Daniel Bratzke

Bild von Herrn Doktor Daniel Bratzke

Dr. rer. nat. Daniel Bratzke

Cognium Building, Room 1140
Hochschulring 18
28359 Bremen
Email: daniel.bratzke (at) uni-bremen.de
Phone: +49 (0)421 218-68706


Research Focus

  • Attention and awareness
    • Processing restrictions for double tasks
    • Introspection during multitasking (double tasks, changing tasks etc.)
  • Perception
    • Time perception
    • Mental representation of temporal information

Scientific Career

Since 03/2020         Lecturer for general psychology, University of Bremen

06/2010 - 02/2020  Postdoc, cognition and perception, Department of Psychology, University of Tübingen

05/2000                   Dr. rer. nat, University of Tübingen

11/2005 - 05/2010   PhD student, general and biological psychology, Psychological Institute, University of Tübingen

2005                        Diploma (Psychology), University of Tübingen



  • Bratzke, D., Peris, L., & Ulrich, R. (2023). Time and visual-spatial illusions: Evidence for cross-dimensional interference between duration and illusory size. Attention, Perception & Psychophysics. https://doi.org/10.3758/s13414-023-02737-x
  • Bratzke, D., & Hansen, A. (2023). How does it feel? Passage of time judgments in speeded RT performance. Psychological Research. https://doi.org/10.1007/s00426-023-01854-4


  • Bratzke, D., Bryce, D. (2022). Subjective estimates of total processing time in dual-tasking: (some) good news for bad introspection. Psychological Research. https://doi.org/10.1007/s00426-022-01762-z
  • Bratzke, D., & Bryce, D. (2022). Timing of internal processes: Investigating introspection about the costs of task switching and memory search. Attention, Perception & Psychophysics,  84,1501–150. https://doi.org/10.3758/s13414-022-02510-6


  • Bryce, D. & Bratzke, D. (2021). The surprising role of stimulus modality in the dual-task introspective blind spot: a memory account. Psychological Research. https://doi.org/10.1007/s00426-021-01545-y
  • Bratzke, D. & Ulrich, R. (2021). Mental imagery of free fall: Does a falling apple accelerate in our minds? Timing & Time Perception. doi: 10.1163/22134468-bja10022


  • Koob, V., Durst, M., Bratzke, D., Ulrich, R., & Janczyk, M. (2020). S1-R2 and R1-R2 Backward Crosstalk both affect the central processing stage. Journal of Cognition, 3(1), 1-12.
  • Bratzke, D. & Ulrich, R. (2020). Short-term memory of temporal information revisited. Psychological Research. Advance online publication. doi:10.1007/s00426-020-01343-y
  • Bratzke, D. & Janczyk, M. (2020). Introspection about backward crosstalk in dual-task performance. Psychological Research. Advance online publication. doi: 10.1007/s00426-019-01282-3.


  • Bratzke, D. & Ulrich, R. (2019). Temporal sequence discrimination within and across senses: Do we really hear what we see? Experimantal Brain Research, 237, 3089-3098. doi: 10.1007/s00221-019-05654-4.
  • Bratzke, D. & Ulrich, R. (2019). Temporal reproduction within and across senses: Testing the supramodal property of the Pacemaker-Counter model. Journal of Experimental Psychology: Human Perception and Performance, 45, 1218-1235. doi: 10.1037/xhp0000667.
  • Bratzke, D. & Bryce, D. (2019). Introspection is not always blind to the costs of multitasking: The case of task switching. Journal of Experimental Psychology: Learning, Memory,& Cognition, 45, 890-992. doi: 10.1037/xlm0000635.


  • Bratzke, D. , Birngruber, T., Durst, M., & Schröter, H. (2017). Filled and empty motor reproduction of filled and empty intervals: Is there also a filled-reproduction illusion? Attention, Perception, & Psychophysics, 79, 2143-2152.
  • Bryce, D. & Bratzke, D. (2017). Are participants’ reports of their own reaction times reliable? Re-examining introspective limitations in active and passive dual-task paradigms. Acta Psychologica, 172, 1-9.


  • Bausenhart, K. M., Bratzke, D. , & Ulrich, R. (2016). Formation and representation of temporal reference information. Current Opinion in Behavioral Sciences, 8, 46-52.
  • Bratzke, D. & Bryce, D. (2016). Temporal discrimination of one’s own reaction times in dual-task performance: Context effects and methodological constraints. Attention, Perception, & Psychophysics, 78, 1806-1816.
  • Bratzke, D. ,Quinn, K. R., Ulrich, R., & Bausenhart, K. (2016). Representations of temporal information in short-term memory: Are they modality-specific? Acta Psychologica, 170, 163-167.
  • Bryce, D. & Bratzke, D. (2016). Multiple timing of nested intervals: Further evidence for a weighted sum of segments account. Psychonomic Bulletin & Review, 23, 317-323.


