Enzymes are nature's catalysts, mediating chemical processes in living systems. The study of enzyme function and mechanism includes defining the maximum catalytic rate and affinity for substrate/s (among other factors), referred to as enzyme kinetics. Enzyme kinetics is a staple of biochemistry curricula and other disciplines, from molecular and…

Describes origin, development, and current state of Research Libraries Information Network's (RLIN) Command Analysis System, which digests large quantities of raw data on RLIN use and performance and produces useful graphs and reports. Recent results of system and pragmatic issues in analysis of online systems are noted. (7 references) (EJS)

Sixty-one examiners provided a rating of whether a significant change in performance of handicapped individuals occurred across the baseline and treatment phases of six graphs of hypothetical data from single-subject designs. Results revealed considerable interrater disagreement on four graphs, especially those involving change in variability or…

The technique developed in this research paper for analyzing the information in charts and graphs is designed to reveal design flaws in the display that may prevent them from conveying information effectively. This analytic scheme requires isolating four types of constituents in a display and specifying their structure and interrelations at the…

Fifty-six teachers of students with moderate/profound disabilities viewed task analytic data in one of three forms: graphed, ungraphed, or both. The data's form did not produce different teacher judgments of student progress or different program recommendations. Three factors (trend, variability, and frequency of data collection) had significant…

A subset of Statistical Process Control (SPC) methodology known as Control Charting is introduced. SPC methodology is a collection of graphical and inferential statistics techniques used to study the progress of phenomena over time. The types of control charts covered are the null X (mean), R (Range), X (individual observations), MR (moving…

Description of study to determine the impact of management training on student performance focuses on the need for proper evaluation. Pre- and posttraining evaluative tools for rating managers are described, differences in ratings are analyzed, and implications for evaluating management training on interpersonal skills are discussed. (LRW)

The agreement between visual analysis and the results of the split-middle method of trend estimation was examined using a set of 24 stimulus graphs and 30 raters. Results revealed poor agreement between the two methods, and low sensitivity, specificity, and predictive ability for visual analysis in relation to statistical inferences. (JDD)

This study introduced a probabilistic model utilizing item response theory (IRT) for dealing with a variety of misconceptions. The model can be used for evaluating the transition behavior of error types, advancement of learning stages, or the stability and persistence of particular misconceptions. Moreover, it apparently can be used for relating…

Reports results of unobtrusive testing of reference service (asking reference questions of library staff who are unaware of being evaluated) in government documents and central reference areas of 26 U.S. libraries. Accuracy of answers, interview and search process duration, referral, and use of catalog and technology are highlighted. (12…

This paper reports on applications of quality tools, developed for industrial settings, to educational management and instruction at three technical education centers. The necessary data were collected by the centers as they prepared for registration to the International Standards Organization Quality Assurance Standards. Application was made of…

This investigation evaluated performance of university students on visual and nonvisual versions of an achievement test. Two experimental designs assessed the effects and interactions between visual and nonvisual instructional modes, order of drawing test (before or after verbal/visual achievement test), and mode of drawing test (verbal cued or…

This critique discusses conceptual and practical issues raised in a paper by D. Marston (EC 210 837) on choosing the most technically adequate graph for measuring progress on individual education plans. The critique argues that the Standard Behavior Chart is a technically adequate and useful measurement tool. (JDD)

This article responds to a criticism (EC 231 964) of a paper that discusses graphs for measuring progress on individual education plans (EC 210 837). It notes that the type of chart used is not a major issue; the important point is that teachers repeatedly gather data on educationally relevant tasks and evaluate intervention effectiveness. (JDD)