Author relates his practical testing of the theories of bicycle stability. Investigating the steering geometry of the bicycle, using a Fortran program, led to considering the concept of self-centering p and eventually to the successful construction of an inherently unstable bicycle. (RR)

The effectiveness of motion parallax for relative and absolute distance judgments was studied using second-, fourth-, and sixth-grade children and college students. (JMB)

A survey of 26 Rorschach experts and 19 students of Rorschach use was conducted to help students using the Exner Comprehensive System determine whether to code movement for nouns with definitions that include movement. Experts and students did not reach agreement, but a literature review suggests such nouns should often be coded as movement. (SLD)

Explores the basic physics behind pulling a tablecloth out from under a set of dishes, glassware, and utensils without disturbing them. Discusses terminology of Newton's laws of motion and illustrates them using three simple examples. (NB)

Presents a project in which 11th and 12th grade students from a high school Principles of Engineering course instruct 5th grade students in Newton's laws. (KHR)

Used point-light displays (lights corresponding to the joints of the human body) to examine 3-year-olds' understanding of verbs. Found that children could extend familiar motion verbs (walking, dancing) to videotaped point-light actions shown in an intermodal preferential looking paradigm. Children watched the action matching the requested verb…

Students use the relationship between the speed of a ball and the time that a player has to react to it to understand uniform motion problems. Includes activity sheets. (Author/NB)