This research project investigates lexical representations in long-term memory and the processes that access those representations. Most theories assume that the speech wave form is converted to a string of phonemes which is then compared to the mental lexicon. When comparison yields a match, the word is """"""""recognized"""""""". This typical view emphasizes the abstract properties of words. A speech signal containing idiosyncratic information (speaker's voice, ambient noise, etc.) is converted to a sequence of ideal, abstract phonemes, which is used to access ideal, abstract words. Few theories consider idiosyncracies of speech as more than """"""""noise"""""""" in the signal. However, multiple-trace memory models posit that details of perceptual experience are not forgotten; instead, they are integral to later perception. The proposed research will test a multiple-trace model of the mental lexicon, using speech perception and memory data (Project 1), and speech production data from a novel shadowing paradigm (Project 2). Preliminary research and pilot simulations of Hintzman's (1986) MINERVA 2 model have already produced encouraging results. The investigators plan to test the predictive limits of the extant model, and to test embellished versions as necessary. In Project 1, perception and memory experiments will test the level of detail and the durability of episodic memory traces produced in spoken word recognition, and will carefully assess the relationship of memory and perception. In Project 2, the model is tested against speech production data from a single-word shadowing task. The typical dependent measure in shadowing is response time; an alternative, rarely- used measure is the acoustic-phonetic content of the Ss' speech responses. Project 2 will examine changes in speech acoustics during single-word shadowing. Stimulus words for Ss to shadow will be produced by multiple speakers, including males and females.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
First Independent Research Support & Transition (FIRST) Awards (R29)
Project #
5R29DC002629-04
Application #
2700953
Study Section
Sensory Disorders and Language Study Section (CMS)
Project Start
1995-05-01
Project End
2000-04-30
Budget Start
1998-05-01
Budget End
1999-04-30
Support Year
4
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Arizona State University-Tempe Campus
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
188435911
City
Tempe
State
AZ
Country
United States
Zip Code
85287
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Goldinger, S D; Kleider, H M; Shelley, E (1999) The marriage of perception and memory: creating two-way illusions with words and voices. Mem Cognit 27:328-38
Goldinger, S D (1999) Only the shadower knows: comment on Hamburger and Slowiaczek (1996). Psychon Bull Rev 6:347-51;discussion 352-5
Gottlob, L R; Goldinger, S D; Stone, G O et al. (1999) Reading homographs: orthographic, phonologic, and semantic dynamics. J Exp Psychol Hum Percept Perform 25:561-74
Goldinger, S D (1998) Signal detection comparisons of phonemic and phonetic priming: the flexible-bias problem. Percept Psychophys 60:952-65
Goldinger, S D (1998) Echoes of echoes? An episodic theory of lexical access. Psychol Rev 105:251-79
Abramson, M; Goldinger, S D (1997) What the reader's eye tells the mind's ear: silent reading activates inner speech. Percept Psychophys 59:1059-68
Goldinger, S D (1996) Words and voices: episodic traces in spoken word identification and recognition memory. J Exp Psychol Learn Mem Cogn 22:1166-83