Intermodal perception of expressive behaviors: Relation of eye and voice?

Examined intermodal perception of vocal and facial expressions in 2 experiments with 16 5- and 16 7-mo-olds. Two filmed facial expressions were presented with a single vocal expression characteristic of 1 of the facial expressions (angry or happy). The lower third of each face was obscured, so Ss could not simply match lip movements to the voice. Overall findings indicate that only 7-mo-olds increased their fixation to a facial expression when it was sound-specified. Older infants evidently detected information that was invariant across the presentations of a single affective expression, despite degradation of temporal synchrony information. The 5-mo-olds' failure to look differentially is explained by the possibilities that (1) 5-mo-olds may need to see the whole face for any discrimination of expressions to occur; (2) they cannot discriminate films of happy and angry facial expressions even with the full face available; or (3) they rely heavily on temporal information for the discrimination of facial expressions and/or the intermodal perception of bimodally presented expressions, although not for articulatory patterns. Preferences for a particular expression were not found: Infants did not look longer at the happy or the angry facial expression, independent of the sound manipulation, suggesting that preferences for happy expressions found in prior studies may rest on attention to the "toothy" smile. (25 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Meaning dimensions and male-female voice perception in schizophrenics with good and poor premorbid adjustment.

This study explored certain aspects of perceptual distortion in schizophrenia. Among schizophrenics with a good premorbid adjustment, schizophrenics with a poor premorbid adjustment, and normals, auditory perception of spoken material was compared as a function of (a) sex of voice and (b) dimensions of meaning. The Ss listened to successive presentations of a recorded spoken word, mixed with decreasing amounts of masking noise, until their recognition threshold were established. Schizophrenics with poor premorbid adjustment responding to the female voice had significantly higher thresholds than those responding to the male voice. This finding did not occur in schizophrenics with good premorbid adjustment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The chameleon effect: The perception–behavior link and social interaction.

The chameleon effect refers to nonconscious mimicry of the postures, mannerisms, facial expressions, and other behaviors of one's interaction partners, such that one's behavior passively and unintentionally changes to match that of others in one's current social environment. The authors suggest that the mechanism involved is the perception–behavior link, the recently documented finding (e.g., J. A. Bargh, M. Chen, & L Burrows, 1996) that the mere perception of another's behavior automatically increases the likelihood of engaging in that behavior oneself. Experiment 1 showed that the motor behavior of participants unintentionally matched that of strangers with whom they worked on a task. Experiment 2 had confederates mimic the posture and movements of participants and showed that mimicry facilitates the smoothness of interactions and increases liking between interaction partners. Experiment 3 showed that dispositionally empathic individuals exhibit the chameleon effect to a greater extent than do other people. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A direct link between gaze perception and social attention.

How information is exchanged between the cognitive mechanisms responsible for gaze perception and social attention is unclear. These systems could be independent; the “gaze cueing” effect could emerge from the activation of a general-purpose attentional mechanism that is ignorant of the social nature of the gaze cue. Alternatively, orienting to social gaze direction might be directly determined by the operation of cognitive mechanisms specifically dedicated to gaze perception. This second notion is the dominant assumption in the literature, but there is little direct support for this account. Here, we systematically manipulated observers' perception of gaze direction by implementing a gaze adaptation paradigm. Gaze cueing was reduced only in conditions where perception of specific averted gaze stimuli was impaired (Experiment 1). Adaptation to a pointing stimulus failed to impact gaze cueing (Experiment 2). Overall, these data suggest a direct link between the specific operation of gaze perception mechanisms and the consequential orienting of attention. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

整流变压器联接组别的优化选择谐波分析

热连轧机主传动交交变频同步电机调速系统,其供电电网侧的无功功率和谐波比较大。整流变压器联接组别不同,热连轧系统供电电网侧总谐波电流大小就不同,选择一组合适的变压器联接,可以使系统网侧谐波大大减小。本文针对整流变压器联接组别的优化选择问题进行研究,分析了各种运行工况下,联接组别的优化方法以及相应系统网侧的谐波数值。最后,针对攀钢热连轧精轧机主传动系统,给出变压器联接组别的设计方案。     

Olfactory perception and olfactory imagery: A multidimensional analysis.

