Bach, M. (1996). The Freiburg Visual Acuity test: Automatic measurement of visual
acuity. Optometry Visual Science, 49-53. Retrieved from
http://www.michaelbach.de/fract/index.html
Barlow, H. B. & Reeves, B. C. (1979) The versatility and absolute efficiency of
detecting mirror symmetry in random dot displays. Vision Research, 19, 783-793.
doi:10.1016/0042-6989(79)90154-8
Barrett, B. T., Whitaker, D., McGraw, P.V., & Herbert, A. M. (1999) Discriminating
mirror symmetry in foveal and extra-foveal vision. Vision Research, 39, 3737-
3744. doi:10.1016/S0042-6989(99)00083-8
Bouma, H. (1970). Interaction effects in parafoveal letter recognition. Nature,
226(5241), 177-178.
Chung, S. T. L., Li, R. W., & Levi, D. M. (2007). Crowding between first and second
order letter stimuli in normal foveal and peripheral vision. Journal of Vision, 7, 1–
13. doi:10.1167/7.2.10
Cowey, A. & Rolls, E.T. (1974) Human cortical magnification factor and its relation
to visual acuity. Experimental Brain Research, 21, 447–454. Retrieved from
http://www.ncbi.nlm.nih.gov/pubmed/4442497
Connolly, M. & Van Essen, D. (1984) The representation of the visual field in
parvicellular and magnocellular layers of the lateral geniculate nucleus in the
macaque monkey. Journal of Comparative Neurology, 226(4), 544-64. Retrieved
from http://www.ncbi.nlm.nih.gov/pubmed/6747034.
Danilova, M. V. & Bondarko, V. M. (2007). Foveal contour interactions and
crowding effects at the resolution limit of the visual system. Journal of Vision,
7(2):25, 21-18. doi: 10.1167/7.2.25
Daniel, P. M. & Whitteridge, D. (1961) The representation of the visual field on the
cerebral cortex of monkeys. Journal of Physiology, 159, 203-221. Retrieved from
http://jp.physoc.org/content/159/2/203.long
Drasdo, N. (1977) The neural representation of visual space. Nature, 266(5602), 554-
556. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/859622.
Dow, B. M., Snyder, A.Z., Vautin, R. G., & Bauer, R. (1981) Magnification factor
and receptive field size in foveal striate cortex of the monkey. Experimental Brain
Research, 44(2):213-28. doi: 10.1007/BF00237343
Feng, C., Jiang, Y. & He, S. (2007). Horizontal and vertical asymmetry in visual spatial
crowding effects. Journal of Vision, 7(2):13, 1-10. doi: 10.1167/7.2.13
Flom, M. C., Weymouth, F. W., & Kahneman, D. (1963) Visual resolution and
contour interaction. Journal of the Optical Society of America, 53(9), 1026-1032.
Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/14065335
Gurnsey, R., Herbert, A. M., & Kenemy, J. (1998a). Bilateral symmetry embedded in
noise is detected accurately only at fixation. Vision Research, 38, 3795-3803.
doi:10.1016/S0042-6989(98)00106-0
Gurnsey, R., Herbert, A., & Nguyen-Tri, D. (1998b). Bilateral Symmetry is not detected
in parallel. Canadian Society for Brain, Behaviour and Cognitive Science. June,
Ottawa.