  • Bryce, D. & Bratzke, D. (2015). Are introspective reaction times affected by the method of time estimation? A comparison of visual analogue scales and reproduction. Attention, Perception & Psychophysics, 77, 978-984.
  • Bryce, D. & Bratzke, D. (2015). How are overlapping intervals perceived? Evidence for a weighted sum of segments model. Acta Psychologica, 156, 83-95.
  • Schröter, H., Bratzke, D. , Fiedler, A., & Birngruber, T. (2015). Does semantic redundancy gain result from multiple semantic priming? Acta Psychologica, 161, 79-85.


  • Bratzke, D. , Bryce, D., & Seifried-Dübon, T. (2014). Distorted subjective reports of stimulus onsets under dual-task conditions: Delayed conscious perception or estimation bias? Consciousness and Cognition, 30, 36-47.
  • Bratzke, D. , Schröter, H., & Ulrich, R. (2014). The role of consolidation for perceptual learning in temporal discrimination within and across modalities. Acta Psychologica, 147, 75-79.
  • Bryce, D. & Bratzke, D. (2014). Introspective reports of reaction times in dual-tasks reflect experienced difficulty rather than timing of cognitive processes. Consciousness and Cognition, 27, 254-267.


  • Bratzke, D. , Seifried, T., & Ulrich, R. (2012). Perceptual learning in temporal discrimination: Asymmetric cross-modal transfer from audition to vision. Experimental Brain Research, 221, 205-210.
  • Bratzke, D. , Steinborn, M. B., Rolke, B., & Ulrich, R. (2012b). Reply to: Testing of ’Executive Function’. Chronobiology International, 29, 1285.
  • Bratzke, D. , Steinborn, M. B., Rolke, B., & Ulrich, R. (2012a). Effects of sleep loss and circadian rhythm on executive inhibitory control in the Stroop and Simon tasks. Chronobiology International, 29, 55-61.
  • Leonhard, T., Bratzke, D. , Schröter, H., & Ulrich, R. (2012). Time-course analysis of temporal preparation on central processes. Psychological Research, 76, 236-251.
  • Steinborn, M. B., Flehmig, H. C., Bratzke, D. , & Schröter, H. (2012). Error reactivity in self-paced performance. Highly-accurate individuals exhibit largest post-error slowing. Quarterly Journal of Experimental Psychology, 65, 624-631.


  • Claros-Salinas, D., Bratzke, D. , & Schröter, H. (2010). Subjective and objective assessment of fatigue. Journal of the Neurological Sciences, 298, 165-166.
  • Claros-Salinas, D., Bratzke, D. , Greitemann, G., Nickisch, N., Ochs, L., & Schröter, H. (2010). Fatigue-related diurnal variations of cognitive performance in multiple sclerosis and stroke patients. Journal of the Neurological Sciences, 295, 75-81.
  • Steinborn, M. B., Bratzke, D. , Rolke, B., Gordijn, M. C. M., Beersma, D. G. M., & Ulrich, R. (2010). The effect of 40 hours of constant wakefulness on number comparison performance. Chronobiology International, 27, 807-825
  • Steinborn, M. B., Rolke, B., Bratzke, D. , & Ulrich, R. (2010). The effect of a cross-trial shift of auditory warning signals on the sequential foreperiod effect. Acta Psychologica, 134, 94-104.


  • Bratzke, D. , Rolke, B., & Ulrich, R. (2009). The source of execution-related dual-task interference: Motor bottleneck or response monitoring? Journal of Experimental Psychology: Human Perception and Performance, 35, 1413-1426.
  • Bratzke, D. , Rolke, B., Steinborn, M. B., & Ulrich, R. (2009). The effect of 40 hours constant wakefulness on task-switching efficiency. Journal of Sleep Research, 18, 167-172.
  • Steinborn, M. B., Rolke, B., Bratzke, D. , & Ulrich, R. (2009). Dynamic adjustment of temporal preparation: Shifting warning signal modality attenuates the sequential foreperiod effect. Acta Psychologica, 132, 40-47.


  • Bratzke, D. , Ulrich, R., Rolke, B., Schröter, H., Jentzsch, I., & Leuthold, H. (2008). Motor limitation in dual-task processing with different effectors. Quarterly Journal of Experimental Psychology, 61, 1385-1399.
  • Steinborn, M. B., Rolke, B., Bratzke, D. , & Ulrich, R. (2008). Sequential effects within a short foreperiod context: Evidence for the conditioning account of temporal preparation. Acta Psychologica, 129, 297-307.


  • Bratzke, D. , Rolke, B., Ulrich, R., & Peters, M. (2007). Central slowing during the night. Psychological Science, 18, 456-461.