Mapping from Sound to Meaning: Reduced Lexical Activation in Broca''s Aphasics

Recent studies of lexical access in Broca's aphasics suggest that lexical activation levels are reduced in these patients. The present study compared the performance of Broca's aphasics with that of normal subjects in an auditory semantic priming paradigm. Lexical decision times were measured in response to word targets preceded by an intact semantically related prime word ("cat"-"dog"), by a related prime in which one segment was acoustically altered to produce a poorer phonetic exemplar ("c*at"-"dog"), and by a semantically unrelated prime ("ring"-"dog"). The effects of the locus of the acoustic distortion within the prime word (initial or final position) and the presence of potential lexical competitors ("cat" --> /gaet/versus "coat" --> "goat") were examined. In normal subjects, the acoustic manipulations produce a small, short-lived reduction in semantic facilitation irrespective of the position of the distortion in the prime word or the presence of a voiced lexical competitor. In contrast, Broca's aphasics showed a large and lasting reduction in priming in response to word-initial acoustic distortions, but only a weak effect of word-final distortions on priming. In both phonetic positions, the effect of distortion was greater for prime words with a lexical competitor. These findings are compatible with the claim that Broca's aphasics have reduced lexical activation levels, which may result in a disruption of the bottom-up access of words on the basis of acoustic input as well as increased vulnerability to competition between acoustically similar lexical items.     

Amount of Learning and Signal Stability Modulate Emergence of Structure and Iconicity in Novel Signaling Systems

Iterated language learning experiments that explore the emergence of linguistic structure in the laboratory vary considerably in methodological implementation, limiting the generalizability of findings. Most studies also restrict themselves to exploring the emergence of combinatorial and compositional structure in isolation. Here, we use a novel signal space comprising binary auditory and visual sequences and manipulate the amount of learning and temporal stability of these signals. Participants had to learn signals for meanings differing in size, shape, and brightness; their productions in the test phase were transmitted to the next participant. Across transmission chains of 10 generations each, Experiment 1 varied how much learning of auditory signals took place, and Experiment 2 varied temporal stability of visual signals. We found that combinatorial structure emerged only for auditory signals, and iconicity emerged when the amount of learning was reduced, as an opportunity for rote-memorization hampers the exploration of the iconic affordances of the signal space. In addition, compositionality followed an inverted u-shaped trajectory raising across several generations before declining again toward the end of the transmission chains. This suggests that detection of systematic form-meaning linkages requires stable combinatorial units that can guide learners toward the structural properties of signals, but these combinatorial units had not yet emerged in these unfamiliar systems. Our findings underscore the importance of systematically manipulating training conditions and signal characteristics in iterated language learning experiments to study the interactions between the emergence of iconicity, combinatorial and compositional structure in novel signaling systems.     

The Balint group experience for medical students: a pilot project

Loss of empathy has been reported in medical students as they move through the clinical phases of their training. Several researchers have attempted to address this issue by exploring ways of heightening students’ awareness of the emotional, non-biomedical aspects of illness and the dynamics of the doctor–patient relationship, using a variety of reflective group discussion methods. This pilot project employed the specific group method developed by Michael Balint for general practitioners working in London after the Second World War. The pilot was based on one group of six third-year graduate students, meeting weekly over six weeks. Evaluation includes pre- and post-questionnaires, a 1000-word essay and leaders’ observations. The results suggest that the traditional Balint method needs to be modified for students at a point in their training where they have not yet been exposed to patients for long enough to develop meaningful patient relationships. Nevertheless, there was some evidence of a heightened awareness of the dynamics of doctor–patient relationships and the importance of psychological/emotional factors (including their own prejudices) when interacting with a patient. Balint-style groups could be an effective way of encouraging medical students to reflect on the importance of emotions in the doctor–patient relationship.     

Indigenous Psychotherapies and Religion: Moral Vision and Embodied Communities

Over the past century, the dominant model for addressing mental illness has been the treatment of individuals, largely by individual therapists who assume the availability of individual psychological resources. That form of therapy is a scarce commodity in capitalist societies, and social models of healing have been largely marginalized and forgotten. From the point of view of an indigenous psychology of religion, this essay (1) reports on local cultural and community models of healing that honor the common good, draw on local, communal narratives, and involve a given community in the process of healing. However, because it is not simply community in itself that is therapeutic, the authors argue (2) that healing cultures have communities that are guided by their moral vision and are committed to justice, moral integrity, and the sharing of resources. They draw on intergenerational studies that detail the effects in Inuit communities where a moral vision and a sense of community was present but then was eroded. Therapists whose interventions draw on the moral resources of the community may facilitate healing, as demonstrated by the use of allocentric imaging in more communal traditions. Finally, it is not simply communities with moral ideals that are therapeutic but (3) indigenous communities whose structures and whose role models embody their ethic that is critical for healing. The authors examine ecological communities in China committed to Confucian values and protection of the earth. The L’Arche communities begun in France by Jean Vanier and Alcoholics Anonymous groups around the world serve as examples of embodied moral communities.     

Statistical analysis of binary relational data: Parameter estimation

Binary interaction data, measuring the presence or absence of a relation between pairs of actors in a “dyadic interaction situation,” are commonly gathered to study the social structure of the group of actors. Recent developments have made the statistical analysis of such data statistically easier and more substantively sophisticated. These developments allow researchers to simultaneously study several sociometric structural properties, such as reciprocity, differential popularity, and equivalence of actors. Building on this research, we review the stochastic models responsible for this breakthrough, and discuss methods for estimating expected values and model parameters. Throughout, we also highlight recent advances designed to incorporate nodal or actor attribute data into the relational data analysis. We conclude with an example illustrating these ideas based on conversational activities among actors in a group of eight people.     

Ideas of influence: counsellors' talk about influencing clients

The influence the counsellor has on his or her clients is problematic both theoretically and practically. This article explores how counsellors in six focus groups talked about counsellor influence in response to a series of scenarios and questions. The counsellors adopted three main, or 'core', positions about influence: 'counsellors shouldn't influence'; 'influence is inevitable'; and 'counselling is influence'. These were linked by various 'bridging arguments' through which the research participants made sense of the contradictions between the core positions. The rhetorical use of these bridging arguments highlights some significant paradoxes within counselling around power, influence and direction.     

On the nature of the foreign accent syndrome: A case study

A detailed acoustic analysis was conducted of the speech production of a single patient presenting with the foreign accent syndrome subsequent to a left-hemisphere stroke in the subcortical white matter of the pre-rolandic and post-rolandic gyri at the level of the body of the lateral ventricle. It was the object of this research to determine those changes which contribute to the perception of a "foreign accent." A number of acoustic parameters were investigated, including features of consonant production relating to voice, place, and manner of articulation, vowel production relating to vowel quality and duration, and speech melody relating to fundamental frequency. The results indicated that many attributes which might have contributed to the foreign quality of the patient's speech were similar to those of normal English speakers. However, a number of critical elements involving consonant and vowel production and intonation were impaired. It was hypothesized that the acoustically anomalous features are linked to a common underlying deficit relating to speech prosody. It is suggested that the normal listener categorizes this speech pattern as a foreign accent because the anomalous speech characteristics, while not a part of the English phonetic inventory, reflect stereotypical features which are a part of the universal phonetic properties found in natural language.