Gurnsey, R., Roddy, G., & Chanab, W. (2011). Crowding and multiple magnification
theory. Journal of Vision, 11(7), [in process] doi: 10.1167/11.7.15
Gurnsey, R., Roddy, G., Ouhnana, M., & Troje, N. F. (2008) Stimulus magnification
equates identification and discrimination of biological motion across the visual
field. Vision Research, 48(28), 2827-2834. doi:10.1016/j.visres.2008.09.016
He, S., Cavanagh, P., & Intriligator, J. (1996) Attentional resolution and the locus of
visual awareness. Nature, 383(6598), 334-337. doi:10.1016/S1364-
6613(97)89058-4
Hodgson, D. (2011) The first appearance of symmetry in the human lineage: Where
perception meets art. Symmetry, 3, 37-53. doi:10.3390/sym3010037
Horridge, G. A. (1996). The honeybee (Apis mellifera) detects bilateral symmetry and
discriminates its axis, Journal of Insect Physiology. 42, 755–764. Retrieved from
http://www.mendeley.com/research/the-honeybee-apis-mellifera-detects-bilateralsymmetry-
and-discriminates-its-axis-1/
Hubel, D. H. & Weisel, T. N. (1974) Uniformity of monkey striate cortex: a parallel
relationship between field size, scatter, and magnification factor. Journal of
Comparative Neurology, 158(3), 295-305. doi: 10.1002/cne.901580305
Jenkins, B. (1982) Redundancy in the perception of bilateral symmetry in dot
textures. Perception & Psychophysics, 32(2), 171 – 177. doi:
10.3758/BF03204276
Jenkins, B. (1983) Component processes in the perception of bilaterally symmetric dot
textures. Perception & Psychophysics, 34, 433-440. doi: 10.3758/BF03203058
Jenkins, B. (1985) Orientational Anistropy in the human visual system. Perception &
Psychophysics, 37(2), 125-134. doi: 10.3758/BF03202846
Kleiner M, Brainard, D. H., & Pelli, D. G. (2007). What's new in Psychtoolbox-3?
Perception (ECVP Abstract Supplement), 14.
Korte, W. (1923) Uber die Gestaltauffassung im indirekten Sehen. Zeitschrift fu¨r
Psychologie, 93, 17–82, Quoted translation by Uta Wolfe appeared in Pelli et al.
2004.
Latham, K. & Whitaker, D. (1996) Relative roles of resolution and spatial interference
in foveal and peripheral vision. Ophthalmic Physiological Optics, 61 (1), 49-57.
doi: 10.1046/j.1475-1313.1996.95001247.x
Levi, D. M. (2008) Crowding-an essential bottleneck for object recognition: a minireview.
Vision Research, 48(5), 635-654. doi:10.1016/j.visres.2007.12.009
Levi, D. M. & Carney, T. (2009) Crowding in peripheral vision: Why bigger is better.
Current Biology, 19, 1988-1993. doi: 10.1167/11.1.10
Levi, D. M., Hariharan, S., & Klein, S. A. (2002a) Suppressive and facilitatory spatial
interactions in peripheral vision: peripheral crowding is neither size invariant nor
simple contrast masking. Journal of Vision, 2(2), 167-177. doi:10.1167/2.2.3
Levi, D. M., Klein, S. A., & Aitsebaomo, A.P., (1985) Vernier acuity, crowding and
cortical magnification. Vision Research, 25, 963-977. doi:10.1016/0042-
6989(85)90207-X
Levi, D. M., Klein, S. A., & Hariharan, S. (2002b
) Suppressive and facilitatory spatial
interactions in foveal vision: foveal crowding is simple contrast masking. Journal
of Vision, 2(2), 140-166. doi:10.1167/2.2.2Liu, L., & Arditi, A. (2000) Apparent string shortening concomitant with letter
crowding. Vision Research, 40, 1059-1067. doi:10.1016/S0042-6989(99)00247-3
Livne, T. & Sagi, D. (2010) How do flankers relations affect crowding? Journal of
Vision, 10(3), 1-14. doi:10.1167/10.3.1
Locher, P. J. & Wagemans, J. (1993) Effects of element type and spatial grouping on
symmtery detection. Perception, 22(5), 565-587. doi:10.1068/p220565
Makela, P., Whitaker, D., & Rovamo, J. (1993). Modelling of orientation discrimination
across the visual field. Vision Research, 33, 723–730. doi:10.1016/0042-
6989(93)90192-Y
Melmoth, D. R., Kukkonen, H. T., Mäkelä, P. K., & Rovamo, J. M. (2000). The effect
of contrast and size scaling on face perception in foveal and extrafoveal vision.
Investigative Ophthalmology and Visual Science, 41(9), 2811-2819. Retrieved
from http://www.iovs.org/content/41/9/2811.full.pdf+html
Moriyama, M. & Moriyama, M. (1999) A comparison between asymmetric Japanese
Ikebana and symmetric western flower arrangement. Forma, 14, 355-361.
