No AccessJournal of Speech, Language, and Hearing ResearchResearch Article1 Dec 2016

Verbal Working Memory in Older Adults: The Roles of Phonological Capacities and Processing Speed

    Purpose

    This study examined the potential roles of phonological sensitivity and processing speed in age-related declines of verbal working memory.

    Method

    Twenty younger and 25 older adults with age-normal hearing participated. Two measures of verbal working memory were collected: digit span and serial recall of words. Processing speed was indexed using response times during those tasks. Three other measures were also obtained, assessing phonological awareness, processing, and recoding.

    Results

    Forward and reverse digit spans were similar across groups. Accuracy on the serial recall task was poorer for older than for younger adults, and response times were slower. When response time served as a covariate, the age effect for accuracy was reduced. Phonological capacities were equivalent across age groups, so we were unable to account for differences across age groups in verbal working memory. Nonetheless, when outcomes for only older adults were considered, phonological awareness and processing speed explained significant proportions of variance in serial recall accuracy.

    Conclusion

    Slowing in processing abilities accounts for the primary trajectory of age-related declines in verbal working memory. However, individual differences in phonological capacities explain variability among individual older adults.

    References

    • Andersson, U. (2002). Deterioration of the phonological processing skills in adults with an acquired severe hearing loss.European Journal of Cognitive Psychology, 14, 335–352.
    • Baddeley, A. D. (1966). Short-term memory for word sequences as a function of acoustic, semantic and formal similarity.Quarterly Journal of Experimental Psychology, 18, 362–365.
    • Baddeley, A. D. (1992). Working memory.Science, 255, 556–559.
    • Baddeley, A. D. (1995). Working memory.In M. S. Gazzaniga (Ed.), The cognitive neurosciences (pp. 755–764). Cambridge, MA: MIT Press.
    • Baddeley, A. D. (2007). Working memory, thought and action. Oxford, UK: Oxford University Press.
    • Baddeley, A. D., & Hitch, G. J. (1974). Working memory.In G. Bower (Ed.), The psychology of learning and motivation: Advances in research and theory (pp. 47–89). New York, NY: Academic Press.
    • Bar-Shalom, E. G., Crain, S., & Shankweiler, D. (1993). A comparison of comprehension and production abilities of good and poor readers.Applied Psycholinguistics, 14, 197–227.
    • Bopp, K. L., & Verhaeghen, P. (2005). Aging and verbal memory span: A meta-analysis.Journals of Gerontology Series B-Psychological Sciences and Social Sciences, 60, 223–233.
    • Brady, S., Shankweiler, D., & Mann, V. (1983). Speech perception and memory coding in relation to reading ability.Journal of Experimental Child Psychology, 35, 345–367.
    • Brysbaert, M., & New, B. (2009). Moving beyond Kucera and Francis: A critical evaluation of current word frequency norms and the introduction of a new and improved word frequency measure for American English.Behavior Research Methods, 41, 977–990.
    • Carpenter, P. A., Miyaki, A., & Just, M. A. (1994). Working memory constraints in comprehension: Evidence from individual differences, aphasia, and aging.In M. A. Gernsbacher (Ed.), Handbook of psycholinguistics (pp. 1075–1122). San Diego, CA: Academic Press.
    • Classon, E., Rudner, M., & Rönnberg, J. (2013). Working memory compensates for hearing related phonological processing deficit.Journal of Communication Disorders, 46, 17–29.
    • Conrad, R., & Hull, A. J. (1964). Information, acoustic confusion and memory span.British Journal of Psychology, 55, 429–432.
    • Cooper-Martin, E. (1994). Measures of cognitive effort.Marketing Letters, 5, 43–56.
    • F. I. Craik, & T. A. Salthouse (Eds.) (2000). The handbook of aging and cognition (2nd ed.). Mahwah, NJ: Erlbaum.
    • Crain, S. (1989). Why poor readers misunderstand spoken sentences.In D. Shankweiler & I. Y. Liberman (Eds.), Phonology and reading disability: Solving the reading puzzle (pp. 133–165). Ann Arbor: The University of Michigan Press.
    • DeCaro, R., Peelle, J. E., Grossman, M., & Wingfield, A. (2016). The two sides of sensory-cognitive interactions: Effects of age, hearing acuity, and working memory span on sentence comprehension.Frontiers in Psychology, 7, 236.
    • Faust, M. E., Balota, D. A., Spieler, D. H., & Ferraro, F. R. (1999). Individual differences in information-processing rate and amount: Implications for group differences in response latency.Psychological Bulletin, 125, 777–799.
    • Hale, S., Rose, N. S., Myerson, J., Strube, M. J., Sommers, M., Tye-Murray, N., & Spehar, B. (2011). The structure of working memory abilities across the adult life span.Psychology and Aging, 26, 92–110.
