Understanding behavioural clusters: Identifying differences between clusters of health behaviours on key constructs

Objective: To uncover the rationale underlying the perceived distinction between clusters of health behaviours by identifying cognitive constructs that differentiate among them, and creating a ‘cognitive profile’ for each behavioural cluster. Thus, different determinants and characteristics of health behaviours (e.g. ‘perceived behavioural control’, ‘impact on health’, ‘effort’, ‘non-health rewards’, ‘habit’) were used to compare health behaviour meta-clusters (physical and psychosocial) and clusters (e.g. nutrition behaviours, substance abuse, medical practices).

Methods: A sample of lay people (N = 1956) judged items representing behavioural clusters delineated in the Health Behaviour Taxonomy on 14 constructs.

Results: Significant differences emerged between the physical and psychosocial meta-clusters, as well as among their sub-clusters. For example, physical behaviours were higher on ‘perceived behavioural control’ and ‘impact on health’ compared to psychosocial behaviours, and nutrition was perceived highest on ‘effort’ and ‘non-health rewards’ compared to the other clusters of the physical meta-cluster.

Conclusion: The findings increase our understanding of the logic underlying lay people’s cognitive schema of health behaviour clusters. ‘Cognitive profiles’ that explain differences between the clusters were identified, which can be used to design health messages and interventions targeting multiple health behaviours.     

Lay Definitions of Violence among Swedish Children,Teenagers, and Adults

Definitions of violence vary and are almost always operationalized by the researcher. Perceptions of violence often determine levels of tolerance of violence. Little research has focused on lay definitions. A total of 309 Swedes (78 children, 85 teenagers, 99 younger adults, and 47 adults (30+); 48% male) were interviewed using a specially developed interview protocol. Content analysis was used to assign definitional categories. A folk taxonomy emerged. Immediate physical violence accounted for 73% of all assigned categories. Hit was the word that occurred most frequently. If global physical violence was included, physical violence accounted for 89% of 780 assigned categories. Immediate non-physical violence accounted for 9% and vicarious violence (including media violence) accounted for 2%. Distributions of categories by respondents' gender, age, and participant role in incidents of violence showed the underlying definitions of violence to be extremely stable. The conclusion is that ordinary Swedes share a robust lay definition of violence as a behavior that is immediate, done in close quarters, and physical.     

我国中学语文和历史教学目标分类取向的研究

本研究采用文献研究法,查阅了2000年以来中学语文和历史教案共303篇,对教案中教学目标的相关信息作点计数据处理,并进行卡方检验,结果表明:⒈近几年来我国中学语文和历史教学绝大多数采用布卢姆的教育目标分类取向;⒉两者的教学目标侧重于认知领域;⒊两者在认知和情感领域的目标要求学生达到的水平偏低,在动作技能领域的目标要求学生达到的水平偏高;⒋中学历史教学目标中对动作技能领域的理解有偏差;⒌两者在认知和情感领域的教学目标陈述时用词单一或含糊,而动作技能领域教学目标的陈述较清晰。研究结果提示,提高广大一线教师有关教学目标的分类理论及科学地运用教学目标的陈述技术仍有很长的路要走。     

Relevance of Context-bound loci to Topical Potential in the Argumentation Stage

In relation to the task of making an expedient selection from the available loci within the topical potential that strategic manoeuvring envisages for the argumentation stage, this paper proposes a version of topics, which is both inspired to the traditional doctrine of topics and consistent with the theoretical framing and the methodological tenets that are proper of modern semantics and current theory of argumentation. The argumentative relevance of communication context in its institutionalised and interpersonal components is brought to light. Three main aspects are focussed on: the strong synergy of the topical and the endoxical components in argument construction, the use of topics in analysis and evaluation of arguments and the heuristic function of topics in the production process. I express to Peter Houtlosser, Corina Andone, Sara Greco Morasso and Andrea Rocci my profound gratitude for their precious suggestions and cordial criticisms.     

Differential ordering of objects and attributes

By reference to nominated attributes, a genus, being a population of objects of one specified kind, may be partitioned into species, being subpopulations of different kinds. A prototype is an object representative of its species within the genus. Using this framework, the paper describes how objects can be relatively differentiated with respect to attributes, and how attributes can be relatively differentiating with respect to objects. Methods and rationale for such differential ordering of objects and attributes are presented by example, formal development, and application.For a genus comprisingn species of object there is a subsetP ofn distinct prototypes. With respect tom nominated attributes, each object in has anm-element characterization. Together these determine ann ×m objects × attributes matrix, the rows of which are the characterizations of the prototypical objects. Over then species in , an associated relative frequency vector gives the distribution of objects (and of their characterizations). The matrix and vector associate the objects in with points in a metric space (P, ); and it is with respect to various sums of distances in this attribute space that one can differentially order objects and attributes.The definition of the distance function is generalized across kinds of difference, types of characterization, scale-types of measurement, Minkowskiindex 1, and any form of distribution of objects over species. Explanatory and taxonomic applications in psychology and other fields are discussed, with focus on classification, identification, recognition, and search. The Braille code and the identification of its characters provide illustration.An anticipation and some preliminary indications were given in Sutcliffe and Bristow (1966), Sutcliffe (1972, 1973), and Nowakowska (1975). Subsequently the ideas have been extended and their applications realized in a computer program which, in its development, has so far gone through many minor and three major revisions to its present form in Sutcliffe (1985). The foregoing provided the foundation for the empirical applications and for the presentation in this paper of the ideas in their general form. the research has been supported by funds from the University of Sydney Research Grant and from the Australian Research Grants Scheme. In the working out and exposition of the ideas I have very much benefited from constructive critical comment given by C. R. Latimer, J. B. Michell, G. Oliphant, and E. Seneta, and from the professional programming skills of Michael Wilson and David Shillito. I am grateful for the invitation and the facilities for writing extended during 1983 by Georges Noizet, Laboratoire de Psychologie Expérimentale, Université René Descartes, Paris V, and by Samuel Messick, Vice President for Research, E.T.S. Princeton, N.J. Finally, I acknowledge the improvements in presentation of this paper which have arisen from the editor's and reviewers' comments.     

