The watershed years of 1958-1962 in the Harvard Pigeon Lab

During the years 1958-1962, the final years of support by the National Science Foundation for B. F. Skinner's Pigeon Lab in Memorial Hall at Harvard University, 20 or so pigeon experiments (plus some with other organisms) ran concurrently 7 days a week. The research style emphasized experimental analyses, exploratory procedures, and the parametric exploration of variables. This reminiscence describes some features of the laboratory, the context within which it operated, and the activities of some of those who participated in it.     

B. F. Skinner: The Writer and His Definition of Verbal Behavior

Skinner's definition of verbal behavior, with its brief and refined versions, has recently become a point of controversy among behavior analysts. Some of the arguments presented in this controversy might be based on a misreading of Skinner's (1957a) writings. An examination of Skinner's correspondence with editors of scientific journals shows his sophisticated mastery of English and his knowledge of contemporary approaches of linguistics, and might help to settle the meaning of the passages involved in the controversy. A more precise definition of verbal behavior, deduced from Skinner's distinction between verbal and nonverbal operants, is suggested, and a possible reason why Skinner did not define verbal behavior in the terms proposed by this alternative definition is discussed. The alternative definition is more compatible with a functional approach to behavior and highlights what is specific to verbal behavior by pointing to the conventions of the verbal community. Some possible consequences of adopting this alternative definition are described.     

WHAT CAN PIAGET OFFER LONERGAN'S PHILOSOPHY OF BIOLOGY?

In Insight, Bernard Lonergan provides, albeit schematically, a unique philosophy of biology which he takes as having “profound differences” with the world view presented by Darwin. These turn on Lonergan's idea of “schemes of recurrence” and of organisms as “solutions to the problem of living in an environment.” His lapidary prose requires some deciphering. I present the broad lines of his philosophy of biology and argue that Jean Piaget's structuralism can shed light on Lonergan's intentions in virtue of his use of cybernetics and the isomorphism between biology and knowledge. In turn, Piaget draws on Waddington's restatement of epigenesis and I suggest that the result, “process structuralism,” is a viable alternative to the modern Darwinian synthesis.     

Herder's ‘Expressivist’ Metaphysics and the Origins of German Idealism

Charles Taylor's influential exposition of Hegel made the doctrine of expressivism of central importance and identified Herder as its exemplary historical advocate. The breadth and generality of Taylor's use of ‘expressivism’ have led the concept into some disrepute, but a more precise formulation of the doctrine as a theory of meaning can both demonstrate what is worthwhile and accurate in Taylor's account, and allow us a useful point of entry into Herder's multifaceted philosophy. A reconstruction of Herder's overall philosophical position, centred around a refined theory of what this paper labels ‘Herderean expressivism’, reveals a naturalistic, teleological metaphysics. This metaphysics fulfils the Hegelian aim of providing what Dieter Henrich has called a ‘feedback loop’ between ontology and epistemology. Exploring Herder's expressivism, therefore, helps further the case for his decisive impact on Hegel's philosophy. Herder's methodological naturalism, however, represents an obstacle to Hegel's absolute idealism.     

Science and Human Behavior at fifty

The golden anniversary of Science and Human Behavior is cause for celebration. Toward that end, the present paper is largely an historical consideration of the book, its inception and reception, both at the time of its publication and in subsequent years. The range and intensity of reactions to S&HB mark its impact and show it to be among Skinner's most important works, if not the most important. S&HB was written as an introductory psychology text--a vigorous use of the book in our teaching could do much to benefit the dissemination of behavior analysis.     

Pauses and syntax in American sign language

Research on spoken languages has shown that the durations of silent pauses in a sentence are strongly related to the syntactic structure of the sentence. A similar analysis of the pauses (holds) in a passage in American Sign Language reveals that sequences of signs are also interspersed with holds of different lengths: long holds appear to indicate the ends of sentences; shorter holds, the break between two conjoined sentences; and the shortest holds, breaks between internal constituents. Thus, pausal analysis is a guide to parsing sentences in ASL.     

Crossed aphasia in an illiterate dextral

An 83 year old illiterate, right-handed woman developed a persistent nonfluent aphasia following a right cerebral infarction (crossed aphasia). Computerized axial tomography localized the lesion to the right posterior frontal lobe.It is suggested that the neural mechanisms involved in learning to read and write may be critical for the complete establishment and maintenance of language dominance in the left hemisphere, and that, in this case, the patient's failure to acquire reading and writing skills altered the normal evolution of language lateralization and resulted in the right hemisphere assuming the dominant role.     

Measuring the importance of information in judgment: Individual differences in weighting ability and effort

Measuring the importance of cues in social judgment has been a longstanding problem. Past research has shown individual differences in the impact of ability and study effort on judgments of student performance. This research examined the hypothesis that the individual differences are due to the weight given to the information as opposed to the perceived extremity of the values of the information. Subjects judged the performance of hypothetical students described by ability, study effort, and effort during an exam. Individual differences in the impact of the three types of information were obtained and were predictable from self-reports of the relative importance of information. Different values of weights were necessary to account for the differences in the impact of information, although there were also differences in the perceived extremity of the information. The theoretical and applied significance of distinguishing the weight given to information in judgment from its subjective value are discussed. On the basis of a new review of the literature, as well as the present results, it is concluded that self-reports of the relative importance of information are predictive of individual differences in information use in judgment, but that they may reflect the total impact of information rather than only the weight.