Postdoctoral Research Fellow
School of Life and Health Sciences
Birmingham B4 7ET
Rob graduated in 1997 with a BSc in Mathematics and Psychology from Keele University. He then completed an MSc in Machine Perception and Neural Computation, also at Keele, in 1998. He studied for a PhD under the supervision of Dr Mitch Thomson at Aston University and latterly at Derby University and completed his thesis, “Human sensitivity to higher-order statistical structure in natural images”, in 2005. He worked for with Tim Meese on a Wellcome Trust grant studying the perception of depth in human vision until September 2007 before working for Brian Roberts on a 3-year EPSRC project studying the perceptual organization of speech investigating contributions of general and speech-specific factors. After a further 2 years working for Tim Meese on an EPSRC grant on spatial vision he is now working again for Brian Roberts on a 3-year ESRC project investigating the pecerceptual organization of speech.
- Speech perception, with particular emphasis on how speech is understood in the presence of competing speech (with Prof Brian Roberts).
- The integration of perceptual information, e.g. the combination of visual signals across space (with Prof. Tim Meese).
- Psychophysical methods.
- Computational analysis of retinal vascular images (with Dr Rebekka Heitmar).
- Liberator – software for rapid (2AFC) experiment development using Cambridge Research Systems VSG and ViSaGe hardware.
(Google Scholar profile)
Roberts, B., Summers, R.J., and Bailey, P.J. (2014). “Formant-frequency variation and informational masking of speech by extraneous formants: Evidence against dynamic and speech-specific acoustical constraints,”Journal of Experimental Psychology: Human Perception & Performance. Online First Publication, 19th May, 2014.
Roberts, B., Summers, R.J. & Bailey, P.J., (2013) Formant-Frequency Variation and Its Effects on Across-Formant Grouping in Speech Perception, Basic Aspects of Hearing, 323-331
Meese, T.S. & Summers, R.J. (2012) Theory and data for area summation of contrast with and without uncertainty: Evidence for a noisy energy model. Journal of Vision 12 (11)
Heitmar, R. Summers, R.J. (2012) Assessing vascular function using dynamic retinal diameter measurements: A new insight on the endothelium, Thrombosis and Haemostasis, 107.
Summers, R.J. Bailey, P.J. Roberts, B. (2012) Effects of the Rate of Formant-Frequency Variation on the Grouping of Formants in Speech Perception, Journal of the Association for Research in Otolaryngology, 13(2), 269-280.
Roberts, B., Summers, R.J., & Bailey, P.J. (2011). The intelligibility of noise-vocoded speech: Spectral information available from across-channel comparison of amplitude envelopes. Proceedings of the Royal Society B
, 278: 1595-1600. doi: 10.1098/rspb.2010.1554.
Summers, R.J., Roberts, B., & Bailey, P.J. (2010). Effects of differences in fundamental frequency on across-formant grouping in speech perception. Journal of the Acoustical Society of America, 128,
Roberts, B., Summers, R.J., & Bailey, P.J. (2010). The perceptual organization of sine-wave speech under competitive conditions. Journal of the Acoustical Society of America, 128(2), 804-817.
Meese, T. S., Challinor, K. L., Summers, R. J., & Baker, D. H. (2009). Suppression pathways saturate with contrast for parallel surrounds but not for superimposed cross-oriented masks. Vision Research, 49(24), 2927-2935
Summers, R. J., & Meese, T. S. (2009) The influence of fixation points on contrast detection and discrimination of patches of
grating: Masking and facilitation. Vision Research
, 49(14), 1894-1900, doi:10.1016/j.visres.2009.04.027
Meese, T. S., & Summers, R. J. (2009). Neuronal convergence in early contrast vision: Binocular summation is followed by response nonlinearity and area summation. Journal of Vision
(4):7, 1-16, http://journalofvision.org/9/4/7/
Meese, T.S., Challinor, K.L. & Summers, R. J. (2008) A common contrast pooling rule for suppression within and between the eyes. Visual Neuroscience
, 25, 585–601.
Recent Conference Abstracts
Stachurski, M., Summers, R. J., Roberts, B., (2014) Stream segregation of concurrent speech and the verbal transformation effect: Influence of fundamental frequency and lateralization cues, The Journal of the Acoustical Society of America 135(4) 2224-2224, 167th Meeting of the Acoustical Society of America, Rhode Island, PI.
Roberts, B., Summers, R. J., Bailey, P. J., (2014) Acoustic surface structure, across-formant integration, and speech intelligibility, The Journal of the Acoustical Society of America 135(4), 2346-2347, 167th Meeting of the Acoustical Society of America, Rhode Island, PI.
Meese, T S, Baker, D H, Summers, R J, Georgeson, M A, (2012) Contrast integration and counter suppression: a general scheme for visual hierarchies? Journal of Vision 12(14) 33-33, Association for Research in Vision and Ophthalmology.
Summers, R.J., Baker, D.H. & Meese, T.S. (2012). Spatial integration within and between first- and second-order stimuli. Perception, 41(S): 223.