Instance Theory Predicts Information Theory: Episodic Uncertainty as a Determinant of Keystroke Dynamics.
How does prior experience shape skilled performance in structured environments? We use skilled typing of natural text to evaluate correspondence between performance (keystroke timing) and structure in the environment (letter uncertainty). We had ~350 typists copy-type English text. We reproduced Ost...
| Published in: | Canadian Journal of Experimental Psychology / Revue Canadienne de Psychologie Expérimentale Vol. 73; no. 4; pp. 203 - 216 |
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| Main Authors: | , , |
| Format: | Article |
| Published: |
Canadian Psychological Association
Dec2019
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=139637098&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 139637098 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 11961961 CJX jtl: Canadian Journal of Experimental Psychology / Revue Canadienne de Psychologie Expérimentale issn: 11961961 maglogo: N pubinfo: dt: Dec2019 vid: 73 iid: 4 pid: 98 pub: Canadian Psychological Association artinfo: ui: 139637098 10.1037/cep0000182 ppf: 203 ppct: 13 formats: fmt: @attributes: type: P size: 3.4MB tig: atl: Instance Theory Predicts Information Theory: Episodic Uncertainty as a Determinant of Keystroke Dynamics. aug: au: Crump, Matthew J. C. Lai, Walter Brosowsky, Nicholaus P. affil: Brooklyn College of the City University of New York Graduate Center of the City University of New York su: Cognition Memory Psychology Task performance Keyboards (Electronics) Psychology of movement Theory sug: subj: Cognition Memory Psychology Task performance Computer Terminal and Other Computer Peripheral Equipment Manufacturing Computer and peripheral equipment manufacturing Keyboards (Electronics) Psychology of movement Theory keyword: entropy information theory instance theory performance typing entropy information theory instance theory performance typing ab: How does prior experience shape skilled performance in structured environments? We use skilled typing of natural text to evaluate correspondence between performance (keystroke timing) and structure in the environment (letter uncertainty). We had ~350 typists copy-type English text. We reproduced Ostry's (1983) analysis of interkeystroke interval as a function of letter position and word length, that showed prominent first-letter and midword slowing effects. We propose a novel account that letter position and word length effects on keystroke dynamics reflect informational uncertainty about letters in those locations, rather than resource limited planning/buffering processes. We computed positional uncertainty for letters in all positions of words from length one to nine using Google's n-gram database. We show that variance in interkeystroke interval by letter position and word length tracks natural variation in letter uncertainty. Finally, we provide a model showing how a general learning and memory process could acquire sensitivity to patterns of letter uncertainty in natural English. In doing so, we draw an equivalence between Logan's (1988) instance theory of automatization and Shannon's measure of entropy (H) from information theory. Instance theory's predictions for automatization as a function of experience follow exactly the uncertainty in the choice set being automatized. As a result, instance theory stands as a general process model explaining how context-specific experiences in a structured environment tune skilled performance. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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