Whereas middle-aged individuals tended to group the entire stimulus array into piles of similar items, the elderly individuals grouped very much as young children do--arranging only a portion of the stimulus array into elaborate designs. (Authors)

Study concerned with the effects of procedural differences on the classification of geometrical stimuli. (Author)

The development of multiplicative classificatory skills in children between 4 and 9 years of age was investigated by means of two forms of the matrix-completion task. (Authors)

Describes methods for effecting the partition of information systems consisting of many components and interconnections into subsystems which are later made to interface with one another achieving an overall system. Clustering algorithms for the specific case of information systems are obtained and exemplified. Twenty-seven references are…

Presents a key for the identification of 21 species of birds at Black Hill Conservation Park in Australia. Example on how to use this key is also presented. (HM)

Argues that the account of coordination of unlike categories ought to be unified with the account of feature neutralization under phonological identity. Further argues that this unified account ought not be couched in terms of string of features, but rather in terms of the logic of categories. Study concludes with a discussion of the interactions…

Discusses the lack of classification systems as a major deficiency in the field of comparative education. Examines previous typologies of education systems and of forms of intergroup relations. Offers a tentative classification of 135 national education systems based on 15 conventional indicators using factor analysis and cluster analysis.…

This study sought to identify clusters or subtypes of children with learning disabilities (LD, n=24) and brain damage (BD, n=36) using a neuropsychological battery. Five clusters were determined, but no one cluster was composed exclusively of LD or BD subjects. Significant qualitative and quantitative differences between clusters were found.…

Describes a study in which comprehensive bibliographies and related literatures were compared by clustering indices, Bradford multipliers, bibliograph slopes, and reference scattering coefficients. It is concluded that the clustering index has the potential for being a useful tool in comparing the intensity of clustering of different literatures.…

When performing a classification study, it is often useful to leave a residue of unclassified entities to be analyzed separately. Using an interactional paradigm, theoretical reasoning for this approach is outlined. A procedure--RESIDAN--for conducting a classification analysis using a residue is described, and empirical data are provided. (TJH)

A Monte Carlo study evaluated the effectiveness of three rules of classifying objects into clusters: nearest neighbor classification; nearest centroid assignment; and quadratic discriminant analysis. Results suggest that the nearest neighbor rule is a useful tool for assessing the validity of the clustering procedure of J. H. Ward (1963). (SLD)