open source statistical programming language. RStudio is an excellent IDE


Versatile programming language. PyCharm (student edition) is my IDE of choice


Who knew that a text editor could be so simple yet powerful. I mostly use this to edit HTML and CSS.


platform for designing online interactive behavioral economics experiments (developed based on z-tree)


A platform, database and community for film lovers where you can track all the films you've watched, write reviews, and see what other people are watching. You can find me here

American Cinematheque

Los Angeles cinematic society with many film events and screenings at the Egyptian Theatre in Hollywood and Aero Theatre in Santa Monica (I volunteer here!)