An examination of procedures for determining the number of clusters in a data set

A Monte Carlo evaluation of 30 procedures for determining the number of clusters was conducted on artificial data sets which contained either 2, 3, 4, or 5 distinct nonoverlapping clusters. To provide a variety of clustering solutions, the data sets were analyzed by four hierarchical clustering methods. External criterion measures indicated excellent recovery of the true cluster structure by the methods at the correct hierarchy level. Thus, the clustering present in the data was quite strong. The simulation results for the stopping rules revealed a wide range in their ability to determine the correct number of clusters in the data. Several procedures worked fairly well, whereas others performed rather poorly. Thus, the latter group of rules would appear to have little validity, particularly for data sets containing distinct clusters. Applied researchers are urged to select one or more of the better criteria. However, users are cautioned that the performance of some of the criteria may be data dependent.The authors would like to express their appreciation to a number of individuals who provided assistance during the conduct of this research. Those who deserve recognition include Roger Blashfield, John Crawford, John Gower, James Lingoes, Wansoo Rhee, F. James Rohlf, Warren Sarle, and Tom Soon.     

A monte carlo study of thirty internal criterion measures for cluster analysis

A Monte Carlo evaluation of thirty internal criterion measures for cluster analysis was conducted. Artificial data sets were constructed with clusters which exhibited the properties of internal cohesion and external isolation. The data sets were analyzed by four hierarchical clustering methods. The resulting values of the internal criteria were compared with two external criterion indices which determined the degree of recovery of correct cluster structure by the algorithms. The results indicated that a subset of internal criterion measures could be identified which appear to be valid indices of correct cluster recovery. Indices from this subset could form the basis of a permutation test for the existence of cluster structure or a clustering algorithm.     

Sequential validation of cluster analytic subtypes of homeless veterans

To identify subgroups within the homeless population, a number of researchers have employed cluster analytic statistical procedures. Although this is an appropriate application of cluster analysis, many studies have not employed important statistical safeguards against arbitrary results. This study demonstrates a cluster analytic procedure—sequential validation—that enhances the replicability, external validity, and cross-validity of cluster solutions. The procedure is applied to a nationwide sample of 745 homeless veterans. After 12 different clustering procedures were subjected to derivation, replication, external validation, and cross-validation phases, a 4-cluster Ward solution emerged as the most sound. Substantively, the clusters were an alcoholic subtype, a psychiatrically impaired subtype, a best functioning subtype, and a multiproblem subtype. The generalizability of these subgroups to other contexts was assessed by comparing them to subgroups identified in other homelessness research. Suggestions were made for improving the quality of cluster analytic research in community psychology.     

Anti-Autonomism Defended: A Reply to Hill

In the current issue of this journal, Scott Hill critiques some of my work on the “is”-“ought” controversy, the Hume-inspired debate over whether an ethical conclusion can be soundly, or even validly, derived from only non-ethical premises. I’ve argued that it can be; Hill is unconvinced. I reply to Hill’s critique, focusing on four key questions to which he and I give different answers.

Taxonomy of Spiritual Experiences

Spiritual experiences are often associated with health crises, with little information about the structure of the experience. A taxonomic analysis was conducted on data from a group of healers, unveiling a structural model of spiritual experience comprised of three domains: circumstances, manifestation and interpretation. Circumstances included the aspects of setting, situation, and timing. Manifestation incorporated the modes of awareness and the phenomena of the experience. Components of interpretation included personal meaning and congruence with social norms. The examples reflected the orientation of the study population. Further research could examine the applicability of the taxonomy to other religious or spiritual orientations and may assist in clinical assessment of spiritual experiences.Diane Wind Wardell, Ph.D., R.N.C., H.N.C., C.H.T.P./I., and Joan C. Engebretson, Dr.P.H., R.N., H.N.C., are Associate Professors in the School of Nursing at the University of Texas Health Science Center at Houston. Correspondence to Diane Wind Wardell, Diane.Wardell@uth.tmc.edu.