A rapid sequencing method for ribosomal RNA was applied to the resolution of evolutionary relationships among Metazoa. Describes the four groups (chordates, echinoderms, arthropods, and eucoelomate protostomes) that radiated from the coelomates. (TW)

This analysis of the U.S. Department of Labor's "Dictionary of Occupational Titles" as a literary and cultural document, looks at its (1) history; (2) job classification scheme; (3) egalitarianism; (4) cultural and literary value; and (5) humor. Five references are listed. (MES)

Describes the five major principles of fiction classification laid out by early theorists and discusses studies that measure patron reactions to fiction classification schemes. Areas for further research are suggested, and 15 references are listed.(MES)

Argues that the concepts "career" and "dual-career marriage" are loosely defined in the literature, hindering the comparability of findings and accumulation of scientific knowledge. Supports this assertion with a review of recent articles. Finds sociological and psychological levels of analysis not clearly differentiated, with researchers assuming…

This article reviews the history, the use and the reasons for abandonment of the selective adaptation paradigm. The four experiments mentioned in the article show that selective adaptation produces strong reaction time effects, and that items in the adapted category are identified more slowly than unadapted items. (JAZ)

Proposes scientific theory of the subject matter of library and information science and how it can be organized in terms of the function of documents and their basic use. A hierarchy of classes of documents is described including one, several, or all of the following: information, creativity, understanding, and explanation. (Author/EM)

A total of 61 children from first through sixth grades participated in four balance-scale and four inclined-plane problem types in a study testing for invariance of subject classifications as rule-users across problems whose products differed but whose type did not. Results indicated that many children's classifications differed across…

Although various methods are used to study solution chemistry, relationships between them are generally not self-evident, and the theory and procedure underlying each technique are frequently learned and memorized separately. Therefore, all of these methods are classified within a unified framework that clearly demonstrates relationships and…

Responds to W. Frawley's and J. Lantolf's comments on the Frauenglass and Diaz study concerning the interaction between private speech and cognition. Argues that Vygotsky's theory predicts a positive effect on children's problem solving activity. (HOD)

Response latencies of 27 learning disabled (LD) and 27 normal control boys (8-11 years old) were compared on a picture-word interference task. Both LD and control Ss exhibited greater interference effects (longer response latencies) when naming pictures (versus naming words) and when categorizing words (versus categorizing pictures). (Author/CL)

Organizational theorists have been constrained by the overuse of dichotomies. Complex social phenomena cannot adequately be represented through these simplifications of reality. This propensity of theorists to dichotomize is investigated and countered by the advocacy of disciplined naivete in the study of educational organizations. (MLF)

Two experiments tested the hypothesis that scripts (event schemas) provide a basis for categorical structures in semantic memory. Significantly better memory and organization were achieved on slot-filler lists than on either taxonomic or complementary lists, suggesting that slot-filler categories are more available in preschoolers' semantic…

The article provides a rationale for the merger of special and regular education into one unified system structured to meet the unique needs of all students. Two major premises (lack of need and inefficiency of operating a dual system) are discussed, and some possible implications of merger are considered. (Author/CL)

Presents a general definition of a system; outlines a collection of properties identified through a review of the literature to be used as a criterion for determining whether an aggregation of objects is a system; and tests a computer-based system against the checklist to see how it measures up. (MBR)

By studying examples of their applications by two major English language bibliographic agencies, this article compares strengths and weaknesses of PRECIS and Library of Congress Subject Headings for books about music. Highlights include quantitative and qualitative analysis, comparison of number of subject statements, and terminology problems in…