    • Hedden, T., & Gabrieli, J. D. (2004). Insights into the ageing mind: A view from cognitive neuroscience.Nature Reviews Neuroscience, 5, 87–96.
    • Lee, F. S., Matthews, L. J., Dubno, J. R., & Mills, J. H. (2005). Longitudinal study of pure-tone thresholds in older persons.Ear and Hearing, 26, 1–11.
    • Liberman, I. Y., & Shankweiler, D. (1985). Phonology and the problems of learning to read and write.Remedial and Special Education, 6, 8–17.
    • R. H. Logie, & G. M. Morris (Eds.) (2015). Working memory and ageing. New York, NY: Psychology Press.
    • Lyxell, B., Andersson, U., Borg, E., & Ohlsson, I. S. (2003). Working-memory capacity and phonological processing in deafened adults and individuals with a severe hearing impairment.International Journal of Audiology, 42(Suppl. 1), S86–S89.
    • Mann, V. A., & Liberman, I. Y. (1984). Phonological awareness and verbal short-term memory.Journal of Learning Disabilities, 17, 592–599.
    • Martin, N., & Brownell, R. (2011). Expressive One-Word Picture Vocabulary Test–Fourth Edition. Novato, CA: Academic Therapy.
    • Myerson, J., Emery, L., White, D. A., & Hale, S. (2003). Effects of age, domain, and processing demands on memory span: Evidence for differential decline.Aging Neuropsychology and Cognition, 10, 20–27.
    • Nittrouer, S. (1999). Do temporal processing deficits cause phonological processing problems?.Journal of Speech, Language, and Hearing Research, 42, 925–942.
    • Nittrouer, S., Caldwell-Tarr, A., & Lowenstein, J. H. (2013). Working memory in children with cochlear implants: Problems are in storage, not processing.International Journal of Pediatric Otorhinolaryngology, 77, 1886–1898.
    • Nittrouer, S., & Miller, M. E. (1999). The development of phonemic coding strategies for serial recall.Applied Psycholinguistics, 20, 563–588.
    • Nittrouer, S., Shune, S., & Lowenstein, J. H. (2011). What is the deficit in phonological processing deficits: Auditory sensitivity, masking, or category formation?.Journal of Experimental Child Psychology, 108, 762–785.
    • Norman, S., Kemper, S., Kynette, D., Cheung, H. T., & Anagnopoulos, C. (1991). Syntactic complexity and adults' running memory span.Journal of Gerontology, 46, 346–351.
    • Piolat, A., Olive, T., & Kellogg, R. T. (2005). Cognitive effort during note taking.Applied Cognitive Psychology, 19, 291–312.
    • Salame, P., & Baddeley, A. D. (1986). Phonological factors in STM: Similarity and the unattended speech effect.Bulletin of the Psychonomic Society, 24, 263–265.
    • Salthouse, T. A. (1996). The processing-speed theory of adult age differences in cognition.Psychological Review, 103, 403–428.
    • Salthouse, T. A., & Babcock, R. L. (1991). Decomposing adult age differences in working memory.Developmental Psychology, 27, 763–776.
    • Schneider, B. A., Daneman, M., & Murphy, D. R. (2005). Speech comprehension difficulties in older adults: Cognitive slowing or age-related changes in hearing?.Psychology and Aging, 20, 261–271.
    • Seymour, P. H. K., Aro, M., & Erskine, M. (2003). Foundation literacy acquisition in European orthographies.British Journal of Psychology, 94, 143–174.
    • Smith, S. T., Macaruso, P., Shankweiler, D., & Crain, S. (1989). Syntactic comprehension in young poor readers.Applied Psycholinguistics, 10, 429–454.
    • Smith, S. T., Mann, V. A., & Shankweiler, D. (1986). Spoken sentence comprehension by good and poor readers: A study with the Token Test.Cortex, 22, 627–632.
    • Snowling, M. (1998). Dyslexia as a phonological deficit: Evidence and implications.Child and Adolescent Mental Health, 3, 4–11.
    • Stein, C. L., Cairns, H. S., & Zurif, E. B. (1984). Sentence comprehension limitations related to syntactic deficits in reading-disabled children.Applied Psycholinguistics, 5, 305–322.
    • Stine, E. L., Wingfield, A., & Poon, L. W. (1986). How much and how fast: Rapid processing of spoken language in later adulthood.Psychology and Aging, 1, 303–311.
    • Tun, P. A. (1998). Fast noisy speech: Age differences in processing rapid speech with background noise.Psychology and Aging, 13, 424–434.
    • Wagner, R. K., & Torgesen, J. K. (1987). The nature of phonological processing and its causal role in the acquisition of reading skills.Psychological Bulletin, 101, 192–212.
    • Wechsler, D. (1997). Wechsler Adult Intelligence Scale–Third Edition. San Antonio, TX: The Psychological Corporation.
    • Wilkinson, G. S., & Robertson, G. J. (2006). The Wide Range Achievement Test–Fourth Edition. Lutz, FL: Psychological Assessment Resources.
    • Wingfield, A., & Grossman, M. (2006). Language and the aging brain: Patterns of neural compensation revealed by functional brain imaging.Journal of Neurophysiology, 96, 2830–2839.

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