Steven Dakin

Summary

Affiliation: University College London
Country: UK

Publications

  1. pmc Sensitivity to numerosity is not a unique visuospatial psychophysical predictor of mathematical ability
    Marc S Tibber
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    Vision Res 89:1-9. 2013
  2. pmc The development of an automated sentence generator for the assessment of reading speed
    Michael D Crossland
    UCL Institute of Ophthalmology, London, UK
    Behav Brain Funct 4:14. 2008
  3. doi request reprint Anisotropies in judging the direction of moving natural scenes
    Steven C Dakin
    Institute of Ophthalmology, University College London, London, UK
    J Vis 10:5. 2010
  4. ncbi request reprint Local and global limitations on direction integration assessed using equivalent noise analysis
    Steven C Dakin
    Department of Visual Science, Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Vision Res 45:3027-49. 2005
  5. ncbi request reprint Vagaries of visual perception in autism
    Steven Dakin
    Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, United Kingdom
    Neuron 48:497-507. 2005
  6. ncbi request reprint An oblique effect for local motion: psychophysics and natural movie statistics
    Steven C Dakin
    Institute of Ophthalmology, University College London, Bath Street, London, United Kingdom
    J Vis 5:878-87. 2005
  7. doi request reprint Biological "bar codes" in human faces
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    J Vis 9:2.1-10. 2009
  8. doi request reprint Context influences contour integration
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, London, UK
    J Vis 9:13.1-13. 2009
  9. pmc Psychophysical evidence for a non-linear representation of facial identity
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, EC1V 9EL London, UK
    Vision Res 49:2285-96. 2009
  10. doi request reprint Vision: thinking globally, acting locally
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    Curr Biol 19:R851-4. 2009

