The focus of the article is on the complex cognitive process involved in learning the concept of "straightness" in Non-Euclidean geometry. Learning new material is viewed through a conflict resolution framework, as a student questions familiar assumptions understood in Euclidean geometry. A case study reveals how mathematization of the straight…

Smooth pursuit eye movements enable us to focus our eyes on moving objects by utilizing well-established mechanisms of visual motion processing, sensorimotor transformation and cognition. Novel smooth pursuit tasks and quantitative measurement techniques can help unravel the different smooth pursuit components and complex neural systems involved…

This article discusses a formula which corrects perspective error when photographic techniques are used to record human movement for analysis. (JS)

The effects of pure tone stimulation on ongoing motor activity of infants 1 to 4 days of age were studied using a passive, contactless monitoring device. Stimuli were pure tone bursts of 0.5, 1, and 4 kHz presented free field at an approximate level of 70 dB A. Signal trials consisted of 500 ms tone bursts, with rise/fall time equal to 10 ms, and…

A fly-only group (N=16) of Navy replacement pilots undergoing fleet readiness training in the SH-3 helicopter was compared with groups pre-trained on Device 2F64C with: (1) visual only (N=13); (2) no visual/no motion (N=14); and (3) one visual plus motion group (N=19). Groups were compared for their SH-3 helicopter performance in the transition…

This paper develops criteria in which sport, from the performer's perspective of the experience, may be considered as an aesthetic experience. (RC)

While running up an incline at a speed chosen by themselves, subjects apparently will perceive the work effort to be the same as running on the level, when in fact it is costing them more energy. (MM)

Results indicate that infants are able to recognize a human face from a specific motion pattern even when the face lacks static facial features. (PCB)

Examines discrimination of geometric shapes by three-month-old infants who were presented with geometric stimuli moving laterally at two different velocities. Finds that subjects discriminate between geometric forms at velocities that, according to previous findings, might interfere with shape discrimination. Discusses the possible interactive…

Pulsed ultrasound was used to study tongue movements in the speech of children from 3 to 11 years of age. Speech data attained were characteristic of systems that can be described by second-order differential equations. Relationships observed in these systems may indicate that speech control involves tonic and phasic muscle inputs. (Author/RH)

Accuracy of horizontal arm-positioning toward the midline of the body was investigated, comparing two methods of presentation of the test position (verbal versus passive movement) and three extents of angular displacement. (RC)