Kristoffer Geyer

Do smartphone usage scales predict behavior?

David A. Ellis, Brittany I Davidson, Heather Shaw et al. · International Journal of Human-Computer Studies · 2019 · 309 citations · Full text

Public Health, Behavioral Sciences, Psychology +17

Quantifying smartphone “use”: Choice of measurement impacts relationships between “usage” and health.

Heather Shaw, David A. Ellis, Kristoffer Geyer et al. · Technology Mind and Behavior · 2020 · 52 citations · Full text

Social Sciences, Psychology, Health Assessment +4

Open-source smartphone app and tools for measuring, quantifying, and visualizing technology use

Kristoffer Geyer, David A. Ellis, Heather Shaw et al. · Behavior Research Methods · 2021 · 33 citations · Full text

Computing, Psychology, Social Psychology +15

A simple location-tracking app for psychological research

Kristoffer Geyer, David A. Ellis, Lukasz Piwek · Behavior Research Methods · 2018 · 32 citations · Full text

Computing, Psychology, Social Psychology +13