Cory K. Costello

Senior Data Scientist

Nielsen Corporation


I am Psychological Scientist by training, currently working as a Senior Data Scientist at the Nielsen Corporation, where I use my expertise in statistics, data science, and behavioral science to contribute to Nielsen’s audience measurement products. I was previously a postdoctoral fellow in the Emotion and Self-Control Lab (PI: Ethan Kross) at University of Michigan’s Department of Psychology. Prior to that, I was a PhD student in the Personality and Social Dynamics Lab (PI: Sanjay Srivastava) at the University of Oregon’s Department of Psychology. I spent my time in academics learning to apply complex data analytic techniques - social network analysis, predictive modelling / machine learning, text analysis, structural equation modelling, hierarchical linear modelling - to answer questions about personality, emotion, and reputation.


  • Personality, Interpersonal Perception & Reputation
  • Data Science, Statistics, & Machine Learning


  • PhD in Personality/Social Psychology, 2020

    University of Oregon

  • MA in Psychology, 2014

    Wake Forest University

  • BA in Psychology, 2012

    New College of Florida (The State's Honors College)














Senior Data Scientist


Aug 2021 – Present Oldsmar, FL (remote)
  • Senior Data Scientist conducting end-to-end research on audience measurement products.

Postdoctoral Fellow

University of Michigan

Aug 2020 – Jun 2021 Ann Arbor, MI
  • Postdoctoral Fellow in Emotion and Self-Control Lab (PI: Ethan Kross)
  • Conducted research on emotions and emotion regulation in online social networks and offline in daily life.

Graduate Employee

University of Oregon

Oct 2014 – Jul 2020 Eugene, OR
  • Teaching Fellow, with experience teaching data analysis and R.
  • Research Fellow, with experience working on NSF- & NIH-funded grants on Personality, Mental Health, and Digital Footprints (PI: Sanjay Srivastava).
  • Across roles, extensive experience in data collection, analysis, and communicating complex statistical concepts to different audiences.

Graduate Research Assistant

Wake Forest University

Sep 2012 – May 2014 Winston-Salem, North Carolina
  • Assisted with grant on probabilistic decision making (Supervisor: Eric Stone).
  • Assisted with grant on study of character & morality (PIs: R Michael Furr, William Fleeson).
  • Across roles, experience in data collection, analysis, and reporting.

Teaching Assistant

New College of Florida

Feb 2012 – May 2012 Sarasota, FL
  • TA for Social Science Research Lab, where I principally held office hours for statistical consultation for advanced undergraduate students.
  • TA for Laboratory in Social and Personality Psychology, where I assisted instructor with grading and support.

Research Assistant

New College of Florida

Sep 2011 – May 2012 Sarasota, FL
  • Research assistant in the Office for Institutional Research and Assesment.
  • Collated and reported on data relevant to student retention.


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Recent Posts

Spotify API Fun Vol 1

Comparison of Spotify recommended artist network to Twitter co-follower network



Network Approach to Reputations

A Naturalistic, laboratory paradigm for studying the spread of reputational information.

Personality Stability & Change (Life & Time)

Work examining longitudinal personality change and stability in the life and time project

Twitter Project

A project examining how mental health, personality, reputation are manifest on Twitter and recoverable from corresponding digital …

Recent & Upcoming Talks

Do You Feel Like Who You Follow? A Network Approach to Predicting Individual Differences in Mental Health on Twitter

Research linking personality traits to digital records of online behavior in OSNs like Facebook and Twitter has grown rapidly in recent …

Longitudinal Stability and Change in the Big Six

The maturity principle and cumulative continuity principle have been fundamental in understanding adult development of personality …

Consensus, Accuracy, and Consequences of Hearsay Reputations

Gossip and hearsay enable reputations to extend beyond people who have met, but little is known about the resulting reputations. Across …

Recent Publications

Quickly discover relevant content by filtering publications.

Predicting Mental Health from Followed Accounts on Twitter

The past decade has seen rapid growth in research linking stable psychological characteristics (i.e., traits) to digital records of …

Perceiving Personality Through the Grapevine: A Network Approach to Reputations

Reputations are critical in human social life: they allow people to share and act on information about one another, even when they have …

Ethics-Relevant Values in Adulthood: Longitudinal Findings from the Life and Time Study

In a large, nationally-representitive sample, we find mean-level change toward more inclusive value priorities and high rank-order …


  • Department of Psychology, Univsersity of Michigan, 530 Church Street, Ann Arbor, MI, 48109, United States
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