An alternative account of the locus equation phenomenon based on recent theories of speech movement planning is provided. It is similar to Sussman et al.'s account in positing that our productions are tuned to satisfy auditory constraints. It differs by suggesting that the locus equation effect may be an epiphenomenon of a planning process that satisfies simpler auditory constraints.

This commentary focuses on the importance of auditory object processing for producing and comprehending human language, the relative lack of development of this capability in nonhuman primates, and the consequent need for hominid neurobiological evolution to enhance this capability in making the transition from protosign to protospeech to language.

BackgroundReflexive pitch perturbation experiments are commonly used to investigate the neural mechanisms underlying vocal motor control. In these experiments, the fundamental frequency–the acoustic correlate of pitch–of a speech signal is shifted unexpectedly and played back to the speaker via headphones in near real-time. In response to the shift, speakers increase or decrease their fundamental frequency in the direction opposing the shift so that their perceived pitch is closer to what they intended. The goal of the current work is to develop (...) a quantitative model of responses to reflexive perturbations that can be interpreted in terms of the physiological mechanisms underlying the response and that captures both group-mean data and individual subject responses.MethodsA model framework was established that allowed the specification of several models based on Proportional-Integral-Derivative and State-Space/Directions Into Velocities of Articulators (DIVA) model classes. The performance of 19 models was compared in fitting experimental data from two published studies. The models were evaluated in terms of their ability to capture both population-level responses and individual differences in sensorimotor control processes.ResultsA three-parameter DIVA model performed best when fitting group-mean data from both studies; this model is equivalent to a single-rate state-space model and a first-order low pass filter model. The same model also provided stable estimates of parameters across samples from individual subject data and performed among the best models to differentiate between subjects. The three parameters correspond to gains in the auditory feedback controller’s response to a perceived error, the delay of this response, and the gain of the somatosensory feedback controller’s “resistance” to this correction. Excellent fits were also obtained from a four-parameter model with an additional auditory velocity error term; this model was better able to capture multi-component reflexive responses seen in some individual subjects.ConclusionOur results demonstrate the stereotyped nature of an individual’s responses to pitch perturbations. Further, we identified a model that captures population responses to pitch perturbations and characterizes individual differences in a stable manner with parameters that relate to underlying motor control capabilities. Future work will evaluate the model in characterizing responses from individuals with communication disorders. (shrink)

D. M. GABBAY and F. GUENTHER, Handbook of philosophical logic, 2nd edn, vol. 9. Dordrecht, Boston, London: Kluwer, 2002. xiv + 368 pp. €129.00, US$112.00, £79.00. ISBN1 402 00699 3. The philo...

King, C. R. Touching the earth. --Tracol, H. Thus spake Beelzebub. --Nicoll, M. On the formation of a psychological body. --Fullerson, M. C. Discovery of intimate order. --Halevi, Z. ben S. Order. --Dürckheim, K. G. von. On the double origin of man. --Guenther, H. V. Towards spiritual order. --Eracle, J. The Buddhist way to deliverance. --Blofeld, J. Return to the source. --Werner, K. Spiritual personality and its formation according to Indian tradition.

On Islamic practices, doctrines and on Islamic ethics.

My object in this paper is to suggest a few reflections on some themes in Bentham's work which others as well as I have noted, without perhaps developing them as fully as might with advantage be done. There will be nothing like full development in the limited compass of what is said here, but what is said may at least indicate possible directions for further exploration. The greater part of the paper will be concerned with the notion of natural authority; (...) but I want to begin by taking a broader, though no doubt rather superficial, view of the role in Bentham's thinking of the concepts of ‘nature’ and ‘the natural’. (shrink)

The object of this article is to examine, with the work of Jeremy Bentham as the principal example, one strand in the complex pattern of European social theory during the second half of the eighteenth century. This was of course the period not only of the American and French revolutions, but of the culmination of the movements of thought constituting what we know as the Enlightenment. Like all great historical episodes, the Enlightenment was both the fulfilment of long-established processes and (...) the inauguration of new processes of which the fulfilment lay in the future. Thus the seminal ideas of seventeenth-century rationalism realized and perhaps exhausted their potentialities in the eighteenth-century Enlightenment. The ideas with which this article is concerned, however—conveniently grouped and labelled as the ideas of utilitarianism—only began to achieve systematic development in these later decades of the eighteenth century. Within that period—during the first half and more of Bentham's long life—attempts to apply those ideas to the solution of social problems met largely with failure and frustration. Yet unrealized potentialities remained, the realization of which was reserved for a time when the world of the philosophes no longer existed. The movements for social and political reform which have played so large a part in modern history since the French Revolution may be judged in widely differing ways; but whatever the verdict, these movements surely cannot be understood without due consideration of that part of their origins which lies in eighteenth-century utilitarianism. (shrink)

Collection of author's lectures on Sufism and Islamic philosophy.

في كتابه "العلمانية من سالب الدين إلى موجب الدولة: راهنية مشروع بشارة عربيًا"، الصادر عن المركز العربي للأبحاث ودراسة السياسات، يشتغل سهيل الحبيّب على فرضية أن كتاب عزمي بشارة، الدين والعلمانية في سياق تاريخي، هو إضافة نوعية على المستويين المعرفي والنظري إلى ما هو سائد في السياق الفكري والأيديولوجي العربي المعاصر والراهن من فهمٍ نظري للعلمانية، ومن تمثّل تاريخي لظواهرها. ويحاول الاستدلال على صحة هذه الفرضية بتحديد الوجوه المتعيّنة للإضافات المعرفية والنظرية التي يحويها كتاب بشارة، من حيث هو جهد يتتبّع (...) ظواهر التديّن والتَّعَلْمُن على مدار قرون عديدة وفي سياقات عديدة من التاريخ الغربي الحديث والمعاصر والراهن، للوصول إلى الفهم التاريخي لظاهرتَي الدين والعلمانية. (shrink)

Islamic education; Muslims; conduct of life.