Weidemann, Christoph - Swansea University - College of Human and Health Sciences

个人简介

Cognitive processes, such as those involved in perception, memory and decision making, are highly context dependent. Previous experiences, expectations, and goals all shape how sensory input is transformed into percepts, how memories are stored and retrieved and how available information is evaluated to guide behavior. This feature of human information processing is fascinatingly pervasive and can be easily experienced, especially in cases when it leads to errors. For example, it is often difficult to identify a familiar face outside of its usual context ("the butcher on the bus" phenomenon) and the the erroneous repetition of written words often goes unnoticed ("repetition blindness"; an example is embedded in this very sentence). Despite leading to errors in some cases, the integration of context with current processing is integral to cognition because it constitutes the foundation for learning and adaptive behavior. My research investigates how context shapes human information processing. To this end I measure accuracy and speed of overt behavior as well as activity in the human brain as assessed with tools such as electroencephalography (EEG), magnetoencephalography (MEG) and direct recordings from electrodes that are implanted in the brains of neurosurgery patients. A particular emphasis of my work is on the development of precise theoretical accounts (mathematical models) of cognitive processes that are informed and constrained by measured overt behavior and brain activity.

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DelPozo-Baños, M. & Weidemann, C. (2017). Localized component filtering for electroencephalogram artifact rejection. Psychophysiology https://cronfa.swan.ac.uk/Record/cronfa31721 doi:10.1111/psyp.12810 Weidemann, C. & Kahana, M. (2016). Assessing recognition memory using confidence ratings and response times. Royal Society Open Science 3(4), 150670 https://cronfa.swan.ac.uk/Record/cronfa27448 doi:10.1098/rsos.150670 Weidacker, K., Weidemann, C., Boy, F. & Johnston, S. (2016). Cathodal tDCS improves task performance in participants high in Coldheartedness. Clinical Neurophysiology 127(9), 3102-3109. https://cronfa.swan.ac.uk/Record/cronfa29365 doi:10.1016/j.clinph.2016.05.274 DelPozo-Banos, M., Travieso, C., Weidemann, C. & Alonso, J. (2015). EEG biometric identification: a thorough exploration of the time-frequency domain. Journal of Neural Engineering 12(5), 056019 https://cronfa.swan.ac.uk/Record/cronfa24432 doi:doi:10.1088/1741-2560/12/5/056019 Ramayya, A., Zaghloul, K., Weidemann, C., Baltuch, G. & Kahana, M. (2014). Electrophysiological evidence for functionally distinct neuronal populations in the human substantia nigra. Frontiers in Human Neuroscience 8 https://cronfa.swan.ac.uk/Record/cronfa18581 doi:10.3389/fnhum.2014.00655 Burns, E., Tree, J. & Weidemann, C. (2014). Recognition memory in developmental prosopagnosia: electrophysiological evidence for abnormal routes to face recognition. Frontiers in Human Neuroscience 8 https://cronfa.swan.ac.uk/Record/cronfa18270 doi:10.3389/fnhum.2014.00622 Leighton, I. Hiemstra, J. & Weidemann, C. (2013). Recognition of micro-scale deformation structures in glacial sediments - pattern perception, observer bias and the influence of experience. Boreas 42(2), n/a-469. https://cronfa.swan.ac.uk/Record/cronfa7049 doi:10.1111/j.1502-3885.2011.00246.x Jacobs, J., Weidemann, C., Miller, J., Solway, A., Burke, J., Wei, X., Suthana, N., Sperling, M., Sharan, A., Fried, I. & Kahana, M. (2013). Direct recordings of grid-like neuronal activity in human spatial navigation. Nature Neuroscience 16(9), 1188-1190. https://cronfa.swan.ac.uk/Record/cronfa15670 doi:10.1038/nn.3466 Mueller, S. & Weidemann, C. (2012). Alphabetic letter identification: Effects of perceivability, similarity, and bias. Acta Psychologica 139(1), 19-37. https://cronfa.swan.ac.uk/Record/cronfa6934 doi:10.1016/j.actpsy.2011.09.014 Miller, J. Weidemann, C. & Kahana, M. (2012). Recall termination in free recall. Memory & Cognition 40(4), 540-550. https://cronfa.swan.ac.uk/Record/cronfa7908 doi:10.3758/s13421-011-0178-9 Zaghloul, K., Weidemann, C., Lega, B., Jaggi, J., Baltuch, G. & Kahana, M. (2012). Neuronal Activity in the Human Subthalamic Nucleus Encodes Decision Conflict during Action Selection. Journal of Neuroscience 32(7), 2453-2460. https://cronfa.swan.ac.uk/Record/cronfa8382 doi:10.1523/JNEUROSCI.5815-11.2012 Blagrove, M. Fouquet, N. Baird, A. Pace-Schott, E. Davies, A. Neuschaffer, J. Henley-Einion, J. Weidemann, C. Thome, J. McNamara, P. & Turnbull, O. (2012). Association of salivary-assessed oxytocin and cortisol levels with time of night and sleep stage. Journal of Neural Transmission https://cronfa.swan.ac.uk/Record/cronfa12701 doi:10.1007/s00702-012-0880-1