Evaluation research is conceived as a question answering process. Four strategies are suggested which emerged from four approaches to the study of questions. Evaluation questions must be identified and classified before research can effectively begin. This paper discusses the four approaches to studying evaluation research questions and their…

Models of similarity have traditionally assumed that the similarity relation is symmetrical. However, when reversed, similarity statements frequently have different properties from those of the original. Previous attempts to account for the asymmetry of similarity have focused only on literal comparisons, resulting in a tendency to underestimate…

A precise formulation of both cognitive structure and its related theory is provided through use of the mathematical theory of categories. Weaknesses and imprecision in cognitive theory are identified. Using category theory, cognitive structure and related Piagetian theoretic terms are precisely defined and some interrelationships are discussed.…

Attempts to analyze the realities of current practice in spatial arrangement of ordinary infants' schools and to discuss some aspects of their boundary maintenance. Based on observations made and conversations and interviews conducted in 27 schools in four outer London boroughs. (Author/EA)

Presents a core typology of organizational environments consisting of 64 types which can be expanded depending on the user's interest and problems. Different types of environments have consequences for the planning of strategies, operations, and tactics; coalition behavior; and decisionmaking. (Author)

Among the many types of models developed over recent years in educational planning, some have been restricted to a single institution while others have formed relationships between entire educational systems and the economy at large, but very few have given results helpful to an educational planner. (Author/KM)

The author reviews the major classifications of social class, assesses their validity, surveys the use made of them in research literature, suggests how they should be interpreted, and assesses to what degree findings couched in these terms correspond to the reality of social differences in Britain. (Author)

Presents an analysis of scientific theory which is applicable to the full range of historical situations. Indicates that theory can be resolved into three generalization levels, one neutral element, and two modes. Included are examples illustrating the constituency of the three levels in two modes. (CC)

Holland's hexagonal model for six occupational groups was tested with data on estimated occupational rewards. Data on rated occupational reward characteristics were available for 148 occupations. Although the hexagonal shape was distorted, the groups were arrayed in the order postualted by Holland. (Author)

Responded to is an article by Michael Herrick suggesting that disadvantaged children be provided with special educational services offered learning disabled children. (DB)

Responded to is an article by Michael Herrick suggesting that disadvantaged children be provided with special educational services offered learning disabled child. (DB)

This paper analyzes: (1) the bibliographic access to publications in urban studies via printed secondary sources; (2) development and scope of classification systems and of vocabulary control for urban studies; and (3) currently accessible automated collections of bibliographic citations. Urban studies is defined as "an agglomeration of…

Clustering techniques seek to group together objects or variables that share some observed qualities or, alternatively, to partition a set of objects or variables into mutually exclusive classes whose boundaries reflect differences in the observed qualities of their members. This paper reviews the general principles underlying clustering…