Explanation-Based Learning (EBL) fails to accelerate problem solving in some problem spaces. How do these problem spaces differ from the ones in Minton’s experiments [1988b]? Can minute modifications to problem space encoding drastically alter EBL’s performance? Will PRODIGY/EBL'S success scale to real-world domains? This paper presents a formal theory of problem space structure that answers th...

In this paper we describe the design and implementation of the derivation replay framework, dersnlp+ebl (Derivational snlp+ebl), which is based within a partial order planner. dersnlp+ebl replays previous plan derivations by first repeating its earlier decisions in the context of the new problem situation, then extending the replayed path to obtain a complete solution for the new problem. When ...

Although P revious research has demonstrated that EBL is a viab e approach for acquiring search control knowledge, in practice the control knowledge learned via EBL may not be useful. To be useful, the cumulative benefits of applying the knowled a cumulative costs of testing whet e must outweigh the a licable. er the knowledge is d? Unlike most ODIGY/EBL system eva uates the costs and benefits ...

The School of Nursing at the University of KwaZulu-Natal has recently introduced the concept of nursing diagnosis within the Bachelor of Nursing Problem Based Learning (PBL) acute care nursing course. A descriptive survey was designed to evaluate a teaching strategy the researchers developed for Year III Bachelor of Nursing students in an acute care clinical practice course. All students in Yea...

Klegeris et al. (2013) are to be congratulated for adding another important piece to our knowledge of how problembased learning (PBL) can be implemented. As the debate about PBL is less about whether it works and more about what forms of it work, studies such as this will become more important. However, the authors miss one vital outcome measure of the research—that of cost. One of the major cr...

Problem-based learning (PBL) has wide currency on many college and university campuses, including our own, the University of Delaware. Although we would like to be able to claim clear evidence for PBL in terms of student learning outcomes, based on our review of the literature, we cannot state that research strongly favors a PBL approach, at least not if the primary evidence is subject matter l...