This study examined problematic communication in pilot-air traffic controller (ATC) interaction. More than 15 hours of pilot-ATC dialogue were collected by monitoring control tower frequencies at 15 U.S. airports. The transcribed data yielded a total of 34 ATCs, 270 pilots, and 1,799 turns of talk. Analyses revealed that (a) communication…

With a house languishing in the real-estate doldrums of southwestern Ohio, Edward F. Leonard III and his family have lived apart since he took over as president of Bethany College, in Kansas, nearly a year ago. Their situation is like that of many faculty members and administrators frustrated by housing prices across the country. Existing-home…

To establish a series of derived relations between arbitrary stimuli, 20 subjects were exposed to nonarbitrary and arbitrary relational training and testing procedures. Subjects were then exposed to an avoidance conditioning procedure in which one member from each relation was established as a discriminative stimulus for avoidance and…

A generalization of a well-known result for the arctangent function poses a number of interesting questions concerning the existence of integer solutions of related problems.

The authors describe a choice-making intervention with two children who had developmental disabilities and demonstrated public disrobing in school settings. The children also urinated in their clothing, apparently to gain access to new and more preferred apparel. The intervention gave the children a choice to change into high-preference clothes at…

A near miss is a failure that was close to a win. In this paper we analyze the primary documents associated with a case that was brought before the Nevada Gaming Commission in 1988. This case resulted in the 1989 ruling that the proprietary computer algorithms used by one slot machine manufacturer to create a high number of near misses on the…

Visualizing spatial material is a cornerstone of human problem solving, but human visualization capacity is sharply limited. To investigate the sources of this limit, we developed a new task to measure visualization accuracy for verbally-described spatial paths (similar to street directions), and implemented a computational process model to…

In responding to the research on conceptual change, this article attempts to make two points. First, scientific concepts are not possessed by individuals; rather, they are part of a culture's resources, which individuals learn to use for their own or for group purposes. Second, particular concepts are most effectively mastered when the learner is…

Comments on the original article "Plate tectonics in the classification of personality disorder: Shifting to a dimensional model," by T. A. Widiger and T. J. Trull (2007). Widiger and Trull raised important nosological issues that warrant serious consideration not only for the personality disorders but for all mental disorders as the Diagnostic…

An elementary proof by contradiction of the Collatz Conjecture (CC) (also known as the "3X + 1" Conjecture), is presented. A modified form of the Collatz transformation is formulated, leading to the concept of a modified Collatz chain. A smallest counterexample N[subscript 0] is hypothesized; the existence of N[subscript 0] implies that…

Six tree shrews and 8 rats were tested for their ability to infer transitively in a spatial discrimination task. The apparatus was a semicircular radial-arm maze with 8 arms labeled A through H. In Experiment 1, the animals were first trained in sequence on 4 discriminations to enter 1 of the paired adjacent arms, AB, BC, CD, and DE, with right…

The author analyzes two texts, Gloria Whelan's "Homeless Bird" and Deborah Ellis's "Parvana's Journey", in an attempt to explain some of the problems and difficulties associated with those texts. The author examines Whelan's representations of India and finds troubling binaries associated with that text. In comparison, the…

The study examines the influence of parental and grandparental major depressive disorder (MDD) on behavior problems in children. The results conclude that MDD in parents and grandparents may result in high levels of incorporation problems of MDD in children but don't indicate additional risk.

This state-of-the-art practitioner resource and course text provides a comprehensive view of adolescent development and spells out effective ways to help teens who are having difficulties. The book illuminates protective and risk factors in the many contexts of adolescents' lives, from individual attributes to family, school, neighborhood, and…

Nurture groups are school-based interventions that offer specialist support for children and young people with social, emotional and behavioural difficulties. Initially developed as an early years intervention in the 1970s, nurture groups dwindled in the 1980s but have enjoyed something of a renaissance over the last 15 years. There are now more…