Independence of lexical context and phonological information in speech perception.

M. A. Pitt (see record 1995-42750-001) studied the joint influence of phonological information and lexical context in W. F. Ganong's (1980) task. Pitt improved on earlier studies by collecting enough observations to make possible the quantitative analyses of an individual's data. The present article shows that the results of such analyses demonstrate that the integration of phonological information and lexical context is very well accounted for by the fuzzy logical model of perception (FLMP). Although Pitt concluded that the results of his research argued against the FLMP in favor of an interactive feedback system, his conclusion was based on an analysis of transformed results. It is argued that this use of a response transformation led to incorrect conclusions and that ultimately, models must be tested directly against observed behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Critique: articulatory-acoustic relations and their role in speech perception

These remarks are in response to "Role of articulation in speech perception: Clues from production"ony Bj?rn Lindblom. It is suggested that the form in which the lexicon is stored includes both segments and distinctive features, and this representation is neutral with respect to articulatory and the acoustic domains. The process by which features are determined from the sound requires that patterns of acoustic properties be identified. In developing models of speech perception, knowledge of articulatory-acoustic relations can be a guide in defining these properties, but it is not necessary for the models to assign primary status to articulation.     

The resonant dynamics of speech perception: Interword integration and duration-dependent backward effects.

How do listeners integrate temporally distributed phonemic information into coherent representations of syllables and words? For example, increasing the silence interval between the words gray chip may result in the percept great chip, whereas increasing the duration of fricative noise in chip may alter the percept to great ship (B. H. Repp, A. M. Liberman, T. Eccardt, and D. Pesetsky, 1978). The ARTWORD neural model quantitatively simulates such context-sensitive speech data. In ARTWORD, sequentially stored phonemic items in working memory provide bottom-up input to unitized list chunks that group together sequences of items of variable length. The list chunks compete with each other. The winning groupings feed back to establish a resonance which temporarily boosts the activation levels of selected items and chunks, thereby creating an emergent conscious percept whose properties match such data. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Compensation for coarticulation: Disentangling auditory and gestural theories of perception of coarticulatory effects in speech.

According to one approach to speech perception, listeners perceive speech by applying general pattern matching mechanisms to the acoustic signal (e.g., Diehl, Lotto, & Holt, 2004). An alternative is that listeners perceive the phonetic gestures that structured the acoustic signal (e.g., Fowler, 1986). The two accounts have offered different explanations for the phenomenon of compensation for coarticulation (CfC). An example of CfC is that if a speaker produces a gesture with a front place of articulation, it may be pulled slightly backwards if it follows a back place of articulation, and listeners' category boundaries shift (compensate) accordingly. The gestural account appeals to direct attunement to coarticulation to explain CfC, whereas the auditory account explains it by spectral contrast. In previous studies, spectral contrast and gestural consequences of coarticulation have been correlated, such that both accounts made identical predictions. We identify a liquid context in Tamil that disentangles contrast and coarticulation, such that the two accounts make different predictions. In a standard CfC task in Experiment 1, gestural coarticulation rather than spectral contrast determined the direction of CfC. Experiments 2, 3, and 4 demonstrated that tone analogues of the speech precursors failed to produce the same effects observed in Experiment 1, suggesting that simple spectral contrast cannot account for the findings of Experiment 1. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Face and mouth inversion effects on visual and audiovisual speech perception.

Three experiments examined whether image manipulations known to disrupt face perception also disrupt visual speech perception. Research has shown that an upright face with an inverted mouth looks strikingly grotesque whereas an inverted face and an inverted face containing an upright mouth look relatively normal. The current study examined whether a similar sensitivity to upright facial context plays a role in visual speech perception. Visual and audiovisual syllable identification tasks were tested under 4 presentation conditions: upright face-upright mouth, inverted face-inverted mouth, inverted face-upright mouth, and upright face-inverted mouth. Results revealed that for some visual syllables only the upright face-inverted mouth image disrupted identification. These results suggest that upright facial context can play a role in visual speech perception. A follow-up experiment testing isolated mouths supported this conclusion. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological effects of immoral actions: The experimental evidence.

Considers the psychological consequences of immoral actions. Research on the effects on adults of breaking conventionally defined moral rules in controlled experiments is critically reviewed, including aggression, counterattitudinal advocacy, dishonesty, and interpersonal damage studies. It is established that immoral actions do affect the transgressor, with most of the impact related to the transgression. In experimental settings, major distortions do not result. Methodological issues with dependent measures are indicated, and patterns of research activity are discussed. Sense of responsibility for immoral actions and subjective definition of behavior as immoral may mediate effects. Current theories on reaction to transgression—cognitive dissonance, equity restoration, guilt, and negative-state relief—are evaluated. Limitations of existing experimentation, ways to increase its relevance to the full range of immoral actions, and ethical issues in the experimental study of immorality are indicated. (85 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Improvements in speech perception by children with profound prelingual hearing loss: effects of device, communication mode, and chronological age