Detail Information

Publications45

  1. pmc Sensitivity to numerosity is not a unique visuospatial psychophysical predictor of mathematical ability
    Marc S Tibber
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    Vision Res 89:1-9. 2013
    ..Instead, the data are consistent with mathematics representing a multi-factorial process that shares resources with a number of visuospatial tasks...
  2. pmc The development of an automated sentence generator for the assessment of reading speed
    Michael D Crossland
    UCL Institute of Ophthalmology, London, UK
    Behav Brain Funct 4:14. 2008
    ..The automated sentence generator would be useful for measuring reading speed with button-press response (such as within MRI scanners) and for studies requiring many repeated measures of reading speed...
  3. doi request reprint Anisotropies in judging the direction of moving natural scenes
    Steven C Dakin
    Institute of Ophthalmology, University College London, London, UK
    J Vis 10:5. 2010
    ..g., around cardinal directions). This bias change can improve direction discrimination but is not due to a reduction in variability...
  4. ncbi request reprint Local and global limitations on direction integration assessed using equivalent noise analysis
    Steven C Dakin
    Department of Visual Science, Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Vision Res 45:3027-49. 2005
    ..A population vector-averaging scheme (essentially a special case of ML estimation) produces similar predictions but out-performs subjects at high levels of directional variability and fails to predict motion coherence thresholds...
  5. ncbi request reprint Vagaries of visual perception in autism
    Steven Dakin
    Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, United Kingdom
    Neuron 48:497-507. 2005
    ..Such an explanation may also provide a link between perceptual abnormalities and specific deficits in social cognition associated with autism...
  6. ncbi request reprint An oblique effect for local motion: psychophysics and natural movie statistics
    Steven C Dakin
    Institute of Ophthalmology, University College London, Bath Street, London, United Kingdom
    J Vis 5:878-87. 2005
    ..If motion detectors are optimized to deal with our visual world then such anisotropies likely explain the local nature of the OEM...
  7. doi request reprint Biological "bar codes" in human faces
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    J Vis 9:2.1-10. 2009
    ....
  8. doi request reprint Context influences contour integration
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, London, UK
    J Vis 9:13.1-13. 2009
    ..Specifically we show that our results are consistent with contour integration relying on an opponent-orientation energy response from a bank of first-stage oriented filters...
  9. pmc Psychophysical evidence for a non-linear representation of facial identity
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, EC1V 9EL London, UK
    Vision Res 49:2285-96. 2009
    ....
  10. doi request reprint Vision: thinking globally, acting locally
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
    Curr Biol 19:R851-4. 2009
    ..The global structure of images profoundly influences how we see their local detail, consistent with activity in primary visual cortex being disambiguated via feedback from later visual areas...
  11. pmc Dissociable effects of attention and crowding on orientation averaging
    Steven C Dakin
    UCL Institute of Ophthalmology, University College London, London, UK
    J Vis 9:28.1-16. 2009
    ....
  12. doi request reprint Probabilistic, positional averaging predicts object-level crowding effects with letter-like stimuli
    Steven C Dakin
    Institute of Ophthalmology, University College London, London, UK
    J Vis 10:14. 2010
    ..Thus, we demonstrate a set of seemingly "high-level" object-centered crowding effects that can arise from "low-level" interactions between the features of letter-like elements...
  13. pmc Natural image statistics mediate brightness 'filling in'
    Steven C Dakin
    Department of Visual Science, Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Proc Biol Sci 270:2341-8. 2003
    ..As predicted by the model, the filling-in process is contingent on the presence of appropriate low SF structure...
  14. ncbi request reprint Sensitivity to contrast modulation depends on carrier spatial frequency and orientation
    S C Dakin
    McGill Vision Research, Department of Ophthalmology, Montreal, Que, Canada
    Vision Res 40:311-29. 2000
    ..A final experiment measured envelope detection in the presence of noise masks. Results indicate that orientationally and spatially-band pass filtering precedes the detection of second-order structure...
  15. ncbi request reprint Information limit on the spatial integration of local orientation signals
    S C Dakin
    Institute of Ophthalmology, University College London, UK
    J Opt Soc Am A Opt Image Sci Vis 18:1016-26. 2001
    ..Orientation pooling is entirely flexible with respect to the position of input features...
  16. ncbi request reprint The role of relative motion computation in 'direction repulsion'
    S C Dakin