Whether a system of imagery for olfaction exists is currently an unsettled issue. Moreover, the dimensions underlying odor perception have eluded researchers for many years. Two experiments bearing on these issues are presented. In 1 experiment, a group of 32 undergraduates rated the similarity of pairs of 16 commonplace odorants (e.g., chocolate and leather) they perceived using scratch and sniff stimuli; in another, a different group of 44 undergraduates was asked to imagine and then rate the similarity of the same pairs of odors. Multidimensional scaling of the data suggests that 3-dimensional solutions with similar stimulus dimensions, such as fruitiness, strength, and familiarity, underlied the ratings of both perceived and imagined odors. By finding that similar dimensions define the psychological space of both the imagery and the perception tasks, this study suggests that imagery does indeed exist for olfaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Auditory and linguistic factors in the perception of voice offset time as a cue for preaspiration

Previous research [J. Pind, Acta Psychol. 89, 53-81 (1995)] has shown that preaspiration in Icelandic, an [h]-like sound inserted between a vowel and the following closure, can be cued by Voice Offset Time (VOffT), a speech cue which is the mirror image of Voice Onset Time (VOT). Research has also revealed that VOffT is much more sensitive to the duration of the neighboring vowel than is VOT [J. Pind, Q. J. Exp. Psychol. 49A, 745-764 (1996)]. This paper explores the hypothesis that it is primarily the perceived quantity of the vowel that is responsible for the effect of the vowel on the perception of preaspiration. This hypothesis is based on the linguistic fact that preaspiration can only follow a phonemically short vowel. This linguistic hypothesis is contrasted with an auditory hypothesis in terms of forward masking. Perceptual experiments show that the perceptual boundaries for preaspiration can be affected either by changing the preceding vowel's duration or its spectrum. If the spectrum of the vowel changes towards that of a long vowel, longer VOffT's are needed for listeners to perceive preaspiration, thus lending support to the linguistic hypothesis.     

Learning voice analysis using an interactive multi-media package: development and preliminary evaluation

An important outcome of education for speech-language pathology practice is the ability to analyze voices perceptually, a complex task that is often difficult for novices. This article describes an interactive multi-media package, "A Sound Judgement," that is designed to help students develop skills in perceptual voice analysis and to link their perceptions to laryngeal physiology. The package presents a range of clients with vocal impairments at increasing levels of complexity. Each case has a videoed interview, endoscopic views and animations of the larynx, and case history information. Students make perceptual ratings of clients' voices on a format designed specifically for this package and feedback is provided using ratings made by expert speech-language pathologists. High levels of consensus for the perceptual judgments were achieved among the expert raters. Preliminary evaluations by students have demonstrated that "A Sound Judgement" is likely to be a valuable educational tool.     

Children's spatial analysis of hierarchical patterns: Construction and perception.

Two experiments were reported that aimed at investigating the development of spatial analysis of hierarchical patterns in children between 3 and 9 years of age. A total of 108 children participated in the drawing experiment, and 224 children were tested in a force-choice similarity judgment task. In both tasks, participants were exposed to consistent and inconsistent targets for short (300-ms) and long (3-s) durations. The drawing task showed that 3-year-old children either preferred to draw the local level or reproduced both levels in a nonintegrated manner. Coordination between the 2 processes started to emerge at 4 years of age, and 6-year-old children produced essentially correct integrated responses. The similarity judgment task confirmed that local processing dominated at 3 years of age. Preference for global processing appeared at 5 years of age, and it gained in strength later. Significant effects of stimulus consistency and stimulus duration were also found. In particular, the use of inconsistent patterns in the similarity judgment task revealed a phenomenon of local-to-global interference in the 3-year-olds. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Indicators of perception: I. Subliminal perception, subception, unconscious perception: An analysis in terms of psychophysical indicator methodology.