The present investigation expanded on an earlier study by Miyamoto, Osberger, Todd, Robbins, Karasek, et al. (1994) who compared the speech perception skills of two groups of children with profound prelingual hearing loss. The first group had received the Nucleus multichannel cochlear implant and was tested longitudinally. The second group, who were not implanted and used conventional hearing aids, was tested at a single point in time. In the present study, speech perception scores were examined over time for both groups of children as a function of communication mode of the child. Separate linear regressions of speech perception scores as a function of age were computed to estimate the rate of improvement in speech perception abilities that might be expected due to maturation for the hearing aid users (n=58) within each communication mode. The resulting regression lines were used to compare the estimated rate of speech perception growth for each hearing aid group to the observed gains in speech perception made by the children with multichannel cochlear implants. A large number of children using cochlear implants (n=74) were tested over a long period of implant use (m=3.5 years) that ranged from zero to 8.5 years. In general, speech perception scores for the children using cochlear implants were higher than those predicted for a group of children with 101-110 dB HL of hearing loss using hearing aids, and they approached the scores predicted for a group of children with 90-100 dB HL of hearing loss using hearing aids.     

Cross-language speech perception: Initial capabilities and developmental change.

This article reports three studies designed to increase our understanding of developmental changes in cross-language speech perception. In the first study, we compared adult speakers of English and Hindi on their ability to discriminate pairings from a synthetic voiced, unaspirated place-of-articulation continuum. Results indicated that English listeners discriminate two categories (ba vs. da), whereas Hindi listeners discriminate three (ba vs. da, and da vs. DA). We then used stimuli from within this continuum in the next two experiments to determine (a) if our previously reported finding (Werker & Tees, 1984a) of a reorganization between 6 and 12 months of life from "universal" to "language-specific" phonetic perception would be evident using synthetic (rather than natural) stimuli in which the physical variability within and between categories could be controlled, and (b) whether the younger infants' sensitivity to nonnative speech contrasts is best explained by reference to the phonetic relevance or the physical similarity of the stimuli. In addition to replicating the developmental reorganization, the results indicate that infant speech perception is phonetically relevant. We discuss the implications of these results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Phonetic coherence in duplex perception: Effects of acoustic differences and lexical status.

A modified version of duplex perception was used to investigate the nature of perceptual organization of speech. Ss were asked to identify stimuli in which a 3rd-formant transition was presented to one ear and a full syllable (base) was presented to the other ear. Phonetic integration occurred even when the spectral composition or onset frequency of the isolated transition was varied relative to the base. However, when onset asynchronies were added to spectral differences, the isolated transition ceased to contribute to the syllable percept. Lexical status of the eventual phonetic percepts also influenced the phonetic integration of acoustic components into syllable percepts. These results suggest that combinations of low-level acoustic and phonetic differences between components and higher level lexical information interact to influence the grouping of acoustic components into phonetic percepts. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Mood and context-dependence: Positive mood increases and negative mood decreases the effects of context on perception.

Five studies show that mood affects context-dependence, such that negative mood promotes attention to a salient target, whereas positive mood enhances attention to both target and context. Judgments of temperature (Study 1), weight (Study 2), and size (Studies 3 and 4) were more strongly affected by the context in a positive than in a negative mood. Moreover, these effects extend to the social domain: When perceiving a target person's emotions, happy people were more influenced by the context than were sad people (Study 5). Thus, positive mood enhanced, and negative mood reduced, the magnitude of perceptual context effects. The results suggest that this pattern is not easily explained in terms of effort or depth of processing differences. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Auditory processing and dyslexia: evidence for a specific speech processing deficit

Following transection of a peripheral nerve in mice, a newly synthesized neurotropic pyrimidine compound, MS-818 was administered intraperitoneally at a dose of 1 mg kg-1 b.wt. day-1. The film model experiments for analyzing the early growth of axonal regeneration suggested that MS-818 activated Schwann cells which migrate from the proximal stump, inducing axonal elongation in vivo.     

An audiovisual test of kinematic primitives for visual speech perception.

Isolated kinematic properties of visible speech can provide information for lip reading. Kinematic facial information is isolated by darkening an actor's face and attaching dots to various articulators so that only moving dots can be seen with no facial features present. To test the salience of these images, the authors conducted experiments to determine whether the images could visually influence the perception of discrepant auditory syllables. Results showed that these images can influence auditory speech independently of the participant's knowledge of the stimuli. In other experiments, single frozen frames of visible syllables were presented with discrepant auditory syllables to test the salience of static facial features. Although the influence of the kinematic stimuli was perceptual, any influence of the static featural stimuli was likely based on participant's misunderstanding or postperceptual response bias. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An interactive activation model of context effects in letter perception: I. An account of basic findings.

