Describes features of Bliss Bibliographic Classification (BC2) that make it thesaurus-compatible and a source for thesaurus compilers: facet analysis, terminology source, thesaural relationship source, and updating ease. Problems with using BC2 as a thesaurus source are also considered, and two thesauri based on BC2 are described. (MBR)

Three studies examined preschool children's understanding of categorical hierarchies, testing their ability to form categories at different levels of generality and to include the same objects in multiple categories. Found that, contrary to the implications of previous studies, two- and three-year olds appear to have both categorization skills.…

Ordering principles, hierarchy, taxonomy, emergence, and decomposable systems are discussed. Examples of hierarchies are included. (CW)

During socialization, individuals begin to understand increasingly broader and more abstract units of personal and social reality. Subjects (N=97) ranging in age from 13 to late middle age completed a linguistic task in which they could impose higher order conceptions on lower order descriptions by identifying different level similarities within…

This research project attempted to (1) identify leader types from teacher descriptions of the leadership behaviors of elementary school principals and (2) study the effects of the leadership types on the organizational behavior of teachers. Teacher responses from 99 Iowa elementary schools revealed three basic principal leadership types. Using…