Temporal Perception, Aphasia and Déjà Vu

Efron, Robert

doi:10.1093/brain/86.3.403

Cited by 476 publications

(172 citation statements)

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“…Despite the relatively normal durational patterns produced by the RHD speakers, perception of the contrasts as produced by these speakers was much less accurate than for the other groups; these findings suggest that the RHD speakers were less able to adequately signal IPh boundaries, consistent with hypotheses that highlight the importance of the prosodic domain in determining hemispheric lateralization of prosodic processing (e.g., Baum & Dwivedi, 2003;Behrens, 1989;Gandour et al, 2003;Schirmer et al, 2001). The relatively mild impairments in temporal control exhibited by the LHD participants are consistent with the vast majority of previous investigations supporting a LH lateralization for the control of speech timing (e.g., Efron, 1963;Smith, 1980;see Blumstein, 1998 for review). Taken together, the findings are largely supportive of a cue lateralization hypothesis in which prosodic domain plays an important role (e.g., Gandour et al, 2003;Schirmer et al, 2001; see also Van Lancker & Sidtis, 1992).…”

Section: Discussionsupporting

confidence: 87%

Neural substrates of linguistic prosody: Evidence from syntactic disambiguation in the productions of brain-damaged patients

Shah¹,

Baum²,

Dwivedi³

2006

Brain and Language

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The present investigation focussed on the neural substrates underlying linguistic distinctions that are signalled by prosodic cues. A production experiment was conducted to examine the ability of left-(LHD) and right-(RHD) hemisphere damaged patients and normal controls to use temporal and fundamental frequency cues to disambiguate sentences which include one or more Intonational Phrase level (IPh) prosodic boundaries.Acoustic analyses of subjects' productions of three sentence-types -parentheticals, appositives, and tags -showed that LHD speakers, compared to RHD and normal controls, exhibited impairments in the control of temporal parameters signalling phrase boundaries, including inconsistent patterns of pre-boundary lengthening and longer-thannormal pause durations in non-boundary positions. Somewhat surprisingly, a perception test presented to a group of normal native listeners showed listeners experienced greatest difficulty in identifying the presence or absence of boundaries in the productions of the RHD speakers. The findings support a cue lateralization hypothesis in which prosodic domain plays an important role.

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Section: Discussionsupporting

confidence: 87%

Neural substrates of linguistic prosody: Evidence from syntactic disambiguation in the productions of brain-damaged patients

Shah¹,

Baum²,

Dwivedi³

2006

Brain and Language

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“…When recycled sequences consisted of different arbitrarily selected items (e.g., a sinusoidal tone, a square wave, and a noise), it was possible for listeners to distinguish between the different arrangements of items down to 5 msec/item (Warren, 1974). This study also provided further evidence for an important caveat first suggested by Ladefoged and Broadbent (1959) and by Efron (1963) on the basis of their experiments with two-item sequences: Once listeners are familiar with contrasting orders and are provided information, either directly or indirectly, concerning the nature and arrangement of constituent elements, then it is easy for them to provide an accurate analytic description by rote. Thus, under these conditions, order identificationdoes not precede, but follows the prior recognition of the overall pattern.…”

Section: Discussionsupporting

confidence: 54%

“…Ladefoged and Broadbent (1959) and Efron (1963) described this holistic pattern recognition for a sequence of two sounds presented as AB or BA. Garner and his associates (Garner & Gottwald, 1967, 1968Royer & Garner, 1970;Royer & Robin, 1986) described the organizational rules governing global pattern recognition for complex patterns consisting of two brief easily discriminated sounds (such as Tone A and Tone B), which were used to generate repeated patterns (for example, the recycled sequence ABAABBABAABBABA ... , in which the repeating unit is nine items long).…”

Section: Discussionmentioning

confidence: 99%

When acoustic sequences are not perceptual sequences: The global perception of auditory patterns

