Some random observations

Conclusion Of course, the rationale of PME is so different from what has been taught in orthodox statistics courses for fifty years, that it causes conceptual hangups for many with conventional training. But beginning students have no difficulty with it, for it is just a mathematical model of the natural, common sense way in which anybody does conduct his inferences in problems of everyday life.The difficulties that seem so prominent in the literature today are, therefore, only transient phenomena that will disappear automatically in time. Indeed, this revolution in our attitude toward inference is already an accomplished fact among those concerned with a few specialized applications; with a little familarity in its use its advantages are apparent and it no longer seems strange. It is the idea that inference was once thought to be tied to frequencies in random experiments, that will seem strange to future generations.     

Some Must Die

The transplantation and procurement of human organs has become almost routine in American society. Yet, organ transplantation raises difficult ethical and psychosocial issues in the context of “controlled” death, including the blurring of boundaries between life and death, self and other, healing and harming, and killing and letting die. These issues are explored in the context of the actual experiences of organ donors and recipients, brain death, the introduction of non‐heartbeating donor protocols, and the increasing reliance on living donors. The author draws on a thematic analysis of the way that organ transplantation is presented in the media, films, and science fiction and on his clinical experience as a psychiatrist working with transplant patients, their families, and the nurses and physicians who care for them.     

Some not-so-sacred cows

Many concepts in counseling and guidance that we tend to take for granted may be highly debatable rather than wholly acceptable. In particular, we need to take a fresh look at some popular ideas about objectivity, confidentiality, nonjudgmentalness, nonmanipulativeness, and computerization. This article suggests, not in protest nor in pique, that some reflection is in order.     

Some introductory thoughts

Education must be a central part of the building of Europe: because access to knowledge can overcome the dangers of exclusion, but also because education offers the key to citizenship and thereby to the future of Europe.     

Some rao-guttman relationships

An examination of the determinantal equation associated with Rao's canonical factors suggests that Guttman's best lower bound for the number of common factors corresponds to the number of positive canonical correlations when squared multiple correlations are used as the initial estimates of communality. When these initial communality estimates are used, solving Rao's determinantal equation (at the first stage) permits expressing several matrices as functions of factors that differ only in the scale of their columns; these matrices include the correlation matrix with units in the diagonal, the correlation matrix with squared multiple correlations as communality estimates, Guttman's image covariance matrix, and Guttman's anti-image covariance matrix. Further, the factor scores associated with these factors can be shown to be either identical or simply related by a scale change. Implications for practice are discussed, and a computing scheme which would lead to an exhaustive analysis of the data with several optional outputs is outlined.     

Some quick arithmetic

Mathematical abilities for the four simple arithmetic operations were studied on a sample of 53 female right-handers. True and false statements were presented auditorily and a manual response was required as to the trueness of the statements. Response times, accuracy, and laterality index showed no significant ear advantage, but the responses to true statements were significantly faster than to the false ones. The shortest response times were found for addition problems, and the longest for subtractions. The correlation between the size of the difference between the two operands and response time was not conclusive but the trend was unexpectedly positive.