Optimizing digraph-latency based biometric typist verification systems: inter and intra typist differences in digraph latency distributions

Doug P Mahar; R Napier; M Wagner; W Laverty; R D Henderson; M Hiron

doi:10.1006/ijhc.1995.1061

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Optimizing digraph-latency based biometric typist verification systems: inter and intra typist differences in digraph latency distributions

Journal article

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Optimizing digraph-latency based biometric typist verification systems: inter and intra typist differences in digraph latency distributions

Doug P Mahar, R Napier, M Wagner, W Laverty, R D Henderson and M Hiron

International Journal of Human - Computer Studies, Vol.43(4), pp.579-592

1995

DOI: https://doi.org/10.1006/ijhc.1995.1061

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Abstract

Information and Computing Sciences

Psychology and Cognitive Sciences

Umphress and Williams have shown that individual differences in digraph latency may provide a means of accurately verifying the identity of computer users. The present research refined this technique by exploring inter and intra subject differences in digraph latency distributions. Experiment 1 showed that there is marked heterogeneity in the latency with which individual subjects type different digraphs. Consequently, it was found that typist verification accuracy improved when a digraph-specific index of the distance between test and reference digraph latencies was employed. Experiment 1 also showed the utility of nonlinear modelling as a tool to establish optimum verification parameter settings. Experiment 2 showed that the use of a common low-pass temporal filter cutoff setting for all typists when screening digraphs is unwise. It was found that there is a significant interaction between subjects and filter settings such that verification accuracy may improve if subject-specific filter settings are used.

Details

Title: Optimizing digraph-latency based biometric typist verification systems: inter and intra typist differences in digraph latency distributions
Authors: Doug P Mahar (Author) - Queensland University of Technology
R Napier (Author) - Australian National University
M Wagner (Author) - Australian National University
W Laverty (Author) - University of Canberra
R D Henderson (Author) - University of Canberra
M Hiron (Author) - Australian National University
Publication details: International Journal of Human - Computer Studies, Vol.43(4), pp.579-592
Publisher: Academic Press
Date published: 1995
DOI: 10.1006/ijhc.1995.1061
ISSN: 1071-5819
Organisation Unit: School of Social Sciences - Legacy; University of the Sunshine Coast, Queensland; Engage Research Lab
Language: English
Record Identifier: 99447782002621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Computer Science, Cybernetics; Ergonomics; Psychology, Multidisciplinary