Abstract
Many children pass through a mirror stage in reading, where they write individual letters or digits in mirror and find it difficult to correctly utilize letters that are mirror images of one another (e.g., b and d). This phenomenon is thought to reflect the fact that the brain does not naturally discriminate left from right. Indeed, it has been argued that reading acquisition involves the inhibition of this default process. In the current study, we tested the ability of literate pigeons, which had learned to discriminate between 30 and 62 words from 7832 nonwords, to discriminate between words and their mirror counterparts. Subjects were sensitive to the left–right orientation of the individual letters, but not the order of letters within a word. This finding may reflect the fact that, in the absence of human-unique top-down processes, the inhibition of mirror generalization may be limited.
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References
Ahr E, Houdé O, Borst G (2016) Inhibition of the mirror generalization process in reading in school-aged children. J Exp Child Psychol 145:157–165. doi:10.1016/j.jecp.2015.12.009
Beale I, Williams R, Webster D, Corballis MC (1972) Confusion of mirror images by pigeons and interhemispheric commissures. Nature 238:348–349. doi:10.1038/238348a0
Cavoto KK, Cook RG (2001) Cognitive precedence for local information in hierarchical stimulus processing by pigeons. J Exp Psychol Anim Behav Process 27:3–16. doi:10.1037/0097-7403.27.1.3
Corballis MC, Beale I (1970) Bilateral symmetry and behavior. Psychol Rev 77:451–464. doi:10.1037/h0029805
Cornell JM (1985) Spontaneous mirror-writing in children. Can J Exp Psychol 39:174–179
Dehaene S (2009) Reading in the brain: the new science of how we read. Viking Penguin, New York
Dehaene S, Cohen L, Sigman M, Vinckier F (2005) The neural code for written words: a proposal. Trends Cogn Sci 9:335–341. doi:10.1016/j.tics.2005.05.004
Grainger J, Dufau S, Montant M, Ziegler JC, Fagot J (2012) Orthographic processing in baboons (Papio papio). Science 336:245–248. doi:10.1126/science.1218152
Mello NK (1965) Interhemispheric reversal of mirror-image oblique lines after monocular training in pigeons. Science 148:252–254. doi:10.1126/science.148.3667.252
Pegado F, Nakamura K, Hannagan T (2014) How does literacy break mirror invariance in the visual system? Front Psych 5:703. doi:10.3389/fpsyg.2014.00703
Scarf D, Boy K, Reinert AU, Devine J, Güntürkün O, Colombo M (2016) Orthographic processing in pigeons (Columba livia). Proc Natl Acad Sci 113:11272–11276. doi:10.1073/pnas.1607870113
Watanabe S (1975) Interocular transfer of generalization along line-tilt dimension in pigeons: a separation of three types of symmetric stimuli. J Psych Res 17:133–140. doi:10.4992/psycholres1954.17.133
Watanabe S (1979) Mirror image discrimination with each eye in pigeons. Physiol Behav 22:331–337. doi:10.1016/0031-9384(79)90095-7
Yarkoni T, Balota D, Yap M (2008) Moving beyond Coltheart’s N: a new measure of orthographic similarity Psychon. B Rev 15:971–979. doi:10.3758/PBR.15.5.971
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This work was supported by University of Otago Department of Psychology research funds to M.C.
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This research was approved by the University of Otago Animal Ethics Committee.
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Scarf, D., Corballis, M.C., Güntürkün, O. et al. Do ‘literate’ pigeons (Columba livia) show mirror-word generalization?. Anim Cogn 20, 999–1002 (2017). https://doi.org/10.1007/s10071-017-1116-4
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DOI: https://doi.org/10.1007/s10071-017-1116-4