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Manipulating Critical Variables: A Framework for Improving the Impact of Computers in the School Environment.

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Collis, Betty – 1988

Previous work assessing the effectiveness of computers in education has gone no further than acknowledging a network of interconnected variables (comprising a system) which contribute to computer impact and describing its component parts. An impact systems model developed by Glasman and Bibiaminov (1981) has been adapted to facilitate measurement…

Descriptors: Computer Assisted Instruction, Educational Planning, Input Output Analysis, Instructional Effectiveness

Evaluation of the MEDLARS Demand Search Service.

Lancaster, F.W. – 1968

A detailed analysis was made by the National Library of Medicine of the performance of the Medical Literature and Analysis System (MEDLARS) in relation to 300 actual "demand search" requests made to the systems in 1966 and 1967. The objectives of the study were : (1) to study the demand search requirements of MEDLARS users, (2) to…

Descriptors: Coordinate Indexes, Evaluation, Indexing, Information Processing