I am Associate Professor of Behavioral Science and Director of the Institute of Behavioral Science and Technology at the University of St. Gallen, Switzerland.
Before, I worked as postdoctoral researcher at the Media and Personality Lab (Gabriella Harari) at the Department of Communication at Stanford University and at the Department of Psychology at the Ludwig-Maximilians-Universität München (Markus Bühner).
I am specialized in the investigation of human behavior, personality traits, and other individual differences, with methods from the computational and social sciences. I use machine learning and computational modeling to describe, explain, and predict human behavior and psychological traits.
I am concerned with how computational methods and AI can be used to improve and facilitate people's lives, how human-computer interaction can be improved by considering individual differences, and what consequences the widespread (and unreflected) use of computational systems can have on individuals and society at large.
News & Updates
Talk at European Conference of Personality (ECP)
15.07.2022, Madrid, EU
On the last day of ECP20, I presented latest results from our ongoing research project on behavioral sequences and the predictability of digital daily behaviors.
Workshop on Mobile Sensing and Machine Learning at the EAPP Summer School of Personality Science (SSPS)
05.07.2022, Madrid, Spain, EU
I was happy to teach part of the EAPP Summer School on Personality Science together with Gabriella Harari.
Visiting Research Stay at the University of Bergen and talk at the Bergen Future Week at Media City Bergen
15.07.2022, Bergen, Norway
I was invited to spend a month of my time as a visiting researcher at the University of Bergen, hosted by Marija Slavkovic.
During my time in Bergen, I also had the opportunity to give a very short talk about smartphones and personality traits at Media City Bergen. Such a cool and modern venue in such an old and historic city.
Invited Talk at the Natural Science Museum in Berlin
22.04.2022, Berlin, Germany, EU
I was quite an experience to talk about my research in the at the Museum für Naturkunde at Berlin.
The video was created and provided to me by a kind visitor, unfortunately it is very low quality :(.
Invited talk at the ECNP New Frontiers in Digital Health Meeting
21.03.2022, Online/Nice, France, EU
I gave a talk on data collection with smartphones – beyond state-of-the-art.
19.02.2022, Online/San Francisco, CA, USA
I gave a talk on how daily behaviors can be represented as temporal sequences.
Invited talk at the University of Amsterdam
04.05.2021, Online/Amsterdam, Netherlands, EU
Angelika Stefan invited me to give a guest lecture about my research at the Mellenbergh lecture series at the Psychological Methods Department at the University of Amsterdam.
Invited talk at MediaFutures
20.04.2021, Online/Bergen, NO
Marija Slavkovic invited me to give a talk at the new MediaFutures research center in Bergen, Norway.
Machine Learning Workshop at the UZH
29. & 30.03.2021, Online/Zurich, CH
Together with Florian Pargent, I gave the all-new version of our Introduction to Machine Learning in R workshop (featuring the new mlr3) for the OB reading group of Jochen Menges/Lauren Howe, at the University of Zurich.
Invited talk at the Interdisciplinary Center for Educational Research (IZBF)
Matthias Ziegler invited me to give a talk about mobile personality sensing at the IZBF in Berlin, Germany.
SPSP 2021 Convention
I am exited that I will be giving a talk on talk on explainable machine learning for mobile personality sensing at SPSP pre-conference on the Psychology of Media and Technology.
I will also give another talk on explainable machine learning in the professional development session New Developments in Psychological Assessment and How to Use Them,organized by Sandra Matz (Columbia Business School) and Friedrich Götz (Cambridge University).
Invited talk at the University of Regensburg
17.12.2020, Online/Regensburg, DE, EU
I gave an invited talk on mobile sensing in educational research in the colloquium of Prof. Sven Hilbert, at the University of Regensburg.
Invited talk at the University of Hamburg
15.12.2020, Online/Hamburg, DE, EU
I gave an invited talk on mobile sensing in personality psychology in the colloquium of Prof. Jenny Wagner, at the University of Hamburg.
Our work featured in FORBES
Machine Learning workshop
25.08.2020, Online/Zurich, CH
I gave a online short-version of the Introduction to Machine Learning in R workshop (developed by myself and Florian Pargent) at the University of Zurich.
