Shane Ehrhardt

PhD Student

Supervisors

Prof. Paul Dux (primary)

Dr. Hannah Filmer

Current research

Applying small electrical fields (low current and voltage) to the scalp can modulate and interact with neurophysiological processes that underly various aspects of behaviour and cognition. Our research focuses on optimizing the parameter space of such techniques to maximise their effect, as well as to identify and measure inter-individual differences that give rise to variation in the response to electrical stimulation in cognitive training paradigms. We do so by using quantitative techniques such as magnetic resonance spectroscopy and computational decision-making models.

Research interests

Transcranial direct current stimulation
Cognitive training
Individual differences

Publications

Filmer, H. L., Ehrhardt, S. E., Bollmann, S., Mattingley, J. B., & Dux, P. E. (2019). Accounting for individual differences in the response to tDCS with baseline levels of neurochemical excitability. Cortex, 115, 324–334. https://doi.org/10.1016/j.cortex.2019.02.012

Filmer, H. L., Ehrhardt, S. E., Shaw, T. B., Mattingley, J. B., & Dux, P. E. (2019). The efficacy of transcranial direct current stimulation to prefrontal areas is related to underlying cortical morphology. NeuroImage, 196(April), 41–48. https://doi.org/10.1016/j.neuroimage.2019.04.026

Filmer, H. L., Ballard, T., Ehrhardt, S. E., Bollmann, S., Shaw, T. B., Mattingley, J. B., & Dux, P. E. (2020). Dissociable effects of tDCS polarity on latent decision processes are associated with individual differences in neurochemical concentrations and cortical morphology. Neuropsychologia, 141(September 2019), 107433. https://doi.org/10.1016/j.neuropsychologia.2020.107433

Ehrhardt, S. E., Filmer, H. L., Wards, Y., Mattingley, J. B., & Dux, P. E. (2021). The influence of tDCS intensity on decision-making training and transfer outcomes. Journal of Neurophysiology, 125(2), 385–397. https://doi.org/10.1152/jn.00423.2020