Describes a model in which perception results from excitatory and inhibitory interactions of detectors for visual features, letters, and words. A visual input excites detectors for visual features in the display and for letters consistent with the active features. Letter detectors in turn excite detectors for consistent words. It is suggested that active word detectors mutually inhibit each other and send feedback to the letter level, strengthening activation and hence perceptibility of their constituent letters. Computer simulation of the model exhibits the perceptual advantage for letters in words over unrelated contexts and is considered consistent with basic facts about word advantage. Most important, the model produces facilitation for letters in pronounceable pseudowords as well as words. Pseudowords activate detectors for words that are consistent with most active letters, and feedback from the activated words strengthens activations of the letters in the pseudoword. The model thus accounts for apparently rule-governed performance without any actual rules. (50 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pygmalion revisited: New evidence for student expectancy effects in the classroom.

We conducted a field experiment to test the idea that students' expectations regarding their teacher's competence would influence their classroom behavior and academic achievement. At the end of a 3-week teaching unit, students in two high school classes who had been given an initial positive expectancy about their teacher's ability and motivation engaged in more appropriate and less inappropriate nonverbal behavior and received significantly higher final grades on the unit than did their peers in two no-expectation control classes. We speculate about both the direct (student-mediated) and indirect (teacher-mediated) processes by which students' expectations came to affect their academic outcomes. We also discuss the importance of group-level expectancies and some ethical issues in student expectancy research. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Adult attachment styles: Their relations to family context and personality.

This study used a sample of 304 adults to examine mean differences in family climate and personality variables on the basis of individuals' attachment styles. Also examined was whether mean differences varied by age group. Findings showed significant main effects of attachment style, but no Attachment Style X Age Group interactions. Compared with adults with an insecure attachment style, persons with a secure attachment style described their family of origin and their current family more positively and scored higher on personality variables indicative of self-confidence, psychological well-being, and functioning in the social world. When the family climate and personality variables were included in a discriminant function analysis, 2 significant functions were obtained. The 1st function discriminated adults with a positive self-model from those with a negative self-model. The 2nd function contrasted participants with a positive other-model from those with a negative other-model. Thus, this study provided evidence in support of the self- and other-models as the fundamental dimensions of adults' attachment system. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Development of the perception of musical relations: Semitone and diatonic structure.

Examined the development of sensitivity to 2 musical relations significant in Western tonal music, the semitone and diatonic structure, in 2 experiments with 30 preschoolers (aged 4.2–5.9 yrs) and 40 infants (aged 9.1–11 mo). Ss were tested for their detection of a semitone change in any position of a 5-note melody. Two standard melodies were used, one composed of diatonic tones only and the other containing a nondiatonic tone. In Exp I, preschoolers were superior in detecting the semitone change in the diatonic context compared with the nondiatonic context. In Exp II, infants detected the semitone change in all positions, but their performance was not influenced by diatonic context. It is concluded that infants and children can discriminate a semitone in a musical context and that the priority of diatonic structure emerges by 4–6 yrs of age. (32 ref) (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Social perception and the motivational structure of interpersonal relations.

An extension of a previous research (see 28: 673). The introduction of another variable, viz., the knowledge of the result of cooperative or competitive ventures, affected the perception of the partner. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neurocognitive underpinnings of face perception: Further evidence of distinct person and group perception processes.

A model of social perception is presented and tested. The model is based on cognitive neuroscience models and proposes that the right cerebral hemisphere is more efficient at processing combinations of features whereas the left hemisphere is superior at identifying single features. These processes are hypothesized to produce person and group-based representations, respectively. Individuating or personalizing experience with an outgroup member was expected to facilitate the perception of the individuating features and inhibit the perception of the group features. In the presented study, participants were asked to learn about various ingroup and outgroup targets. Later, participants demonstrated that categorization response speeds to old targets were slower in the left hemisphere than in the right, particularly for outgroup members, as predicted. These findings are discussed for their relevance to models of social perception and stereotyping. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reading speech and hearing print: Constraining models of visual word recognition by exploring connections with speech perception.

Current models of reading and speech perception differ widely in their assumptions regarding the interaction of orthographic and phonological information during language perception. The present experiments examined this interaction through a 2-alternative, forced-choice paradigm, and explored the nature of the connections between graphemic and phonemic processing subsystems. Exps 1 and 2 demonstrated a facilitation-dominant influence (i.e., benefits exceed costs) of graphemic contexts on phoneme discrimination, which is interpreted as a sensitivity effect. Exps 3 and 4 demonstrated a symmetrical influence (i.e., benefits equal costs) of phonemic contexts on grapheme discrimination, which can be interpreted as either a bias effect, or an equally facilitative/inhibitory sensitivity effect. General implications for the functional architecture of language processing models are discussed, as well as specific implications for models of visual word recognition and speech perception. (PsycINFO Database Record (c) 2010 APA, all rights reserved)