Effects such as student dropout and the non-normal distribution of duration data confound the exploration of tutor efficiency, time-intutor vs. tutor performance, in intelligent tutors. We use an accelerated failure time (AFT) model to analyze the effects of using automatically generated hints in Deep Thought, a propositional logic tutor. AFT is a branch of survival analysis, a statistical tech...

Editor’s note: This editorial is part of a series written by editors and co-authored with a senior executive, thought leader, or scholar to explore new content areas and grand challenges with the goal of expanding the scope, interestingness, and relevance of the work presented in the Academy of Management Journal. The principle is to use the editorial notes as “stage setters” to open up fresh, ...

conclusions unless there are well-thought out strategies for minimizing the undesirable impact on the environment, it is not advisable that such projects be permitted. results the results showed that the negative environmental and social impacts of the project outweighed the positive impacts in terms of type, number, and intensity. materials and methods a checklist containing the positive, nega...

Results of a study from Mississippi State University, working with the parents of more than 16,000 kids reveals big news. The study on self-control compared the scores of children exhibiting poor or unhappy behavior and how well they respected and worked with peers, to parents’ statements on how frequently they attended worship, talked with their children about religion, and argued about religi...

completion, and when the project is complete it should comprise nineteen volumes in all. This volume is an edition of Arnald's Tractatus de consideracionibus operis medicine siveflebotomia. It contains a detailed introductory essay (in Spanish) by Pedro Gil-Sotres together with the text of Arnald's treatise on phlebotomy edited by Luke Demaitre. The volume is complete with bibliography and indi...

I’m often asked “What is the difference between a pattern and a framework?” According to the dictionary definition of a pattern, there isn’t much difference. The World Book Dictionary gives eleven noun definitions for pattern, including “a model or a guide for something to be made”, which certainly matches a framework. But even a macro or a C++ template is a pattern according to that definition...

Components of animal welfare are generally accepted to include maintenance of good health, minimization of negative states such as pain and enhancement of positive states such as comfort and psychological well-being, and freedom to exhibit behaviors that are natural to the species (Fraser, 2009). In the case of laboratory animals, the first of these is ensured through appropriate veterinary car...

How should we best analyse the meaning of proper names, indexicals, demonstratives, both simple and complex, and definite descriptions? In what relation do such expressions stand to the objects they designate? In what relation do they stand to mental representations of those objects? Do these expressions form a semantic class, or must we distinguish between those that arc referential and those ...