    Department of Visual Science, Institute of Ophthalmology, 11 43 Bath Street, London, UK
    Vision Res 40:833-41. 2000
    ..The effects of speed cannot be reconciled with the scheme as it stands, but this could be due to the model's failure to consider the effect of temporal frequency on the effective contrast of the sets...
  17. ncbi request reprint Local and global visual grouping: tuning for spatial frequency and contrast
    S C Dakin
    Institute of Ophthalmology, University College London, London, United Kingdom
    J Vis 1:99-111. 2001
    ..We conclude that local grouping is consistent with the use of simple-oriented filtering mechanisms. Global grouping seems to depend more on the visibility of elements that can be affected by both spatial frequency and contrast...
  18. ncbi request reprint Role of synchrony in contour binding: some transient doubts sustained
    Steven C Dakin
    Institute of Ophthalmology, University College London, UK
    J Opt Soc Am A Opt Image Sci Vis 19:678-86. 2002
    ....
  19. ncbi request reprint The interaction of first- and second-order cues to orientation
    S C Dakin
    McGill Vision Research, Department of Ophthalmology, Montreal, Quebec, Canada
    Vision Res 39:2867-84. 1999
    ..We propose that illusory tilting of the envelope is due to selective connectivity between first- and second-stage filters whose purpose is to dissociate the type of image structure producing each class of cue...
  20. ncbi request reprint Contour integration and scale combination processes in visual edge detection
    S C Dakin
    McGill Vision Research, Department of Ophthalmology, Montreal, Quebec, Canada
    Spat Vis 12:309-27. 1999
    ..Moreover, unlike contours composed of Gabors, the bandwidth of local elements is important for edge integration; the coding of element bandwidth seems to be dependent on the phase alignment of features across spatial frequency...
  21. ncbi request reprint Summation of concentric orientation structure: seeing the Glass or the window?
    S C Dakin
    Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Vision Res 42:2013-20. 2002
    ..We conclude that this paradigm presently offers no concrete psychophysical evidence for specialised concentric orientation detectors...
  22. pmc A common visual metric for approximate number and density
    Steven C Dakin
    Institute of Ophthalmology, University College London, London EC1V 9EL, United Kingdom
    Proc Natl Acad Sci U S A 108:19552-7. 2011
    ..This model is a simple, biologically plausible common metric for perceptual number and density...
  23. doi request reprint Deficits in local and global motion perception arising from abnormal eye movements
    Magella M Neveu
    Department of Visual Neuroscience, Institute of Ophthalmology, UCL, London, UK
    J Vis 9:9.1-15. 2009
    ....
  24. doi request reprint Visually-based temporal distortion in dyslexia
    Alan Johnston
    Department of Psychology, University College London, Gower Street, London WC1E 6BT, UK
    Vision Res 48:1852-8. 2008
    ....
  25. pmc The aperture problem in contoured stimuli
    David Kane
    UCL Institute of Ophthalmology, University College London, London EC1V 9EL, United Kingdom
    J Vis 9:13.1-17. 2009
    ..We report that global motion integration is (a) largely insensitive to the second-order statistics of such stimuli and (b) is rigidly broadband even in the presence of a disrupted low SF component...
  26. pmc Positional averaging explains crowding with letter-like stimuli
    John A Greenwood
    UCL Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, United Kingdom
    Proc Natl Acad Sci U S A 106:13130-5. 2009
    ..Together, our results suggest that crowding is a preattentive process that uses averaging to regularize the noisy representation of position in the periphery...
  27. pmc Dynamic properties of orientation discrimination assessed by using classification images
    Isabelle Mareschal
    Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, United Kingdom
    Proc Natl Acad Sci U S A 103:5131-6. 2006
    ....
  28. pmc Crowding changes appearance
    John A Greenwood
    UCL Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V9EL, UK
    Curr Biol 20:496-501. 2010
    ..These results confirm predictions from change-based models of crowding, such as averaging, and establish crowding as a regularization process that simplifies the peripheral field by promoting consistent appearance among adjacent objects...
  29. ncbi request reprint The shape and size of crowding for moving targets
    Peter J Bex
    Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Vision Res 43:2895-904. 2003
    ..These results reveal asymmetrical space-time dependent regions of visual integration that are radially organised about central vision...
  30. doi request reprint Monocular signals in human lateral geniculate nucleus reflect the Craik-Cornsweet-O'Brien effect
    Elaine J Anderson
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, London, UK
    J Vis 9:14.1-18. 2009
    ..Our observations suggest that the CCOB effect arises from signals in populations of monocular neurons very early in the human geniculostriate visual pathway...