Retrieved from
http://beepdf.com/doc/77592/a_comparison_between_asymmetric_japanese_ikeb
ana_and_symmetric_western_.html
Olivers, C. N. L. & Peter van der Helm (1998) Symmetry and selective attention: A
dissociation between effortless perception and serial search. Perception and
Psychophysics, 60(7), 1101-1116. doi: 10.3758/BF03206161
Parkes, L., Lund, J., Angelucci, A., Solomon, J. A., & Morgan, M. (2001).
Compulsory averaging of crowded orientation signals in human vision. Nature
Neuroscience, 4, 739-744. doi:10.1038/89532
Pelli, D. G. (2008). Crowding: a cortical constraint on object recognition. Current
Opinion in Neurobiology, 18(4), 445-451. doi: 10.1016/j.conb.2008.09.008
Pelli, D. G., Palomaras, M., & Majaj, N. J. (2004). Crowding is unlike ordinary
masking: Distinguishing feature integration from detection. Journal of Vision, 4,
1136-1169. doi:10.1167/4.12.12
Pelli, D. G., Tillman, K. A., Freeman, J., Su, M., Berger, T. D., & Majaj, N. J. (2007).
Crowding and eccentricity determine reading rate. Journal of Vision, 7(2), 21-36.
doi:10.1167/7.2.20
Perry, H. V. & Cowey, A. (1985) The ganglion cell and cone distributions in the
monkey's retina: Implications for central magnification factors. Vision Research,
25(12), 1795-1810. doi:10.1016/0042-6989(85)90004-5
Petrov, Y. & Popple, A. V. (2007) Crowding and surround suppression: Not to be
confused. Journal of Vision, 7(2), 1–9. doi: 10.1167/7.2.12
Poder, E. (2008) Crowding with coarse detection and coarse discrimination of simple
visual features. Journal of Vision, 8(4):24, 1-6. doi: 10.1167/8.4.24
Poder, E., & Wagemans, J. (2007) Crowding with conjunctions of simple features.
Journal of Vision, 7(2):23, 1-12. doi: 10.1167/7.2.23
Poirier, F. J. A. M. & Gurnsey, R., (1998). The effects of eccentricity and spatial
frequency on the orientation discrimination asymmetry. Spatial Vision, 349-66.
doi: 10.1163/156856898X00077
Poirier, F. J. A. M., & Gurnsey, R. (2002). Two eccentricity-dependent limitations on
subjective contour discrimination. Vision Research, 42(2), 227-238.
doi:10.1016/S0042-6989(01)00273-5
Rovamo, J., & Virsu, V. (1979). An estimation and application of the human cortical
magnification factor. Experimental Brain Research, 37(3), 495-510. doi:
10.1007/BF00236819
Saarela, T. P., Sayim, B., Westheimer, G., & Herzog, M. H. (2009). Global stimulus
configuration modulates crowding. Journal of Vision, 9(2):5, 1–11.
doi:10.1167/9.2.5
Saarela, T. P., Westheimer, G., & Herzog, M. H. (2010). The effect of spacing
regularity on visual crowding. Journal of Vision, 10(10):17, 1–7.
doi:10.1167/10.10.17
Saarinen, J. (1988) Detection of mirror symmetry in random dot patterns at different
eccentricities. Vision Research, 28 (6), 755-759. doi:10.1016/0042-
6989(88)90054-5
Saarinen, J, Rovamo, J., & Virsu, V. (1989). Analysis of spatial structure in eccentric
vision. Investigative Ophthalmology and Vision Science, 30 (2), 293-296.
Retrieved from http://www.iovs.org/content/30/2/293.long
Sally, S., & Gurnsey, R. (2001). Symmetry detection across the visual field. Spatial
Vision, 14(2), 217-234. doi: 10.1163/156856801300202940
Strasburger, H., Harvey, L. O., Jr., & Rentschler, I. (1991). Contrast thresholds for
identification of numeric characters in direct and eccentric view. Perception and
Psychophysics, 49, 495-508. Retrieved from
http://www.mendeley.com/research/contrast-thresholds-identification-numericcharacters-
direct-eccentric-view/
Swaddle, J. P., & Cuthill, I. C. (1993) Preference for symmetric males by female zebra
finches. Nature, 367, 165-166. doi:10.1038/367165a0
Thibos, L. N., Still, D. L., & Bradley, A. (1996) Characterization of spatial aliasing
and contrast sensitivity in peripheral vision. Vision Research, 36(2), 249-258.