USC - Summer School
04.08.2020, Online/Santa Barbara, CA, USA
I will be giving a talk on the predictiveness of behavioral smartphone data for personality traits, at the USC - summer school on Sensor-Based Behavioral Machine Learning
Our Research on Personality Prediction from Daily Behavior was published in PNAS
Stachl, C., Au, Q., Schoedel, R., Samuel. D. Gosling, Gabriella. M. Harari., Buschek, D., Völkel, S., Schuwerk, T., . . . Bühner, M. (2020). Predicting Personality from Patterns of Behavior Collected with Smartphones. Proceedings of the National Academy of Sciences of the United States of America (PNAS). https://doi.org/10.1073/pnas.1920484117
New articles out
Stachl, C., Pargent, F., Hilbert, S., Harari, G. M., Schoedel, R., Vaid, S., … Bühner, M. (2020). Personality Research and Assessment in the Era of Machine Learning. European Journal of Personality, per.2257. https://doi.org/10.1002/per.2257
Schoedel, R., Pargent, F., Au, Q., Völkel, S. T., Schuwerk, T., Bühner, M., & Stachl, C. (2020). To Challenge the Morning Lark and the Night Owl: Using Smartphone Sensing Data to Investigate Day–Night Behaviour Patterns. European Journal of Personality, per.2258. https://doi.org/10.1002/per.2258
Völkel, S. T., Schödel, R., Buschek, D., Stachl, C., Winterhalter, V., Bühner, M., & Hussmann, H. (2020). Developing a Personality Model for Speech-based Conversational Agents Using the Psycholexical Approach. Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems, 1–14. https://doi.org/10.1145/3313831.3376210
Pre-Conference on Personality Dynamics, Processes, and Functioning
27.02.2020, New Orleans, LA, USA
I am organizing a symposium on "Big Data, Machine Learning and Mobile Sensing - New Directions in Personality Research", featuring Ramona Schödel (LMU-Munich, Psychology) and Poruz Khambatta (Stanford Business School).
I am giving a guest lecture on personality sensing with smartphones in the human factors seminar of Ramona Schödel at Ludwig-Maximilians-Universität München.
I will start my new position and will join Gabriella M. Harari's team at the media and personality lab at Stanford University.
30.09.2019 - 02.10.2019
Uni-Saarland, Saarbrücken, Germany.
. 30.09.2019. I will give a talk on the importance of interpretable machine learning for research and assessment in psychology.
02.10.2019, 18:30h. I will be participating in a panel discussion on explainable AI.
DPPD 2019, Dresden, Germany
14.09. - 18.09.2019
15.09.2019, 9:00-17h. Prior to the DPPD20199 conference, Ramona Schödel and I will provide "An Introduction to Machine Learning for Psychologists in R" in a preconference workshop. More infos are provided via this OSF-repository.
16.09.2019. For my work on the usage of smartphones for personality research and assessment, I was awarded with the "Award for Digital Assessment" by the Division for Personality and Psychological Assessment of the German Psychological Society (DGPS).
17.09.2019, 11:00h. I will be giving a presentation on "Machine Learning for Personality Assessment" at Le Vy Phan's symposium on Challenges in and Approaches to Behavioral Assessment & Prediction.
Presentation at the ECDP Big Data special event in Athens.
Together with Sabine Walper, I will talk about the potential of mobile sensing methods for continous high-frequent data collection in developmental psychology.
Presentation at the DPPD Post-Doc workshop at the GESIS institute in Mannheim.
I will present results from our teams latest study on the prediction of big five personality traits from a wide range of smartphone-sensed behaviors.
Presentation at the 1st workshop on mobile apps and sensors in surveys (MASS) at the University of Mannheim.
I will introduce the LMU-PhoneStudy mobile-sensing research system and presents how data from mobiles sensors can be used cojointly with classical measures from surveys.
Presentation at the 2019 SPSP Annual Convention.
I will give a(n) (unfortunately remotely) talk on the predictability of personality traits from every-day smartphone usage in the symposium "Using RealWorld Behavioral Data to Advance Psychological Research and Theory", chaired by Christine Anderl,
Machine Learning Workshop at the University of Regensburg
Florian Pargent and myself will be giving an introductory machine learning workshop at the University of Regensburg.
Check out our open materials and data: https://osf.io/mnfbd/
Machine Learning Workshop at the University of Cologne
Florian Pargent and myself will be giving an introductory machine learning workshop at the University of Cologne.
Check out our open materials and data: https://osf.io/mnfbd/
16.09. - 20.09.2018
Prior to the DGPS2018 conference, Florian Pargent and I will provide "An Introduction to Machine Learning for Psychologists in R" in a preconference workshop. More infos will be provided via this OSF-repository.
I'll be chairing a prediction-focused symposium ( "Predictions in Psychology - Behavior, Personality, Emotions, Performance, Places and Person-Culture Fit") at the DGPS2018 in Frankfurt, Germany.
Prof. Dr. Markus Bühner and I will discuss "Psychological Diagnostics in the Era of Machine Learning" in the invited symposium "Big Data: The new Big Promise for research in applied psychology?", chaired by Cornelius König.
GESIS - CSS Seminar
Claudia Wagner has invited me to present my research about mobile sensing at the GESIS CSS seminar for computational social science in Cologne.
24.08. - 27.08.2018
Gabriella M. Harari and Samuel D. Gosling have invited me to participate in an initial workshop for the creation of an international mobile sensing consortium in Austin, TX, USA.
17.07. - 21.07.2018
Together with Sandrine Müller, I'll be chairing a symposium titled "Quantified Personality: Measuring individual differences in behavior with mobile sensing"at the ECP19 in Zadar, Croatia and present my latest work on the prediction of behavior from digital footprints.
Sandrine Müller and I be will co-chairing a symposium titled "Physical manifestations of psychological characteristics" at the APS - Convention in San Francisco. I will present my groups work on the prediction of individual personality traits from smartphone data with a focus on geo-location based features.
Invited Talk, Stanford University
Jon Krosnick and Gabriella Harari have invited me to give a talk about mobile sensing research at the communications department of Stanford University.