Based on a long-term public school system study, the paper examines the sociopsychological process through which conflicts move around in organizations and are transported from one place to another. The conceptualization draws on "triangulation" from social psychology and family therapy and "splitting," developed in…

Describes an experiment demonstrating Lenz's law by measuring a magnet falling through a copper tube compared to a nonmagnet falling. Presents diagrams and pictures showing the apparatus. (YP)

Describes a situation in which a ball strikes a stationary ball. Reviews theoretical findings of such collisions and two important related factors which are momentum and kinetic energy. Includes diagrams for showing the use of a pendulum apparatus, the collision of different size balls, and chain collisions. (RT)

Ninth- and 10th-grade students (n=310) participated in a study designed to determine the effect of three variables (viewing a demonstration, engaging in student to student discussion, and/or reading a refutational text) on conceptual change in physics. Results revealed that reading the refutational text helped students change their intuitive ideas…

Explores strategies in the situation of a runner trying to evade a tackler on a football field. Enables the student to test intuitive strategies in a familiar situation using simple graphical and numerical methods or direct experimentation. (JRH)

Describes a system of interactive astronomy whereby nonscience students are able to acquire their own images from a room remotely linked to a telescope. Briefly discusses some applications of Charge-Coupled Device cameras (CCDs) in teaching free fall, projectile motion, and the motion of the pendulum. (JRH)

Shows that the conventional wisdom about the extreme inaccuracy of stopwatch measurements during the acceleration and free fall of objects is mistaken. (ZWH)

Presents demonstrations that use a blowgun to illustrate scientific concepts relating to acceleration, projectile motion, Newton's Laws, and work and kinetic energy. (JRH)

Assessed 13- and 20-week-olds infants' discrimination between shearing stimuli, in which columns of dots move vertically on a screen at different velocities, and foil stimuli, in which all dots move at the same velocity. Results revealed the threshold levels of dot velocity in shearing stimuli at which discrimination occurred. (BC)

Samples of the language used by 4 children were recorded longitudinally between 1.5 and 3 years of age. Children's expressions of motion were categorized into expressions involving a source, path, or goal of motion. There were developmental changes, including an increase in the use of words relating to goals as children grew older. (BC)

This study investigated the effects of a hand positioning device on aspects of upper extremity movement control and muscular activity and visual motor performance in 10 children with cerebral palsy. Although no significant results were found, individual subject data revealed a trend toward increased numbers of movement units, slower movements, and…

This study of 20 3-month-old infants with Down's syndrome and 20 nondisabled infants found that both groups were successfully trained to produce movement in an overhead crib mobile by kicking, and displayed long-term retention a week later. Conditioning and retention-test performance of the two groups did not differ. (Author/JDD)

This study of single-joint elbow flexion movements by 10 subjects with Down's syndrome (ages 14-19) and 6 control subjects concluded that there are no major qualitative deficits in the motor control mechanisms of individuals with Down's syndrome, but there might be problems with proper modulation of motor commands. (Author/JDD)

Two experiments examined the question of whether blindfolded young children and congenitally blind children show mental practice effects for blind movements that cross the body midline. Results suggested that young children with sight can show mental practice effects in the absence of visual cues. (GLR)