Maturation of fetal response to music was characterized over the last trimester of pregnancy using a 5-minute piano recording of Brahms' Lullaby, played at an average of 95, 100, 105 or 110 dB (A). Within 30 seconds of the onset of the music, the youngest fetuses (28-32 weeks GA) showed a heart rate increase limited to the two highest dB levels;…

The effect of element density on selective orienting was examined in 2 experiments with 2- and 4.5-month-old infants. Selective visual orienting to a singleton oscillating target that appeared with other static bars was used to study the effects of element density. Increasing the set size and density of the static bars decreased selective…

The authors describe 3 human spatial navigation experiments that investigate how limitations of perception, memory, uncertainty, and decision strategy affect human spatial navigation performance. To better understand the effect of these variables on human navigation performance, the authors developed an ideal-navigator model for indoor navigation…

The authors proposed a model of the control of interceptive action over a ground plane (Chardenon, Montagne, Laurent, & Bootsma, 2004). This model is based on the cancellation of the rate of change of the angle between the current position of the target and the direction of displacement (i.e., the bearing angle). While several sources of visual…

This paper is meant to be an introduction to and general reference for ultrasound imaging for new and moderately experienced users of the instrument. The paper consists of eight sections. The first explains how ultrasound works, including beam properties, scan types and machine features. The second section discusses image quality, including the…

A multiple-baseline design was used to evaluate the effects of a pre-shot putting routine on the putting performance of four NCAA Division I golfers. The routine involved a combination of multisensory imagery and simulated putting movements. Results suggested that the intervention was effective for some participants. Discussion focuses on…

Incorporate inquiry-based practices into the early childhood classroom or family child care home. Inspired by an approach to teaching and learning born in Reggio Emilia, Italy, this book emphasizes investigation anchored by drawing, painting, and other art activities. It provides advice on setting up a studio space for art and inquiry and fifteen…

Empirical correlations are a practical means of providing approximate answers to problems in physics whose exact solution is otherwise difficult to obtain. The correlations relate quantities that are deemed to be important in the physical situation to which they apply, and can be derived from experimental data by means of dimensional and/or scale…

The implementation of a modern game-console controller as a data acquisition interface for physics experiments is discussed. The investigated controller is equipped with three perpendicular accelerometers and a built-in infrared camera to evaluate its own relative position. A pendulum experiment is realized as a demonstration of the proposed…

Graphs without a time axis, such as velocity-versus-position graphs, offer interesting possibilities for exploring graphing and motion. Relations depicted by these graphs are not limited to functions. Interviews with a high school student named Olivia, who uses a motion detector to create such graphs, indicate that she uses thought experiments as…

Describes construction of an exhibit which uses the acceleration of an elevator to distinguish mass and weight. (CP)

Describes the construction of a simple accelerometer and explains its use in demonstrating acceleration, deceleration, constant speed, measurement of acceleration, acceleration and the inclined plane and angular and radial acceleration. (GS)

In this paper a formalism is developed that enables one to write by inspection the matrix which represents the transformation between two coordinate systems, one of which is rotated about an arbitrary axis. (Author/CP)

Describes a technique for imparting essentially the same speed, in opposite directions, to two gliders to demonstrate that total momentum of equal masses traveling at the same speed in opposite directions is zero. Also describes a technique using a compression spring and beeswax for momentarily holding two gliders together prior to starting them…

Portion of author's doctoral dissertation, University of Southern California, 1967. Research performed under Grant No. OE 7-14-1490-293, Project No. 5-1731, Office of Education, U.S. Dept. of Health, Education, and Welfare.