"A review of the literature pertaining to unconscious processes in perception was undertaken since preceding reviews had not taken into account current developments in psychophysical indicator methodology, which, it was felt, might clarify issues in this area, especially since they concern the two types of indicators most widely used. It is concluded that most of the substantive contributions of the experiments reviewed cannot be demonstrated to be related to perceptual variables, and this is probably where their importance lies." 198 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Bodyfat analysis and perception of body image

Obesity is a common nutritional problem among children. Using the Futrex 5000A method of bodyfat measurement, this prospective study determined the percentage bodyfat in a self-selected, indigent, predominantly black population and the accuracy of perceived body image. Bodyfat exceeded the optimal range in 39% and 67% of female and male children, respectively. Females tended to view themselves as fatter and males perceived themselves as thinner than their actual composition. Parents were more accurate in their perception of obesity in their daughters (88%) than in their sons (52%). Children did not recognize the importance of exercise in preventing obesity. Bodyfat measurement and counseling should be done at an early age to improve this remarkable lack of perception about obesity.     

Acoustic voice analysis. On documentation of voice rehabilitation after laser surgery laryngeal carcinoma resection

Following curative minimal-invasive laser resection of T1-T3 laryngeal carcinomas, patients were subjected to an intensive voice rehabilitation. Therapy was effected twice a day for approximately 2 months, utilizing the concept of functional voice therapy. Before and after rehabilitation, acoustic analyses were made by using two different computer-supported measuring systems: (1) the "multidimensional voice program" (Kay Elementrics Corp.) and (2) a novel software program developed in G?ttingen that includes a new voice quality parameter based on correlations between frequency bands. Acoustic analyses showed superiority of the glottal versus supraglottal compensatory phonation. Findings showed that not all acoustic parameters equally documented voice improvement after rehabilitation. The standard deviation of fundamental frequency was the only parameter showing a significant post-therapeutic improvement. A further suitable acoustic method proved to be the voice quality parameter that has been newly introduced by us. In contrast to analogous parameters of other methods, this approach is independent of the exact periodicity of the glottal excitation function, thus permitting reliable results to be obtained even with aphonic or heavily dysphonic voices.     

Comparison of voice analysis systems for perturbation measurement

Dysphonic voices are often analyzed using automated voice analysis software. However, the reliability of acoustic measures obtained from these programs remains unknown, particularly when they are applied to pathological voices. This study compared perturbation measures from CSpeech, Computerized Speech Laboratory, SoundScope, and a hand marking voice analysis system. Sustained vowels from 29 male and 21 female speakers with mild to severe dysphonia were digitized, and fundamental frequency (F0), jitter, shimmer, and harmonics- or signal-to-noise ratios were computed. Commercially available acoustical analysis programs agreed well, but not perfectly, in their measures of F0. Measures of perturbation in the various analysis packages use different algorithms, provide results in different units, and often yield values for voices that violate the assumption of quasi-periodicity. As a result, poor rank order correlations between programs using similar measures of perturbation were noted. Because measures of aperiodicity apparently cannot be reliably applied to voices that are even mildly aperiodic, we question their utility in quantifying vocal quality, especially in pathological voices.     

Volatile flavour of wine: correlation between instrumental analysis and sensory perception

The aroma of wine consists of 600 to 800 aroma compounds from which especially those, typical for the variety, are already present in the grapes. There are significant varietal differences between the aromagrams ('fingerprint patterns'). Thus the amount of some flavour compounds ('key substances') shows typical dependence on the variety. Especially monoterpene compounds play an important role in the differentiation of wine varieties. The German white wines can be differentiated into three groups only by quantitative determination of 12 monoterpenes ('terpene profile'). These groups are: 'Riesling type', 'Muscat type' and 'Silvaner-Weissburgunder type'. Such 'terpene profiles' are also useful for the separation of real Riesling wines from others called Riesling (e.g. Welschriesling, Kap Riesling, Emerald Riesling) but not produced from grapes of the variety Riesling. Including further components and by means of statistical methods (discriminant analysis) even the different varieties within the mentioned groups for instance the 'Riesling'-group (e.g. Riesling, Kerner, Ehrenfelser, Bacchus, Müller-Thurgau) can be separated from each other. An analytical characterization of the neutral ('Silvaner-type') grape varieties Silvaner, Rul?nder (Pinot gris), Weissburgunder (Pinot blanc) is also possible with about 20 compounds (e.g. monoterpenes, alcohols). Computing at the same time free and glycosidically bound aroma components (monoterpenes, alcohols, norisoprenes) in discriminant analysis the characterization of the neutral grape varieties can be considerably improved. To identify compounds causing 'off-flavours' sniffing technique is the method of choice. The off-flavour is pinpointed during gas chromatographic separation of the complex aroma mixture by effluent sniffing. Once allocated, the chemical nature of the off-flavours is elucidated by spectroscopic methods. Substances contributing to the green pepper taint, the strawberry note, moussiness, corkiness, etc. in wine could be found in this way.     

