Research

My research is on psychometrics and statistical modelling of survey data: response formats, response styles and data from experience sampling studies. Publications are also listed on ORCID. Data and code for most papers are on OSF, software is on GitHub. See Projects for short summaries.

Journal articles (peer-reviewed)

  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2026). Slider versus Likert scales: Psychometric properties in ambulatory assessment. Behavior Research Methods, 58(4), 97. doi.org/10.3758/s13428-026-02992-4
  • Ottenstein, C., Ecker, S., Vollbracht, D., & Lischetzke, T. (2026). Multiverse of data sets regarding indirect measures of emotional clarity: An examination of the degrees of freedom in analyzing response times to emotion items. Collabra: Psychology, 12(1), 162291. doi.org/10.1525/collabra.162291
  • Ecker, S., Ottenstein, C., Vollbracht, D., & Lischetzke, T. (2026). Does the procedure matter? Applying a multiverse analysis approach to negative emotion differentiation. Collabra: Psychology, 12(1), 159939. doi.org/10.1525/collabra.159939
  • Knorr, A., Wegmann, E., Vollbracht, D., Brand, M., & Antons, S. (2026). Predicting moments of impaired control over addictive behaviors: Relevance of craving and inhibitory control measured in laboratory and ambulatory settings. Journal of Behavioral Addictions. doi.org/10.1556/2006.2025.00102
  • Schmid, A. M., Thomas, T. A., Oelker, A., Vollbracht, D., Meurer, N., Mallon, L., Diers, M., Dominick, N., Kampa, M., Wolf, O. T., Brand, M., Müller, A., & Steins-Loeber, S. (2026). Daily stress and gaming – an ambulatory assessment study in individuals with pathological, risky, and non-problematic gaming behavior. Acta Psychologica, 263, 106321. doi.org/10.1016/j.actpsy.2026.106321
  • Thomas, T. A., Schmid, A. M., Vollbracht, D., Oelker, A., Wolf, O. T., Brand, M., Steins-Loeber, S., & Müller, A. (2026). Pavlovian-to-instrumental transfer effect after devaluation as indicator of habitual behavior together with stress responsivity predicts daily use of buying-shopping platforms. Acta Psychologica, 264, 106453. doi.org/10.1016/j.actpsy.2026.106453

Preprints (under review)

  • Vollbracht, D., Müller, M., Lischetzke, T., & Henninger, M. (2026). Extreme response style generalizes across Likert-type and visual analogue scales. PsyArXiv. doi.org/10.31234/osf.io/zevb7_v1
  • Vollbracht, D., Lischetzke, T., & Henninger, M. (2026). Detecting response styles in visual analogue scales. PsyArXiv. doi.org/10.31234/osf.io/xteku_v2
  • Ulitzsch, E., Vollbracht, D., Zhang, L., Jover Martínez, A., Domingue, B., Haslbeck, J. M. B., Lischetzke, T., & Vogelsmeier, L. V. D. E. (2026). Likert versus visual analogue scales in ecological momentary assessment: Initial evidence that Likert scales come with reduced capacity to sustain attentiveness. PsyArXiv. doi.org/10.31234/osf.io/p8fg6_v1

Software

Conference contributions

  • Vollbracht, D., Lischetzke, T., & Henninger, M. (2025, November). Detecting response styles in slider scales [Talk]. SMiP Retreat Fall 2025, Ludwigshafen, Germany.
  • Vollbracht, D., Lischetzke, T., & Henninger, M. (2025, September). Detecting response styles in slider scales [Talk]. Tagung der DGPs-Fachgruppe Methoden und Evaluation 2025, Berlin, Germany.
  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2025, May). Slider vs. Likert scales: Psychometric properties in ambulatory assessment [Talk]. Society for Ambulatory Assessment Conference 2025, Leuven, Belgium.
  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2024, September). Slider scales vs. radio buttons: A comparison of psychometric properties in experience sampling methods [Talk]. 53. DGPs-Kongress / 15. ÖGP-Tagung, Vienna, Austria.
  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2024, March). Slider scales vs. radio buttons: A comparison of psychometric properties in experience sampling methods [Talk]. Multilevel Conference 2024 (Young Researcher Award), Utrecht, The Netherlands.
  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2023, June). Slider scales or radio buttons? Comparing the psychometric properties of slider scales with traditional radio button scales in ambulatory assessment [Poster]. Society for Ambulatory Assessment Conference 2023, Amsterdam, The Netherlands.
  • Vollbracht, D., Ottenstein, C., Ecker, S., & Lischetzke, T. (2023, June). Slider scales or radio buttons? Comparing the psychometric properties of slider scales with traditional radio button scales in ambulatory assessment [Poster]. SMiP Summer School 2023, Mannheim, Germany.

Awards

  • Five teaching awards, Department of Psychology, RPTU, based on the course evaluation (2022 – 2025)
  • Young Researcher Award, Multilevel Conference, Utrecht (2024)
  • Two Open Science Awards in Gold, Department of Psychology, RPTU, for preregistration, open data and reproducible analyses (2023, 2025)

Peer review

Ad hoc reviewer for Collabra: Psychology