Hi there!

I study how habits and friction shape behavior. Behavioral and data scientist, currently at Oura Ring. You can read more about my work below or get in touch!

Asaf Mazar

Interests

  • Habits
  • Behavior change
  • Randomized experiments (A/B tests)
  • Causal inference
  • Machine learning
  • Friction
  • Wearables
  • Digital health
  • Survey and experiment design

Selected research

A hand reaching for a ceramic coffee mug on a sunlit desk.
Psychological Science 2022

Habits

Illusory feelings, elusive habits

Why do we reach for another cup of coffee? When we asked people, they said it's usually out of tiredness. When we examined their behavior over the course of a week, we found that habit strength matched or exceeded fatigue in predicting coffee drinking. People overlook habits in explanations of behavior.

Two phone feeds show steady likes on one screen and varying likes on the other.
Working paper

Habits

Consistent rewards outperform variable rewards in habit formation

Conventional wisdom suggests that habits form best in response to variable rewards rather than consistent ones. We challenge this view using large scale field data (N > 1M posts) and six pre-registered experiments. In the field and in the lab, consistent rewards promote long-term persistence more effectively than variable rewards. These findings question long-standing assumptions and highlight the role of predictability in habit learning.

Two homes are connected to the same vaccine clinic by routes of different lengths.
PNAS Nexus 2023

Friction · Health

Distance to vaccine sites is tied to decreased COVID-19 vaccine uptake

Small practical barriers can have large consequences for public health. People living farther from vaccination sites were less likely to get vaccinated (Study 1), and vaccine uptake increased when sites opened nearby (Study 2). Together, these findings highlight reducing friction as a practical tool for promoting vaccination, alongside efforts to address beliefs and intentions.