doi:10.1016/0042-6989(95)00109-D
Thibos, L. N., Cheney, F. E., & Walsh, D. J. (1987) Retinal limits to the detection
and resolution of gratings. Journal of the Optical Society of America, 4(8), 1524-
1529. doi:10.1364/JOSAA.4.001524
Toet, A., & Levi, D. M. (1992). The two-dimensional shape of spatial interaction zones
in the parafovea. Vision Research, 32(7), 1349-1357. doi:
10.1163/156856894X00350
Treisman, A. M. & Gelade, G. A (1980) Feature-integration theory of attention.
Cognitive Psychology, 12, 97-136, doi:0010-0285(80)90005-5
Tripathy, S. P. & Cavanagh, P. (2002) The extent of crowding in peripheral vision
does not scale with target size, Vision Research, 42, 2357-2369.
doi:10.1016/S0042-6989(02)00197-9
Tyler, C. W. & Hardage, L. (1996) In Tyler, C. W., Editor. Human Symmetry
Perception, Utrecht, Netherlands: VSP, 157-171.
Tyler, C. W., Hardage, L., & Miller, R. T. (1995) Multiple mechanisms for the
detection of mirror symmetry. Spatial Vision, 9 (1), 79-100. doi:
10.1163/156856895X00124
Van der Helm, P. (2011) The influence of perception on the distribution of multiple
symmetries in nature and art. Symmetry, 3, 51-71. doi:10.3390/sym3010054
Virsu, V., Näsänen, R., & Osomoviita, K. (1987) Cortical magnification and
peripheral vision. Journal of the Optical Society of America, 4(8), 1568-1578.
doi:10.1364/JOSAA.4.001568
Wagemans, J. (1992) Perceptual use of nonaccidental properties. Canadian Journal of
Psychology, 46, 236-279. doi: 10.1037/h0084323
Wagemans, J. (1993) Skewed symmetry: A nonaccidental property used to perceive
visual forms. Journal of Experimental Psychology: Human Perception and
Performance, 19, 364-380. Retrieved from
http://www.sciencedirect.com/science/article/pii/S0096152302009379
Wagemans, J. (1995) Detection of visual symmetries. Spatial Vision, 9, 9-32. Retrived
from www.ncbi.nlm.nih.gov/pubmed/7626549
Watson, A. B. (1987) Estimation of local spatial scale. Journal of the Optical Society
of America A, 4, 1579–1582. doi:10.1364/JOSAA.4.001579
Watson, A. B., & Pelli, D. G. (1983). QUEST: A Bayesian adaptive psychometric
method. Perception & Psychophysics, 33, 113-120. Retrieved from
http://academic.research.microsoft.com/Publication/1972926
Wenderoth, P. (1994) The salience of vertical symmetry. Perception, 23, 221-236.
Retrieved from http://www.perceptionweb.com/abstract.cgi?id=p230221
Westheimer, G. (1982) The spatial grain of the perifoveal visual field. Vision Research,
22(1), 157-162. doi:10.1016/0042-6989(82)90177-8
Weymouth, F. W. (1958) Visual sensory units and the minimal angle of resolution.
American Journal of Ophthalmology, 46, 102-113.
Whitaker, D., Rovamo, J., MacVeigh, D., & Mäkelä, P. (1992) Spatial scaling of vernier
acuity tasks. Vision Research, 32(8), 1481-1491. doi:10.1016/0042-
6989(92)90204-V
Whitney, D., & Levi, D. (2011) Visual crowding: a fundamental limit on conscious
perception and object recognition. Trends in Cognitive Sciences, 15(4), 160-168.
doi:10.1016/j.tics.2011.02.005
Wilson, H. R., Levi, D., Maffei, L., Rovamo, J., & DeValois, R. (1990) The
perception of form: Retina to striate cortex. In L. Spillman and J. S. Werner
(Eds.), Visual Perception, The Neurophysiological Foundations. (pp. 231-272).
Academic Press, Inc.