  31. ncbi request reprint Critical band masking in optic flow
    Peter J Bex
    Division of Visual Rehabilitation Research, The Institute of Ophthalmology, London, UK
    Network 16:261-84. 2005
    ..Our results suggest that visual processing normalises responses to supra-threshold structure at different spatial and temporal frequencies within natural stimuli and so equates their effective visibility...
  32. ncbi request reprint Spatial interference among moving targets
    Peter J Bex
    Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
    Vision Res 45:1385-98. 2005
    ..The underlying connectivity of this integration favours low spatial frequency structure but is broadly tuned for speed...
  33. ncbi request reprint Grouping local directional signals into moving contours
    Peter J Bex
    Institute of Ophthalmology, 11 43 Bath Street, EC1V 9EL, London, UK
    Vision Res 43:2141-53. 2003
    ..The visibility of these moving contours identifies narrow-band grouping processes that are sensitive to the shape defined by the directions of the elements forming the contour...
  34. pmc Illusory stimuli can be used to identify retinal blind spots
    Michael D Crossland
    University College London Institute of Ophthalmology, London, United Kingdom
    PLoS ONE 2:e1060. 2007
    ....
  35. ncbi request reprint Comparison of the spatial-frequency selectivity of local and global motion detectors
    Peter J Bex
    Institute of Ophthalmology, London, UK
    J Opt Soc Am A Opt Image Sci Vis 19:670-7. 2002
    ..e., they integrate across a broad range of spatial frequencies), with a preference for low spatial frequencies...
  36. ncbi request reprint Theories of developmental dyslexia: insights from a multiple case study of dyslexic adults
    Franck Ramus
    Institute of Cognitive Neuroscience, University College London, London, UK
    Brain 126:841-65. 2003
    ..Overall, the present data support the phonological theory of dyslexia, while acknowledging the presence of additional sensory and motor disorders in certain individuals...
  37. ncbi request reprint Motion detection and the coincidence of structure at high and low spatial frequencies
    Peter J Bex
    Institute of Ophthalmology, 11 43 Bath Street, EC1V 9EL, London, UK
    Vision Res 43:371-83. 2003
    ..Both are required to account for the two results, and they appear to operate under very similar conditions...
  38. ncbi request reprint Integration of orientation information in amblyopia
    Behzad Mansouri
    McGill Vision Research Unit, 687 Pine Avenue West, Rm H4 14, Montreal, Quebec, Canada H3A 1A1
    Vision Res 44:2955-69. 2004
    ..Although internal noise was slightly elevated, there was no indication that fewer samples were used to achieve optimal performance. This finding suggests normal integration of local orientation signals in amblyopia...
  39. ncbi request reprint Integration of local motion is normal in amblyopia
    Robert F Hess
    McGill Vision Research Unit, Montreal, Quebec, Canada
    J Opt Soc Am A Opt Image Sci Vis 23:986-92. 2006
    ..45, 449 (2005)]. We suggest that these discrepancies for form and motion processing in amblyopia point to a selective problem in separating signal from noise in the typical global coherence task...
  40. ncbi request reprint Flank facilitation and contour integration: different sites
    Pi Chun Huang
    McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Que, Canada
    Vision Res 46:3699-706. 2006
    ..We conclude that the sites, and therefore the mechanisms, underlying these two seemingly related psychophysical phenomena are different...
  41. ncbi request reprint Integration, segregation, and binocular combination
    Behzad Mansouri
    McGill Vision Research, H4 14 Montreal, H3A 1A1 Quebec, Canada
    J Opt Soc Am A Opt Image Sci Vis 22:38-48. 2005
    ....
  42. pmc Sparsely distributed contours dominate extra-striate responses to complex scenes
    Serge O Dumoulin
    McGill Vision Research Unit, Department of Ophthalmology, McGill University, Montreal, Canada
    Neuroimage 42:890-901. 2008
    ..Later visual cortex (and to a modest degree V1) incorporates a facilitation of contour-based structure and suppressive interactions that effectively amplify sparse-contour information within natural images...
  43. ncbi request reprint Integration of first- and second-order orientation
    Harriet A Allen
    McGill Vision Research Unit, 687 Pine Avenue West, Room H4 14, Montreal, H3A 1A1, Quebec, Canada
    J Opt Soc Am A Opt Image Sci Vis 20:974-86. 2003
    ..The visual system appears to have separate integrators for combining local orientation across space for luminance- and contrast-defined features...
  44. ncbi request reprint Contrast gain control in natural scenes
    Peter J Bex
    Schepens Eye Research Institute, Harvard Medical School, Boston, MA 02114, USA
    J Vis 7:12.1-12. 2007
    ..This process tends to normalize the response of the visual system across natural scenes, which contain uneven contrast distributions...
  45. pmc Visual perception and its impairment in schizophrenia
    Pamela D Butler
    Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
    Biol Psychiatry 64:40-7. 2008
    ....