Professor Roger Carpenter
Professor Roger Carpenter is pleased to consider applications from prospective PhD students.
http://www.pdn.cam.ac.uk/staff/c... (personal home page)
I work on the brain mechanisms of human decision. The most common decision we make - two or three times every second - is what to look at next, and the measurement of the time taken to choose to look at a visual target - the saccadic latency - has turned out to be a highly informative way of studying the underlying neural decision mechanisms. This work has given rise to a model, LATER (Linear Approach to Threshold with Ergodic Rate), that is essentially Bayesian but with an added random component whose function appears to be to make our actions unpredictable (useful in predator-prey situations) and also to make our exploratory and creative behaviours more effective.
Modern technological advances mean that we can measure saccades rapidly and non-invasively, using portable micro-miniature devices, in the clinic or at the bedside, and this has led to an ever-increasing range of clinical applications, from PD and HD, through cerebrovascular impairment to metabolic and liver disorders.
Iain Gilchrist Web: http://psychology.psy.bris.ac.uk/people/...
Andrew Anderson Web: http://www.optometry.unimelb.edu.au/
Yasin Temel Web: http://www.azm.nl/profess...
Carpenter RH, Reddi BA, Anderson AJ (2009), “A simple two-stage model predicts response time distributions.” J Physiol 587(Pt 16):4051-62 Details
Temel Y, Visser-Vandewalle V, Carpenter RH (2008), “Saccadic latency during electrical stimulation of the human subthalamic nucleus.” Curr Biol 18(10):R412-4 Details
Carpenter RH, Williams ML (1995), “Neural computation of log likelihood in control of saccadic eye movements.” Nature 377(6544):59-62 Details
Story GW, Carpenter RH (2009), “Dual LATER-unit model predicts saccadic reaction time distributions in gap, step and appearance tasks.” Exp Brain Res 193(2):287-96 Details
Temel Y, Visser-Vandewalle V, Carpenter RH (2009), “Saccadometry: a novel clinical tool for quantification of the motor effects of subthalamic nucleus stimulation in Parkinson's disease.” Exp Neurol 216(2):481-9 Details
Anderson AJ, Carpenter RH (2008), “The effect of stimuli that isolate S-cones on early saccades and the gap effect.” Proc Biol Sci 275(1632):335-44 Details
Anderson AJ, Yadav H, Carpenter RH (2008), “Directional prediction by the saccadic system.” Curr Biol 18(8):614-8 Details
Roos JC, Calandrini DM, Carpenter RH (2008), “A single mechanism for the timing of spontaneous and evoked saccades.” Exp Brain Res Details
Carpenter RH, McDonald SA (2007), “LATER predicts saccade latency distributions in reading.” Exp Brain Res 177(2):176-83 Details
Oswal A, Ogden M, Carpenter RH (2007), “The time course of stimulus expectation in a saccadic decision task.” J Neurophysiol 97(4):2722-30 Details
Pearson BC, Armitage KR, Horner CW, Carpenter RH (2007), “Saccadometry: the possible application of latency distribution measurement for monitoring concussion.” Br J Sports Med 41(9):610-2 Details
Ali FR, Michell AW, Barker RA, Carpenter RHS (2006), “The use of quantitative oculometry in the assessment of Huntington's disease” Experimental Brain Research 169:237-45
Anderson AJ, Carpenter RHS (2006), “Changes in expectation consequent on experience, modelled by a simple, forgetful neural circuit” Journal of Vision 6:822-835
Michell AW, Xu Z, Fritz D, Lewis SJ, Foltynie T, Williams-Gray CH, Robbins TW, Carpenter RH, Barker RA (2006), “Saccadic latency distributions in Parkinson's disease and the effects of L-dopa.” Exp Brain Res 174(1):7-18 Details
Sinha N, Brown JT, Carpenter RH (2006), “Task switching as a two-stage decision process.” J Neurophysiol 95(5):3146-53 Details
Taylor MJ, Carpenter RH, Anderson AJ (2006), “A noisy transform predicts saccadic and manual reaction times to changes in contrast.” J Physiol 573(Pt 3):741-51 Details
Nouraei SA, De Pennington N, Jones JG, Carpenter RH (2003), “Dose-related effect of sevoflurane sedation on higher control of eye movements and decision making.” Br J Anaesth 91(2):175-83 Details
Reddi BA, Asrress KN, Carpenter RH (2003), “Accuracy, information, and response time in a saccadic decision task.” J Neurophysiol 90(5):3538-46 Details
Reddi BAJ, Asrress KN, Carpenter RHS (2003), “Accuracy, information and response time in a saccadic decision task” Journal of Neurophysiology 90:3538-46
Carpenter RH (2001), “Express saccades: is bimodality a result of the order of stimulus presentation?” Vision Res 41(9):1145-51 Details
Leach JC, Carpenter RH (2001), “Saccadic choice with asynchronous targets: evidence for independent randomisation.” Vision Res 41(25-26):3437-45 Details
Reddi BA, Carpenter RH (2000), “The influence of urgency on decision time.” Nat Neurosci 3(8):827-30 Details
Hanes DP, Carpenter RH (1999), “Countermanding saccades in humans.” Vision Res 39(16):2777-91 Details
Kinsler V, Carpenter RH (1995), “Saccadic eye movements while reading music.” Vision Res 35(10):1447-58 Details