Who's Afraid of Ceteris-Paribus Laws? Or: How I Learned to Stop Worrying and Love Them

Ceteris-paribus clauses are nothing to worry about; aceteris-paribus qualifier is not poisonously indeterminate in meaning. Ceteris-paribus laws teach us that a law need not be associated straightforwardly with a regularity in the manner demanded by regularity analyses of law and analyses of laws as relations among universals. This lesson enables us to understand the sense in which the laws of nature would have been no different under various counterfactual suppositions — a feature even of those laws that involve no ceteris-paribus qualification and are actually associated with exceptionless regularities. Ceteris-paribus generalizations of an‘inexact science’ qualify as laws of that science in virtue of their distinctive relation to counterfactuals: they form a set that is stable for the purposes of that field. (Though an accident may possess tremendous resilience under counterfactual suppositions, the laws are sharply distinguished from the accidents in that the laws are collectively as resilient as they could logically possibly be.) The stability of an inexact science's laws may involve their remaining reliable even under certain counterfactual suppositions violating fundamental laws of physics. The ceteris-paribus laws of an inexact science may thus possess a kind of necessity lacking in the fundamental laws of physics. A nomological explanation supplied by an inexact science would then be irreducible to an explanation of the same phenomenon at the level of fundamental physics. Island biogeography is used to illustrate how a special science could be autonomous in this manner. This revised version was published online in July 2006 with corrections to the Cover Date.     

Impairment of temporal organization of speech in basal ganglia diseases.

Absolute and relative speech timing were examined in patients suffering from Parkinson's, Huntington's, and Wilson's disease. The task was to speak a standard sentence 10 times, first slowly, and then successively faster up to maximum rate. All patient groups had low maximal speech rates and showed decreased variability of speech rate. The duration of pauses between words was the same as in normals and the relative time structure of the test sentence was basically preserved. For comparison, two cases with nonfluent aphasia had even slower speech rates, large increases in pause duration, and major changes in relative speech timing. The results show the same type of alterations of the temporal organization of speech as those characteristic for rapid alternating limb movements in such patients. They support the view that the speech and skeletomotor systems share common neural control modes despite fundamental biomechanical differences. The common denominator between the speech and the skeletomotor disturbances in basal ganglia diseases may be the undamping and slowing of a fast central oscillator.     

Patterns of reflex action,their autonomic components,and their behavioral significance

This is a discussion of the evidence that autonomic system reflexes are invariably triggered by stimuli that evoke both simple and complex somatic reflexes. Stimuli not only initiate reverberatory activity but sequences of reinforcements from higher centers. Reflexes come in chains, one reaction triggering another. Reflex actions are patterned, and these patterns are appropriate to the behavioral requirement indicated by stimuli. Reciprocal action produces a powerful braking or stimulatory action. Coactivation or synergic action of autonomie “antagonists” also occurs and can effect a greater cardiac output in certain vascular reflexes than can sympathetic action alone. Coactivation of vagus and sympathetic fibers occuring in reflex action or resulting from stimulation of specific areas in the hypothalamus has a physiologic importance to attainment of maximal cardiac function. Finally, two additional suggestions are made: (1) that the rhythmic reflex feedback discharge of the vagus from the baroreceptors aids in maintaining the regularity of cardiac rhythm as by interaaction of oscillators and (2) that the autonomic system, due to its early and often conditioned response, can be determinative as well as modulatory and supportive of behavior.     

Spouse involvement in the treatment of obsessive-compulsive patients

Twelve married obsessive-compulsive patients were randomly allocated to either selfcontrolled exposure or partner-assisted exposure. Treatment in both conditions consisted of homepactice.The results at the Post-test showed that both versions of exposure in vivo resulted in significant improvements but the partner-assisted group improved more. After a 1-month treatment-free period no significant differences between conditions were found due to a continuing improvement in the selfcontrolled exposure condition. Results were maintained at a 6-month follow-up.It was concluded that home-practice is a cost-effective treatment procedure for obsessive-compulsives and that couple training may be useful with selected patients.     

The measurement of cognitive impulsiveness: Psychometric properties of two automated adult versions of the Matching Familiar Figures Test

An automated version of the Matching Familiar Figures Test (MFFT) was administered to undergraduates, along with a parallel from. The latency-errors correlation (–0.61) was higher than that reported for most studies in children and weakly supports the view that the correlation increases with age. Repeated exposure resulted in improved performance, which was faster, more accurate, and more efficient, but there was no effect on impulsiveness. Reliability and internal consistency of both forms were acceptably high and the forms were comparable. Use of the univariate measures (impulsiveness-reflectiveness and efficiency-inefficiency) is superior to other scoring methods.Supported in part by a grant from the Nuffield Foundation, England.     

Arson and (para-) suicide

There have been forensic-psychiatric observations from 1963 to 1983 concerning the offenders responsibility in case of deliberate arson with 12 out of 147 suits being closely related to (para-)suicide. According the variety of relations we distinguish between fire as pure means of suicide, fire used to take along the living space or people, suicide committed in consequence of arson, furthermore arson as a symbolic suicide, and finally acting alternately with both arson as well as parasuicide.