Discusses the relative operating characteristic analysis of signal detection theory as a measure of diagnostic accuracy. Reports representative values of this measure in several fields. Compares how problems in these fields are handled. (CW)

Discusses developments in electrochemical instrumentation, including the role of computers, measurement/control instruments, present needs and future prospects. Indicates that microprocessors are used primarily for data processing, and that progress depends on noninstrumental factors such as electrode materials. (Author/JN)

Describes recent developments in instrumentation for clinical chemistry in the areas of general chemistry, immunoassays, urinalysis, electrophoresis, chromatography, and trace metal analyses. (CS)

Instructional videocassettes can provide efficient learning about analytical instrument maintenance and usage for scientists and technicians. Advantages of this approach include low cost to consumers, step-by-step instructions, and quality control of training. The programs currently available from three companies selling gas chromatographs and…