A study of the classification capabilities of neural networks using unsupervised learning: A comparison withK-means clustering

Several neural networks have been proposed in the general literature for pattern recognition and clustering, but little empirical comparison with traditional methods has been done. The results reported here compare neural networks using Kohonen learning with a traditional clustering method (K-means) in an experimental design using simulated data with known cluster solutions. Two types of neural networks were examined, both of which used unsupervised learning to perform the clustering. One used Kohonen learning with a conscience and the other used Kohonen learning without a conscience mechanism. The performance of these nets was examined with respect to changes in the number of attributes, the number of clusters, and the amount of error in the data. Generally, theK-means procedure had fewer points misclassified while the classification accuracy of neural networks worsened as the number of clusters in the data increased from two to five.Acknowledgements: Sara Dickson, Vidya Nair, and Beth Means assisted with the neural network analyses.     

Is medicine hermeneutics all the way down?

Several recent publications have suggested that hermeneutics, the method of literary criticism, might prove to be useful in medicine. In this essay I consider this thesis with particular attention to the claim that medicine is hermeneutics all the way down. After examining an anti-positivist critique of positivist medicine and arguing that hermeneutic interpretation involves a more radical critique of modern medicine, I examine the supposed consequences of hermeneutical universalism:relativism, skepticism andantirealism which further evaluation reveals to be only potential consequences of hermeneutics. A brief discussion ofphronesis and of the possible texts of medicine concludes the article.     

An examination of gender differences for job satisfaction,mental health,and occupational stress among senior U. K. civil servants

This study found that gender differences exist within senior U.K. civil servants. Females within the civil service were significantly more job dissatisfied, and suffered from poorer mental and physical ill health. They also showed more concern about their role at work, the factors associated with their particular job, the job's relationship to the home environment, and the constraints of the job. Males were more affected by how much control they felt they had at work, and by their hard-driving and achievement oriented behavior.     

A BRIEF COMPONENT ANALYSIS OF POTENTIAL TREATMENT PACKAGES IN AN OUTPATIENT CLINIC SETTING WITH YOUNG CHILDREN

The purpose of this study was to develop outpatient clinic assessments that allowed us to assess multiple treatment variables, produce relatively quick effects, and isolate active treatment components. Assessment began by evaluating a treatment package consisting of antecedent and consequence variables followed by a component analysis to determine the separate effects of the treatment variables. Three examples of the findings are presented.     

Ogden R. Lindsley and the historical development of precision teaching

This paper presents the historical developments of precision teaching, a technological offshoot of radical behaviorism and free-operant conditioning. The sequence progresses from the scientific precursors of precision teaching and the beginnings of precision teaching to principal developments since 1965. Information about the persons, events, and accomplishments presented in this chronology was compiled in several ways. Journals, books, and conference presentations provided the essential information. The most important source for this account was Ogden Lindsley himself, because Lindsley and his students established the basic practices that define precision teaching.     

A COMPONENT ANALYSIS OF FUNCTIONAL COMMUNICATION TRAINING ACROSS THREE TOPOGRAPHIES OF SEVERE BEHAVIOR PROBLEMS

We evaluated the separate treatment components of a functional communication training program for 3 severely handicapped persons who each displayed different topographies of aberrant behavior. Following a functional analysis of maintaining conditions for inappropriate behavior (self-injury, stereotypy, aggression), each participant was trained to emit a communicative response that functioned to solicit reinforcement. For 2 participants, consequences (time-out or graduated guidance) for inappropriate behavior were also included. Treatment continued until the participants emitted the communicative response independently and no occurrences of inappropriate behavior were observed for at least two sessions. Following treatment, the separate contributions of the treatment components for communicative responding and for inappropriate behavior were evaluated with a reversal design. The results indicated that both sets of treatment components were necessary for maximal control over aberrant behavior. These results are discussed in relation to the efficiency, history, and control over reinforcement of both appropriate and inappropriate responses.     

Graphic comparisons of interobserver agreement indices

How changes in the interobserver agreement and disagreement cells in the reliability matrix are reflected differently in eight commonly used reliability indices is shown graphically. Indices which take into account expected chance difference are compared to those indices which do not. Differences between indices which do and do not treat the agreement and the disagreement cells equally are also illustrated.     

Keeping a group psychotherapy program alive and well within a psychiatric residency

A mandatory year of outpatient group therapy training is an accepted part of residency training in psychiatry. Residents need stable groups to lead in order to have a satisfactory training experience. A solid group program is integrated and cohesive. A group therapy coordinator has to consider the following factors in developing and maintaining the optimum program: sanction from the department of psychiatry; integration of the program into the system; transfer of groups from one class to another; personal screening and followup of all referrals; availability to professionals in the community; coordinator participation in relevant group therapy classes; a vehicle for supervisors to collaborate with each other and administrator; and a format for all members of the group program community to interact.This paper is an elaboration of a symposium presentation, Training in Group Psychotherapy: The Quest for a Viable Model, AGPA Annual meeting, 1990.     

Organizational Socialization: A Field Study into Socialization Success and Rate

The last decade has witnessed a resurgence of organizational socialization research. However, a critical question has been neglected: Is there a common underlying pattern to organizational socialization? We investigated newcomer learning, job satisfaction and intent to quit as common indicators of socialization, in research with 222 newcomers at two organizations during the crucial post‐entry period. The results support a learning‐dependent model of newcomer adjustment, with learning in specific domains related to improved attitudinal outcomes. Some aspects of organizational socialization were not uniform across the two organizations, suggesting a need for further development of socialization models and greater accounting for this in organizational socialization research.