Although deterioration of higher-order visual information processing abilities occurs in Alzheimer's disease (AD), few cross-sectional or longitudinal studies have systematically examined this deficit. The performance of 135 patients with probable AD and 97 matched normal control (NC) participants were compared on a structured test of perceptual organization ability, the Hooper Visual Organizat...

This study investigated the significant acoustic cues used in the perception of aspiration contrast in Cantonese initial stops by normal hearing adults. The effects of vowel characteristics, aspiration noise level and voice-onset time (VOT) duration on aspiration perception in Cantonese initial stops were studied. The stimuli were consonant-vowel (CV) real words recorded by a male Cantonese nat...

Voice Onset Time (VOT) is considered as one of the best methods for examining the timing of voicing in stop consonants and has been applied in the study of many languages. The present study is designed to examine VOT production for phonetically voiceless stops in Mandarin and English by native Chinese speakers. Thirty-six Taiwanese Chinese speakers recruited from National Cheng Kung University ...

OBJECTIVE To determine whether the N1-P2 complex reflects training-induced changes in neural activity associated with improved voice-onset-time (VOT) perception. DESIGN Auditory cortical evoked potentials N1 and P2 were obtained from 10 normal-hearing young adults in response to two synthetic speech variants of the syllable /ba/. Using a repeated measures design, subjects were tested before a...

The left ventral occipitotemporal cortex (vOT) is important in visual word recognition. Studies have shown that the left vOT is generally observed to be involved in spoken language processing in skilled readers, suggesting automatic access to corresponding orthographic information. However, little is known about where and how the left vOT is involved in the spoken language processing of young c...

Voice onset time (VOT) signifies the interval between consonant onset and the start of rhythmic vocal-cord vibrations. Differential perception of consonants such as /d/ and /t/ is categorical in American English, with the boundary generally lying at a VOT of 20-40 ms. This study tests whether previously identified response patterns that differentially reflect VOT are maintained in large-scale p...

In this study, cross-dialectal variation in the use of the acoustic cues of VOT and F0 to mark the laryngeal contrast in Korean stops is examined with Chonnam Korean and Seoul Korean. Prior experimental results (Han & Weitzman, 1970; Hardcastle, 1973; Jun, 1993 &1998; Kim, C., 1965) show that pitch values in the vowel onset following the target stop consonants play a supplementary role to VOT i...

Voice onset time (VOT) is a salient acoustic parameter of speech which signals the 'voiced' and 'voiceless' status of plosives in English (e.g. the initial sound in 'bat' versus the initial sound in 'pat'). As a micro-temporal acoustic parameter, VOT may be sensitive to changes in hormones which may affect the neuromuscular systems involved in speech production. This study adopted a novel appro...

OBJECTIVE The aim of this study was to determine whether, in young children, a cortical neurophysiologic representation of the voicing status of a stop consonant could be found in the absence of the N1 component in the cortical auditory evoked potential (CAEP). In adults, a 'double-on' N1 response is often considered a cortical marker of VOT representation. METHODS Scalp-recorded CAEPs were m...

The research investigated development of voice onset time (VOT) contrasts in children who spoke Jordanian Arabic. factors were: (1) the age at which VOT contrast is acquired; and (2) role place articulation emphasis on development. One hundred twenty (60 males, 60 females; range 2;0–7;11) produced word-initial plosives. Linear Mixed Model (LMM), Bonferroni post hoc t test analyses were conducte...