In one of the first papers about the complexity of puzzles, Robertson and Munro [12] proved that a generalized form of the thenpopular Instant Insanity puzzle is NP-complete. Here we study several variations of this puzzle, exploring how the complexity depends on the piece shapes and the allowable orientations of those shapes. Prepared in honor of Ian Munro’s 66th birthday.

Fritz Heider was a wanderer, someone who liked to survey and take the measure of whatever he encountered. In his formative years, he was a wanderer in the geographical sense — hiking in his beloved Austrian mountains and traveling throughout much of Europe. In his professional years, he was a wanderer in the intellectual sense — taking daily walks for the purpose of analyzing a difficult concep...

In developing European standards for the psychological profession, two main approaches to the definition of professional competence have been proposed. One focuses on the roles and functions psychologists should be able to perform (output model), the other on the educational curricula that should be followed in order to become a psychologist (input model). This article starts with a discussion ...

I am always attempting to develop new and better ways to teach beginning teachers “all there is to know” about child development and special education. Over the years this process has lead me to feel more and more disillusioned. I am convinced that we need a total revamp of how we approach teaching educational psychology and propose that our discipline re-define what is considered to be essenti...

tions–treatments,” is there a misnomer? American Psychologist, 64, 275–276. Silverstein, L. B., & Auerbach, C. F. (2009). Using qualitative research to develop culturally competent evidence-based practice. American Psychologist, 64, 274–275. Tryon, W. W. (2009). Missing mechanism information. American Psychologist, 64, 273–274. Wolpe, J. (1958). Psychotherapy by reciprocal inhibition. Stanford,...

In this paper we describe the revision and extension processes performed to the “subontology” for Units of Measure of the Merged ontology proposed by Ian Niles. We have used a principled approach to guide revision of knowledge. The methodology and the sets of criteria that were used in this revision are described.