Warren

Bashford

1993

Perception & Psychophysics

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Warren, Bashford, and Gardner (1990) found that when sequences consisting of 10 40-msec steady-state vowels were presented in recycled format, minimal changes in order (interchanging the position of two adjacent phonemes) produced easily recognizable differences in verbal organization, even though the vowel durations were well below the threshold for identification of order. The present study was designed to determine if this ability to discriminate between different arrangements of components is limited to speech sounds subject to verbal organization, or if it reflects a more general auditory ability. In the first experiment, 10 40-msec sinusoidal tones were substituted for the vowels; it was found that the easy discrimination of minimal changes in order is not limited to speech sounds. A second experiment substituted 10 40-msec frozen noise segments for the vowels. The succession of noise segments formed a 400-msec frozen noise pattern that cannot be considered as a sequence of individual sounds, as can the succession of vowels or tones. Nevertheless, listeners again could discriminate between patterns differing only in the order of two adjacent 40-msec segments. These results, together with other evidence, indicate that it is not necessary for acoustic sequences of brief items (such as phonemes and tones) to be processed as perceptual sequences (that is, as a succession of discrete identifiable sounds) for different arrangements to be discriminated. Instead, component acoustic elements form distinctive "temporal compounds," which permit listeners to distinguish between different arrangements of portions of an acoustic pattern without the need for segmentation into an ordered series of component items. Implications for models dealing with the recognition of speech and music are discussed.A striking change in the mode of perception occurs when the duration of items in repeated sequences of steady-state vowels is below the lOO-msec threshold for identificationof temporal order. From 30 to 100 msec/item, the component vowels lose their identity, and the sequences are heard as illusory syllables and words consisting of consonants and vowels not present in the stimulus (Warren, Bashford, & Gardner, 1990). Different arrangements of the vowels produce different verbal forms, allowing permuted orders of vowels to be recognized. The ability to distinguish between different arrangements is such that minimal changes in sequences consisting of 10 40-msec vowels can be detected: When the positions of two contiguous vowels were interchanged, listeners distinguished between the sequences on the basis of the different words heard (Warren et al., 1990).This observation conflicts with models of speech recognition requiring both the identification and the ordering of individual speech sounds at an early stage in perceptual processing. Musicand speech are fast-paced auditory patterns thatoccur at rates above eight events per second, so it is clear that somehow people preserve order amongst successive sounds with durations in the ...

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“…At ®rst sight, this ®nding would seem to contradict the generally accepted dichotomy according to which, whilst the harmonic integration of sounds is primarily a function of the right hemisphere [7,23,26,29,35,40], the temporal integration of auditory events mainly involves left hemispheric structures [6,10,11,14,32,33].…”

Section: Discussionmentioning

confidence: 90%

Laterality in the perception of temporal cues of musical timbre

Brancucci

Martini

1999

Neuropsychologia

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Laterality in the perception of non-stationary aspects of musical timbre was investigated in 54 right-handed non-musicians. Timbre di erences were produced by altering the amplitude envelope of a steady-state complex tone. Two single-choice tests with attention directed to one ear were usedÐa dichotic test and a monaural test with contralateral white noise. Dependent variables were reaction time and accuracy. Both tests showed a signi®cant left ear advantage for reaction time. For the accuracy variable, a signi®cant left ear advantage was found only in the monaural test. Results are brie¯y discussed in terms of their compatibility with the generally accepted notion that spectral and temporal integrations of sounds are primarily functions of the right and left hemisphere, respectively. #

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Temporal Perception, Aphasia and Déjà Vu

Cited by 476 publications

References 0 publications

Neural substrates of linguistic prosody: Evidence from syntactic disambiguation in the productions of brain-damaged patients

Neural substrates of linguistic prosody: Evidence from syntactic disambiguation in the productions of brain-damaged patients

When acoustic sequences are not perceptual sequences: The global perception of auditory patterns

Laterality in the perception of temporal cues of musical timbre

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