Visual Recognition Memory Test Performance was Improved in Older Adults by Extending Encoding Time and Repeating Test Trials

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  • Theppitak Chalermsiri
    Department of Ergonomics, University of Occupational and Environmental Health
  • Lai Viet
    Department of Ergonomics, University of Occupational and Environmental Health
  • Izumi Hiroyuki
    Department of Ergonomics, University of Occupational and Environmental Health
  • Higuchi Yoshiyuki
    Department of Physical and Health Education, Fukuoka University of Education
  • Kumudini Ganga
    Department of Ergonomics, University of Occupational and Environmental Health
  • Movahed Mehrnoosh
    Department of Ergonomics, University of Occupational and Environmental Health
  • Kumashiro Masaharu
    Department of Ergonomics, University of Occupational and Environmental Health
  • Fujiki Nobuhiro
    Department of Ergonomics, University of Occupational and Environmental Health

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Objectives: The aim of this study was to investigate whether the combination of extension of the encoding time and repetition of a test trial would improve the visual recognition memory performance in older adults. Methods: We evaluated visual memory performance in young and older adults on a Yes-No recognition memory test under four different conditions. The conditions consisted of combinations of encoding times of two and four seconds (E2 and E4) and first and second retrieval practice test trials (T1 and T2): E2T1, E2T2, E4T1 and E4T2. Performance was evaluated by measuring hit rates, false alarm rates, discrimination ability and response bias. Results: Older adults showed better improvement of hit rate and discrimination ability under the E4T2 conditions whereas young adults showed better memory performance under the E2T2 conditions. Conclusions: A longer encoding time and repetition of the test was effective in improving the visual memory performance in terms of the hit rates and discrimination ability of older adults. The results suggest that this strategy should be useful in providing a suitable work environment for older workers.(J Occup Health 2014; 56: 453–460)

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