Accuracy in interpersonal perception: A social relations analysis.

For the past 30 years, the study of accuracy in person perception has been a neglected topic in social and personality psychology. Research in this area was stopped by a critique of global accuracy scores by Cronbach and Gage. They argued that accuracy should be measured in terms of components. Currently, interest in the topic of accuracy is rekindling. This interest is motivated, in part, by a reaction to the bias literature. We argue that modern accuracy research should (a) focus on measuring when and how people are accurate and not on who is accurate, (b) use each person as both judge and target, and (c) partition accuracy into components. The social relations model (Kenny & La Voie, 1984) can be used as a paradigm to meet these requirements. According to this model, there are four types of accuracy, only two of which are generally conceptually interesting. The first, called individual accuracy, measures the degree to which people's judgments of an individual correspond to how that individual tends to behave across interaction partners. The second, called dyadic accuracy, measures the degree to which people can uniquely judge how a specific individual will behave with them. We present an example that shows high levels of individual accuracy and lower levels of dyadic accuracy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Speaking up in groups: A cross-level study of group voice climate and voice.

Despite a growing body of research on employee voice—defined as the discretionary communication of ideas, suggestions, or opinions intended to improve organizational or unit functioning—the effects of shared or collective-level cognitions have received scant attention. There has also been relatively little research on voice within work groups. Our goal in this study was to address these important gaps by focusing on the effects of group-level beliefs about voice (i.e., group voice climate) on individual voice behavior within work groups. We conducted a cross-level investigation of voice behavior within 42 groups of engineers from a large chemical company. Consistent with our hypotheses, group voice climate was highly predictive of voice and explained variance beyond the effects of individual-level identification and satisfaction, and procedural justice climate. Also consistent with predictions, the effect of identification on voice was stronger in groups with favorable voice climates. These findings provide evidence that voice is shaped not just by individual attitudes and perceptions of the work context, as past research has shown, but also by group-level beliefs. The results also highlight the importance of broadening our conceptual models of voice to include shared cognitions and of conducting additional cross-level research on voice. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Agreement and accuracy in children's interpersonal perception: A social relations analysis.

Agreement and accuracy in children's interpersonal perceptions during middle childhood were studied in the school environment. Sociocultural and ecological theories led to the prediction that, in middle childhood, peers' interpersonal perceptions would show high levels of agreement with those of teachers and would be accurate. A social relations analysis of data from a 3-year, cross-sequential study revealed that throughout middle childhood, peer perceptions of cognitive ability, observable behavior and characteristics, popularity, and affect correlated reliably with teacher perceptions. In addition, peer and teacher perceptions of targets' cognitive ability correlated with standardized test scores. Self-other agreement lagged behind teacher-peer agreement. The conceptual and statistical advantages of the social relations analysis of children's interpersonal perceptions were also considered. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Interpersonal perception in group therapy: A social relations analysis.

Although group therapists have emphasized the importance of interpersonal perception and feedback during therapy, there has been little systematic research on how group members form impressions of one another. D. J. Kiesler's (see record 1983-30243-001) interpersonal circle provided a framework for studying interpersonal perception and relations. 27 women and 18 men from 9 time-limited therapy groups reported their impressions of their fellow group members using the Impact Message Inventory, and they also completed 2 self-report scales. A social relations analysis of this data indicated that Ss' perceptions included both assimilation and consensus. There was also a relationship between how Ss saw themselves before therapy and how they were seen by other group members. The results demonstrated the utility of the social relations model for group therapy research and provided modest support for Kiesler's interpersonal circle. (PsycINFO Database Record (c) 2010 APA, all rights reserved)