Results demonstrate that the relationship between the structure of positive and negative instances within a learning series is also critical to concept learning when the concepts are presented in a nondimensioned way. (Authors/CB)

Results indicated that negative instances were an integral part of concept acquisiton. The relationship between the positive and negative instances was based upon similarity of irrelevant attributes and sentence difficulty. (Author)

The Technical Information Service of the National Research Council of Canada and several other information retrieval activities in Ottawa and elsewhere are components of a nation-wide network which is developing into a coherent Canadian Scientific and Technological Information Dissemination System. (21 references) (Author/NH)

The University of Georgia Information Dissemination Center is profiled. Emphasis is on the organization and services of the system which primarily serves 27 state supported schools in Georgia. Based on a recent survey, the impact of the service on the users is discussed. (DH)

Experiments reported here confirm the finding that performance can actually improve as intradimensional variability increases. (Authors/MB)

Data suggest that young children can rapidly learn to classify transformations correctly that do and do not affect liquid quantity. (Authors)

The library problem consists of equal parts of external and internal noise. The external noise consists of the volume of publication. The internal noise can be characterized by the present and continuing brouhaha concerning reform of library education. Scientists frankly regard librarians as impediments to information. (Author/NH)

Purpose of the present study was to test for both forward and backward effects of inserted questions, and to determine the conditions under which each is most effective. (Authors)

Research supported in part by a Public Health Service Grant to the New School of Social Research and a National Science Foundation Grant to Stanford University. (VM)

The TSS (Topological Screens System) for substructure search was applied to the CAS Registry file making it searchable on-line. The TSS screens and the use of the screen indexes are described. Statistics on screen assignment are provided, and the strengths and weaknesses of the system are discussed. (Author/NH)

The Director of the ERIC Clearinghouse on Media and Technology attempts an objective consideration of just how useful today's system is to individuals seeking information on educational technology." (Author/AK)

"The purpose of this paper is to bring to computer professionals a realistic view of what a large library is and what the jobs and costs are which a librarian must worry about. Written by the director of libraries at MIT. (Author/LS)