Learning to walk is a dynamic process requiring the fine coordination, assembly, and balancing of many body segments at once. For the young walker, coordinating all these behavioral levels may be quite daunting. In this study, we examine the whole-body strategies to which infants resort to produce their first independent steps and progress over…

Observers can recognize other people from their movements. What is interesting is that observers are best able to recognize their own movements. Enhanced visual sensitivity to self-generated movement may reflect the contribution of motor planning processes to the visual analysis of human action. An alternative view is that enhanced visual…

The Sun's atmosphere is a highly structured but dynamic place, dominated by the solar magnetic field. Hot charged gas (plasma) is trapped on lines of magnetic force that can snap like an elastic band, propelling giant clouds of material out into space. A range of ground-based and space-based solar telescopes observe these eruptions, particularly…

During a recent unit on characteristics of animals in different environments, "backyard safari" trips around the schoolyard provided opportunities for students to describe ways that animals are adapted to their unique environments. This led to a discussion of how polar bears have adjusted to living in the arctic. Therefore, students' questions…

The null result of the Michelson-Morley experiment and the constancy of the one-way speed of light in the "rest system" are used to formulate a simple problem, to be solved by elementary geometry techniques using a pair of compasses and non-graduated rulers. The solution consists of a drawing allowing a direct visualization of all the fundamental…

When a moving ball collides elastically with an identical, initially stationary ball, the incident ball will either come to rest (head-on collision; see Fig. 1) or will acquire a velocity that is perpendicular to that acquired by the target ball (oblique collision; see Fig. 2). These two possible outcomes are related in an interesting way, which…

The similar mathematical forms of Coulomb's law and Newton's law of gravitation suggest that two uniformly charged spheres should be able to orbit each other just as two uniform spheres of mass are known to do. In this paper we describe an experiment that we performed to demonstrate such an orbit. This is the first published account of a…

Three experiments were conducted to test the hypothesis that the perception of limb orientation depends on inertial eigenvectors against the alternative that it depends on the center of mass. In all experiments, each participant pointed at visible targets with his or her occluded right arm while center-of-mass and inertial eigenvectors were…

This article presents a problem that can help high school students develop the concept of instantaneous velocity and connect it with the slope of a tangent line to the graph of position versus time. It also gives a method for determining the tangent line to the graph of a polynomial function at any point without using calculus. (Contains 1 figure.)

This study is an evaluation of "Exploring Motion and Forces: Speed, Acceleration, and Friction" ("M&F") developed by ARIES of the Harvard-Smithsonian Center for Astrophysics (2001). Although "M&F" has been used in many schools and field-tested, it has never been evaluated in rigorous experimental or…

The present study adopted a cognitive linguistic framework--Talmy's (1985, 1991, 2000) typological classification of motion events--to investigate how second-language (L2) Chinese learners come to express motion events in a targetlike manner. Fifty-five U.S. university students and 20 native speakers of Chinese participated in the study. A…

This paper reports on three primary school students' explorations of 3D rotation in a virtual reality learning environment (VRLE) named VRMath. When asked to investigate if you would face the same direction when you turn right 45 degrees first then roll up 45 degrees, or when you roll up 45 degrees first then turn right 45 degrees, the students…

Aim: The Infant Motor Profile (IMP) is a qualitative assessment of motor behaviour of infants aged 3 to 18 months. The aim of this study was to investigate construct validity of the IMP through the relation of IMP scores with prenatal, perinatal, and neonatal variables, including the presence of brain pathology indicated by neonatal ultrasound…

The author of this article responds to the seven papers in this journal that commented on his book titled "Body Consciousness: A Philosophy of Mindfulness and Somaesthetics." Shusterman responds to comments and criticisms made on the subjects of (1) embodiment and gender; (2) Asian cultural dimensions; (3) the somaesthetics of music; (4)…

The author is naturally a kinesthetic learner. As a child she was steeped in the wilds of seashore, fields, and woods in which she was free to roam, explore, and imagine in a deeply sensual, movement-oriented world. Because of these first experiences of freedom of movement and spontaneity in the highly intense natural world, she found the…