The marginal costs of instruction

This is a study of the costs of instruction in a large public research university. It departs from other work on instructional costs in its attempt to draw inferences about the economic costs of incremental or marginal enrollments. Focusing on graduate education, we examine how the costs directly facing faculty differ from those incurred by the institution's administration and legislature as reflected in the budgetary rewards for instruction. These cost differences provide the wherewithal for a university to carry out basic research and other important functions that lack a paying clientele. The study also explores the roles of economic costs in the institution's pricing of graduate education.     

Intentionality as measured in the persistence and elaboration of communication by chimpanzees (Pan troglodytes)

In human infancy, 2 criteria for intentional communication are (a) persistence in and (b) elaboration of communication when initial attempts to communicate fail. Twenty-nine chimpanzees (Pan troglodytes) were presented with both desirable (a banana) and undesirable food (commercial primate chow). Three conditions were administered: (a) the banana was delivered (successful communication), (b) half of the banana was delivered (partially successful communication), and (c) the chow was delivered (failed communication). The chimpanzees exhibited persistence in and elaboration of their communication in every condition except when the banana was delivered. Thus, their communication was about a specific item, demonstrating that both intentionality and nonverbal reference are capacities shared by humans with our nearest living relatives, the great apes.     

Predictive text entry with PAL and children with learning difficulties

Nine case studies were conducted to evaluate the usefulness of a predictive text entry program within a classroom environment. The program, PAL, was found to be very successful in eight of the cases. For children with poor motor control, the key-saving aspects speeded up text creation. Of even greater significance was the extent to which children with severe spelling problems were helped. They were able to produce much higher quality written work with a substantial reduction in the number of spelling errors. This provided great motivation for the children, and teaching staff commented on their improved confidence and attention span, as well as stimulation of language and vocabulary development. One of the children was on the verge of being classified as a non-reader and, although progress was slow, a significant improvement in the child's work was observed.