The interaction of conditioned taste aversions and schedule-induced polydipsia: Availability of alternative behaviors

Animals poisoned following exposure to saccharin subsequently avoided the schedule-induced consumption of saccharin. While this suppression was transient for subjects who had access only to the saccharin solution during the free-food presentations, recovery of schedule-induced saccharin consumption was significantly retarded for subjects who had concurrent access to saccharin and a running wheel. It has been suggested that the transient suppression of schedule-induced polydipsia by conditioned taste aversions results from the pellet-induced tendency to drink within the schedule-induced polydipsia procedure. That access to the running wheel reduces schedule-induced polydipsia in general and prolongs the suppression of schedule-induced polydipsia by taste aversions supports this view.     

The effects of community violence on children in Cape Town, South Africa

OBJECTIVE: The primary objective of the study was to investigate the relationship between exposure to community violence (neighborhood, school, police, and gang violence) and psychological distress in a sample of children living in the Cape Town, South Africa area. Another objective was to identify variables that moderate and mediate the relationship between exposure to community violence and psychological distress. METHODS: Face-to-face interviews were conducted with 185 children between the age of 8 and 13 from five Cape Town Township schools. Structured scales were used to measure exposure to several forms of community violence, family functioning, social support, perceptions of safety, and "unknown" locus of control. RESULTS: Exposure to all forms of violence was extremely high and resulted in substantial psychological distress. Perceived safety functioned as a mediating variable for all forms of violence. Unknown locus of control, social support, family organization, and family control moderated the effects of exposure to certain kinds of violence. Surprisingly, exposure to murder was not related to psychological distress, suggesting a possible "numbing" effect of extreme forms of violence. Hearing about violence from others had almost the same effect as actually witnessing it. Older children had witnessed more violence and were experiencing more distress, suggesting an "exposure accumulation" effect. CONCLUSIONS: The findings suggest the importance of a child's ability to feel safe in reducing the distress that occurs as a result to exposure to violence. Parents and schools can help children cope, but there appear to be limits. Early intervention, before maladaptive coping mechanisms have developed, also appears to be important.     

Teaching Contemporary Physics Topics Using Real-Time Data Obtained via the World Wide Web

As a teaching tool, the World Wide Web (WWW) is unprecedented in its ability to transmit information and enhance communication between scientist and student. Just beginning to be developed are sites that actively engage the user in the learning process and provide hands-on methods of teaching contemporary topics. These topics are often not found in the classroom due to the complexity and expense of the laboratory equipment and the WWW is an ideal tool for overcoming this difficulty. This paper presents a model for using the Internet to teach high school students about plasma physics and fusion energy. Students are given access to real-time data, virtual experiments, and communication with professional scientists via email. Preliminary data indicate that student collaboration and student-led learning is encouraged when using the site in the classroom. Scientist/student mentoring is enhanced with this form of communication.     

Empowering parents of pre-school children

This paper describes a project undertaken with parents from an inner city primary school in Hartlepool, England. The main objectives of the project were to increase the self esteem of the parents, to give them an understanding of the pre-school curriculum and to enable them to develop their skills, knowledge and confidence to become involved in school life and to take ownership of their own children's education. The project focused around the production of a video to show nursery life in the school and this production was used as a vehicle to encourage the fulfilment of the objectives described above. The paper concludes by describing the successful outcomes of the project. Some of the outcomes were planned for, but we were equally delighted with the unexpected ones.