Tactile enumeration of small quantities using one hand.

Our study explores various aspects of enumerating small quantities in the tactile modality. Fingertips of one hand were stimulated by a vibro-tactile apparatus (for 100/800 ms). Between 1 and 5 stimuli were presented to the right or the left hand and applied to neighboring (e.g., thumb-index-middle) or non-neighboring (e.g., thumb-middle-pinkie) fingers. The results showed a moderate increase in RT up to 4 stimuli and then a decrease for 5 stimuli. Right hand stimulation evoked more accurate performance than left hand stimulation only under short exposures (100 ms). Importantly, when the stimuli were presented to neighboring fingers, the accuracy rate was higher and the RT was faster than when presented to non-neighboring fingers. We discuss the results and suggest that when the stimuli are presented to one hand the subitizing range is 4 rather than 3. Furthermore, the right hand advantage and the efficiency for neighboring fingers are further support for the association between number and spatial arrangement of the fingers.

[1]  Myrthe A. Plaisier,et al.  Grabbing subitizing with both hands: bimanual number processing , 2009, Experimental Brain Research.

[2]  Oliver Lindemann,et al.  Finger Counting Habits in Middle Eastern and Western Individuals: An Online Survey , 2011 .

[3]  Mauro Pesenti,et al.  Place and summation coding for canonical and non-canonical finger numeral representations , 2010, Cognition.

[4]  Avishai Henik,et al.  Laterality briefed: Laterality modulates performance in a numerosity-congruity task , 2012, Consciousness and Cognition.

[5]  H. Wiese.  Iconic and non-iconic stages in number development: the role of language , 2003, Trends in Cognitive Sciences.

[6]  Daniel J. Acheson,et al.  Increased Alpha-Band Power during the Retention of Shapes and Shape-Location Associations in Visual Short-Term Memory , 2011, Front. Psychology.

[7]  Z. Pylyshyn,et al.  What enumeration studies can show us about spatial attention: evidence for limited capacity preattentive processing. , 1993, Journal of experimental psychology. Human perception and performance.

[8]  Marc Sato,et al.  On the relationship between handedness and hand-digit mapping in finger counting , 2008, Cortex.

[9]  Michael Andres,et al.  Finger counting: The missing tool? , 2008, Behavioral and Brain Sciences.

[10]  K. Sathian,et al.  Do the magnocellular and parvocellular visual pathways contribute differentially to subitizing and counting? , 1998, Perception & psychophysics.

[11]  H. Wiese.  Numbers, language, and the human mind , 2003 .

[12]  R. C. Oldfield.  The assessment and analysis of handedness: the Edinburgh inventory. , 1971, Neuropsychologia.

[13]  Justin A. Harris,et al.  The Topography of Tactile Learning in Humans , 2001, The Journal of Neuroscience.

[14]  R. Johansson,et al.  Tactile sensibility in the human hand: relative and absolute densities of four types of mechanoreceptive units in glabrous skin. , 1979, The Journal of physiology.

[15]  Charles Spence,et al.  Can Tactile Stimuli Be Subitised? An Unresolved Controversy within the Literature on Numerosity Judgments , 2008, Perception.

[16]  Andrew Simpson,et al.  Subitizing in Tactile Perception , 2006, Psychological science.

[17]  O Akin,et al.  Quantification of three-dimensional structures. , 1978, Journal of experimental psychology. Human perception and performance.

[18]  Luisa Girelli,et al.  Nature or Nurture in Finger Counting: A Review on the Determinants of the Direction of Number–Finger Mapping , 2011, Front. Psychology.

[19]  O. Renaud,et al.  Numerical Abilities in Children With Congenital Hemiplegia: An Investigation of the Role of Finger Use in Number Processing , 2014, Developmental neuropsychology.

[20]  J. Tzelgov,et al.  Expanding on the mental number line: zero is perceived as the "smallest". , 2012, Journal of experimental psychology. Learning, memory, and cognition.

[21]  L Girelli,et al.  Mapping Numbers on the Hand and on the Head: Which Direction? , 2009 .

