Self-awareness deficits following loss of inner speech: Dr. Jill Bolte Taylor's case study

In her 2006 book “My Stroke of Insight” Dr. Jill Bolte Taylor relates her experience of suffering from a left hemispheric stroke caused by a congenital arteriovenous malformation which led to a loss of inner speech. Her phenomenological account strongly suggests that this impairment produced a global self-awareness deficit as well as more specific dysfunctions related to corporeal awareness, sense of individuality, retrieval of autobiographical memories, and self-conscious emotions. These are examined in details and corroborated by numerous excerpts from Taylor’s book.     

复合词在言语产生的词汇通达中的表征

言语产生研究对于复合词的通达形成什么表征存在分歧。是形成整词表征还是分解为词素表征？用整词和词素频率效应考察,荷兰语的结果支持复合词的分离阶段通达模型和相应的分解表征假设,汉语和英语的结果支持复合词的独立网络通达模型和相应的整词表征假设。本文经过文献回顾指出,词汇表征不同于心理词典,语言、加工方式和加工通道都很可能造成复合词表征的差异。     

元记忆监控对外语语音信息加工的影响

这项研究在元记忆监控环境下考查真实教学情景中学习者对外语语音信息加工的实际效果。结果表明：在外文单词听觉再认与外文单词听觉再现测验中,无论是及时测验还是延时测验,实验组的成绩都明显高于控制组,元记忆训练对外语语音信息的加工是有影响的。     

Frontal brain electrical activity (EEG) and heart rate in response to affective infant-directed (ID) speech in 9-month-old infants

Many studies have shown that infants prefer infant-directed (ID) speech to adult-directed (AD) speech. ID speech functions to aid language learning, obtain and/or maintain an infant's attention, and create emotional communication between the infant and caregiver. We examined psychophysiological responses to ID speech that varied in affective content (i.e., love/comfort, surprise, fear) in a group of typically developing 9-month-old infants. Regional EEG and heart rate were collected continuously during stimulus presentation. We found the pattern of overall frontal EEG power was linearly related to affective intensity of the ID speech, such that EEG power was greatest in response to fear, than surprise than love/comfort; this linear pattern was specific to the frontal region. We also noted that heart rate decelerated to ID speech independent of affective content. As well, infants who were reported by their mothers as temperamentally distressed tended to exhibit greater relative right frontal EEG activity during baseline and in response to affective ID speech, consistent with previous work with visual stimuli and extending it to the auditory modality. Findings are discussed in terms of how increases in frontal EEG power in response to different affective intensity may reflect the cognitive aspects of emotional processing across sensory domains in infancy.     

An interaction between prosody and statistics in the segmentation of fluent speech

Sensitivity to prosodic cues might be used to constrain lexical search. Indeed, the prosodic organization of speech is such that words are invariably aligned with phrasal prosodic edges, providing a cue to segmentation. In this paper we devise an experimental paradigm that allows us to investigate the interaction between statistical and prosodic cues to extract words from a speech stream. We provide evidence that statistics over the syllables are computed independently of prosody. However, we also show that trisyllabic sequences with high transition probabilities that straddle two prosodic constituents appear not to be recognized. Taken together, our findings suggest that prosody acts as a filter, suppressing possible word-like sequences that span prosodic constituents.     

Further evaluation of emerging speech in children with developmental disabilities: training verbal behavior

The conceptual basis for many effective language-training programs are based on Skinner's (1957) analysis of verbal behavior. Skinner described several elementary verbal operants including mands, tacts, intraverbals, and echoics. According to Skinner, responses that are the same topography may actually be functionally independent. Previous research has supported Skinner's assertion of functional independence (e.g., Hall & Sundberg, 1987; Lamarre & Holland, 1985), and some research has suggested that specific programming must be incorporated to achieve generalization across verbal operants (e.g., Sigafoos, Reichle, & Doss, 1990). The present study provides further analysis of the independence of verbal operants when teaching language to children with autism and other developmental disabilities. In the current study, 3 participants' vocal responses were first assessed as mands or tacts. Generalization for each verbal operant across alternate conditions was then assessed and subsequent training provided as needed. Results indicated that generalization across verbal operants occurred across some, but not all, vocal responses. These results are discussed relative to the functional independence of verbal operants as described by Skinner.     

Assessment of the functions of vocal behavior in children with developmental disabilities: a replication

Although experimental analysis methodologies have been useful for identifying the function of a wide variety of target behaviors (e.g., Iwata, Dorsey, Slifer, Bauman, & Richman, 1982/1994), only recently have such procedures been applied to verbal operants (Lerman et al., 2005). In the current study, we conducted a systematic replication of the methodology developed by Lerman et al. Participants were 4 children who had been diagnosed with developmental disabilities and who engaged in limited vocal behavior. The function of vocal behavior was assessed by exposing target vocal responses to experimental analyses. Results showed that experimental analyses were generally useful for identifying the functions of vocal behavior across all participants.     

On Mill,Infallibility, and Freedom of Expression

Philosophers have tended to dismiss John Stuart Mill’s claim that ‘all silencing of discussion is an assumption of infallibility’. I argue that Mill’s ‘infallibility claim’ is indeed open to many objections, but that, contrary to the consensus, those objections fail to defeat the anti-authoritarian thesis which lies at its core. I then argue that Mill’s consequentialist case for the liberty of thought and discussion is likewise capable of withstanding some familiar objections. My purpose is to suggest that Mill’s anti-authoritarianism and his faith in thought and discussion, when taken seriously, supply the basis for a ‘public interest’ account of ‘freedom of expression as the liberty of thought and discussion’ which is faithful to Mill in spirit, if not to the precise letter. I outline such an account, which – as I say in conclusion – can serve as a valuable safeguard against ad hoc, reactive legislation, and the demands of a spurious communitarianism.     

前额叶在双语词汇通达中的抑制作用——对一例前额叶损伤双语病人的研究

先前研究表明,双语词汇产生和双语词汇理解过程中存在着抑制机制。本实验以一例前额叶损伤中-英双语病人为研究对象,通过让其完成系统的语言测试任务和认知实验任务,考察了双语词汇通达过程中抑制机制的神经基础。总的实验结果初步表明,前额叶在双语词汇通达过程中发挥着重要的抑制作用。     

Parametrically Dissociating Speech and Nonspeech Perception in the Brain Using fMRI

Candidate brain regions constituting a neural network for preattentive phonetic perception were identified with fMRI and multivariate multiple regression of imaging data. Stimuli contrasted along speech/nonspeech, acoustic, or phonetic complexity (three levels each) and natural/synthetic dimensions. Seven distributed brain regions' activity correlated with speech and speech complexity dimensions, including five left-sided foci [posterior superior temporal gyrus (STG), angular gyrus, ventral occipitotemporal cortex, inferior/posterior supramarginal gyrus, and middle frontal gyrus (MFG)] and two right-sided foci (posterior STG and anterior insula). Only the left MFG discriminated natural and synthetic speech. The data also supported a parallel rather than serial model of auditory speech and nonspeech perception.