Lowered intelligence relative to controls is evident by mid-childhood in children with sickle cell disease. There is consensus that brain infarct contributes to this deficit, but the subtle lowering of IQ in children with normal MRI scans might be accounted for by chronic systemic complications leading to insufficient oxygen delivery to the brain.…

Objective: The purpose of this study was to assess heritability of activity, attention, and impulsivity by comparing young monozygotic (MZ) twins with dizygotic (DZ) twins using objective measures. Method: The OPTAx test is an infrared motion analysis to record the movement pattern during a continuous performance test. Seventeen MZ and 12 same…

Sleep disorders are common in childhood. Their prevalence is especially high in the presence of disability or chronic illness. They cause considerable stress to the children themselves and to their parents. Sleep deprivation leads to daytime behavioral problems and educational difficulties. In assessing sleep problems thorough history taking is…

The study investigated the role of social reinforcement, when teaching two preschoolers with no functional vocal verbal behavior first instances of echoic responses, using rapid motor imitation responding. The dependent variables for the experiment were: (1) echoic tacts (echoics presented under the controlling variables of tacts) and (2)…

Time-saving strategies are offered for determining appropriateness of assistive technology devices for persons with physical disabilities in movement and posture. The strategies are based on the principle that even an individual with the most severe involvement has certain controllable movements that can form the foundation for interaction with an…

This paper discusses two software packages used in kinematics courses at Purdue University, Calumet (Indiana) and some algorithms written by students for cam design. The first software package, 4BAR, requires the user to define the particular four bar linkage in terms of lengths of the individual links and the angle and distance to the coupler…

Undergraduates from chemical engineering, applied chemistry, and environmental science courses, together with first-year postgraduate research students in electrochemical technology, are provided with an experiment that demonstrates the reduction of dissolved oxygen in aerated seawater at 25°C. Oxygen reduction is examined using linear sweep…

This document was prepared as a training manual for people interested in developing appropriate technological approaches to using wind power to pump water. The training program is divided into two basic formats, one in which a session focuses on the design process and participants are expected to do some design work in groups, and another which…

Through everyday experience people acquire knowledge about how moving objects behave. For example, if a rock is thrown up into the air, it will fall back to earth. Research has shown that people's ideas about why moving objects behave as they do are often quite inconsistent with the principles of classical mechanics. In fact, many people hold a…

Students have well-formed but incorrect theories of simple motion. As children, they interpret many phenomena related to motion before encountering any formal science education. Since most adults have misconceptions, children's questions are not answered correctly, so the misconceptions persist. Thus, every science teacher must face the prospect…

This guidebook consists of 11 chapters. Chapter 1 provides information on organizing a physics course, considering such topics as types of physics programs, laboratory work, curriculum selection, and computers/calculators. Chapters 2 to 11 focus, respectively, on the topic areas of forces, motion, dynamics, energy, heat, the atomic structure of…

In the framework of a curriculum reform in the Netherlands, an interdisciplinary open inquiry assignment has been introduced as a part of the final secondary school examinations. We developed and evaluated a preparatory open inquiry assignment to be used in science and mathematics departments of schools, in collaboration with each other: the…

New treatments of reading disabilities have recently been developed. New medical therapies for reading disabilities link poor functions of the mechanism that controls balance and movement to reading disability and focus medical attention on diet as a cause of hyperactive behavior and learning disorders. These medical therapies are still…

THIS GUIDE IS DESIGNED FOR USE IN PLANNING AND TEACHING THE SCIENCE CURRICULUM IMPROVEMENT STUDY (SCIS) UPPER ELEMENTARY GRADE UNIT "POSITION AND MOTION". GENERAL INFORMATION INCLUDES (1) A UNIT OVERVIEW, (2) BACKGROUND INFORMATION ON POSITION AND MOTION CONCEPTS, (3) PLANNING AND TEACHING SUGGESTIONS, AND (4) AN EQUIPMENT LIST. THE UNIT…

Centrally concerned with research which investigated how people learn from pictures, this issue of "Viewpoints" provides a series of review articles and a bibliography. The first article reviews recent research using adult subjects in commonly used psychological research paradigms--recognition memory, recall associate learning--and introduces…