[22]  Harold Bekkering,et al.  A Feeling for Numbers: Shared Metric for Symbolic and Tactile Numerosities , 2013, Front. Psychology.

[23]  Mauro Pesenti,et al.  Masked priming effect with canonical finger numeral configurations , 2008, Experimental Brain Research.

[24]  J. Ponsford.  Tactile spatial resolution in blind Braille readers , 2000, Neurology.

[25]  Margaret Wilson,et al.  Six views of embodied cognition , 2002, Psychonomic bulletin & review.

[26]  Range dependent processing of visual numerosity: similarities across vision and haptics , 2010, Experimental Brain Research.

[27]  Avishai Henik,et al.  Automatic and intentional processing of numerical information , 1992 .

[28]  Philippe Pinel,et al.  Distributed and Overlapping Cerebral Representations of Number, Size, and Luminance during Comparative Judgments , 2004, Neuron.

[29]  K. O. Johnson,et al.  Human tactile pattern recognition: active versus passive touch, velocity effects, and patterns of confusion. , 1991, Journal of neurophysiology.

[30]  Frank Domahs,et al.  Mind the gap between both hands: Evidence for internal finger-based number representations in children's mental calculation , 2008, Cortex.

[31]  Tony J. Simon,et al.  Computational evidence for the subitizing phenomenon as an emergent property of the human cognitive architecture , 2000, Cogn. Sci..

[32]  Luigi Cattaneo,et al.  Numbers within Our Hands: Modulation of Corticospinal Excitability of Hand Muscles during Numerical Judgment , 2007, Journal of Cognitive Neuroscience.

[33]  Astrid M L Kappers,et al.  One, two, three, many - subitizing in active touch. , 2009, Acta psychologica.

[34]  Á. Pascual-Leone,et al.  Tactile spatial resolution in blind Braille readers , 2000, Neurology.

[35]  Z. Pylyshyn,et al.  Why are small and large numbers enumerated differently? A limited-capacity preattentive stage in vision. , 1994, Psychological review.

[36]  M. Saling,et al.  Lateral Asymmetry and Tactile Sensitivity , 1988, Perceptual and motor skills.

[37]  Roi Cohen Kadosh,et al.  The laterality effect: Myth or truth? , 2008, Consciousness and Cognition.

[38]  Mauro PESENTI,et al.  Neuroanatomical substrates of Arabic number processing, numerical comparison and simple addition: A PET study. , 1998, NeuroImage.

[39]  Brian Butterworth,et al.  Are Subitizing and Counting Implemented as Separate or Functionally Overlapping Processes? , 2002, NeuroImage.

[40]  G. Mandler,et al.  Subitizing: an analysis of its component processes. , 1982, Journal of experimental psychology. General.

[41]  Martin H. Fischer,et al.  When Digits Help Digits: Spatial–Numerical Associations Point to Finger Counting as Prime Example of Embodied Cognition , 2011, Front. Psychology.

[42]  E. L. Kaufman,et al.  The discrimination of visual number. , 1949, The American journal of psychology.

[43]  Xavier Seron,et al.  About numerical representations: Insights from neuropsychological, experimental, and developmental studies. , 2005 .

[44]  J. Smeets,et al.  Haptic subitizing across the fingers , 2011, Attention, perception & psychophysics.

[45]  L. Barsalou.  Grounded cognition. , 2008, Annual review of psychology.

[46]  J. Smeets,et al.  Number magnitude to finger mapping is disembodied and topological , 2011, Experimental Brain Research.

[47]  Frank Domahs,et al.  Embodied numerosity: Implicit hand-based representations influence symbolic number processing across cultures , 2010, Cognition.

[48]  M. Finlayson,et al.  Handedness in Relation to Measures of Motor and Tactile-Perceptual Functions in Normal Children , 1976, Perceptual and motor skills.

[49]  Hubert Preissl,et al.  The right hand knows what the left hand is feeling , 2005, Experimental Brain Research.

[50]  Rolf A. Zwaan,et al.  Embodied Language: A Review of the Role of the Motor System in Language Comprehension , 2008, Quarterly journal of experimental psychology.