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Fang, Qing-ting; Li, Ze-you; Yu, Qi-pan; Zou, Cao-yi; Li, Si-qing; Luo, Duan-bin – Physics Education, 2021
By building a schlieren optical system, the visualization of a 40 KHz sound wave is realized. By using the schlieren system, the demonstration of acoustic reflection, interference and diffraction can be easily realized. At the same time, the visual acoustic field provides another simple way for the measurement of sound velocity. In this paper, the…
Descriptors: Optics, Physics, Science Instruction, Undergraduate Students
Pena, Marcela; Bion, Ricardo A. H.; Nespor, Marina – Journal of Experimental Psychology: Learning, Memory, and Cognition, 2011
The iambic-trochaic law has been proposed to account for the grouping of auditory stimuli: Sequences of sounds that differ only in duration are grouped as iambs (i.e., the most prominent element marks the end of a sequence of sounds), and sequences that differ only in pitch or intensity are grouped as trochees (i.e., the most prominent element…
Descriptors: Visual Stimuli, Auditory Stimuli, Memory, Experiments
Helseth, L. E. – European Journal of Physics, 2011
We propose a simple and fascinating experiment for studying diffusion in gels using a pH-sensitive dye. By doping agar with methyl red, we obtain a gel which rapidly reacts to changes in pH by changing its absorption spectrum. The pH gradients can be followed using a digital camera, and we demonstrate here that the pH-sensitive colour changes can…
Descriptors: Photography, Chemistry, Experiments, Visual Stimuli
Catelli, Francisco; Giovannini, Odilon; Bolzan, Vicente Dall Agnol – Physics Education, 2011
The interference fringes produced by a diffraction grating illuminated with radiation from a TV remote control and a red laser beam are, simultaneously, captured by a digital camera. Based on an image with two interference patterns, an estimate of the infrared radiation wavelength emitted by a TV remote control is made. (Contains 4 figures.)
Descriptors: Photography, Physics, Radiation, Television
Xie, Charles – Journal of Chemical Education, 2011
Almost all chemical processes release or absorb heat. The heat flow in a chemical system reflects the process it is undergoing. By showing the temperature distribution dynamically, infrared (IR) imaging provides a salient visualization of the process. This paper presents a set of simple experiments based on IR imaging to demonstrate its enormous…
Descriptors: Chemistry, Visual Stimuli, Science Education, Classroom Environment
Souza, Karina Ap F. D.; Porto, Paulo Alves – Science & Education, 2012
Assuming that textbooks give literary expression to cultural and ideological values of a nation or group, we propose the analysis of chemistry textbooks used in Brazilian universities throughout the twentieth century. We analyzed iconographic and textual aspects of 31 textbooks which had significant diffusion in the context of Brazilian…
Descriptors: Textbooks, Physics, Chemistry, Science Education
Verdonschot, Rinus G.; Middelburg, Renee; Lensink, Saskia E.; Schiller, Niels O. – Cognition, 2012
In a long-lag morphological priming experiment, Dutch (L1)-English (L2) bilinguals were asked to name pictures and read aloud words. A design using non-switch blocks, consisting solely of Dutch stimuli, and switch-blocks, consisting of Dutch primes and targets with intervening English trials, was administered. Target picture naming was facilitated…
Descriptors: Priming, Inhibition, Cognitive Processes, Indo European Languages
Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2011
This article presents a new technique for performing most well-known demonstrations of wave optics. Demonstrations which are normally very hard to show to more than a few people can be presented easily to very large audiences with excellent visibility for everyone. The proposed setup is easy to put together and use and can be very useful for…
Descriptors: Audiences, Optics, Demonstrations (Educational), High Schools
Velasco, S.; White, J. A.; Roman, F. L. – Physics Teacher, 2010
The effect of density inversion on the convective flow of water in a spherical glass flask cooled with the help of an ice-water bath is shown. The experiment was carried out by temperature measurements (cooling curves) taken at three different heights along the vertical diameter of the flask. Flows inside the flask are visualized by seeding the…
Descriptors: Scientific Concepts, Evaluation Methods, Visual Stimuli, Hands on Science
Gale, Tim M.; Laws, Keith R.; Foley, Kerry – Brain and Cognition, 2006
Some models of object recognition propose that items from structurally crowded categories (e.g., living things) permit faster access to superordinate semantic information than structurally dissimilar categories (e.g., nonliving things), but slower access to individual object information when naming items. We present four experiments that utilize…
Descriptors: Classification, Identification, Visual Perception, Recognition (Psychology)
Kaschak, Michael P.; Zwaan, Rolf A.; Aveyard, Mark; Yaxley, Richard H. – Cognitive Science, 2006
Previous reports have demonstrated that the comprehension of sentences describing motion in a particular direction (toward, away, up, or down) is affected by concurrently viewing a stimulus that depicts motion in the same or opposite direction. We report 3 experiments that extend our understanding of the relation between perception and language…
Descriptors: Auditory Perception, Motion, Language Processing, Sentences
Brown, James Robert – Interchange: A Quarterly Review of Education, 2006
A number of thought experiments are cited, some well-known, some not. These illustrate the power of thought experiments. Other examples are given that show some of the dangers. As well as examples from the science, some examples of visual reasoning from mathematics are also presented, again with an eye to illustrating their promise and perils.…
Descriptors: Cognitive Processes, Ethics, Science Experiments, Thinking Skills
Ansorge, Ulrich; Neumann, Odmar – Journal of Experimental Psychology: Human Perception and Performance, 2005
In 5 experiments, the authors tested whether the processing of nonconscious spatial stimulus information depends on a prior intention. This test was conducted with the metacontrast dissociation paradigm. Experiment 1 demonstrated that masked primes that could not be discriminated above chance level affected responses to the visible stimuli that…
Descriptors: Prompting, Experiments, Spatial Ability, Models
Iidaka, Tetsuya; Matsumoto, Atsushi; Haneda, Kaoruko; Okada, Tomohisa; Sadato, Norihiro – Brain and Cognition, 2006
Functional magnetic resonance imaging (fMRI) and event-related potential (ERP) experiments were conducted in the same group of subjects and with an identical task paradigm to investigate a possible relationship between hemodynamic and electrophysiological responses within the brain. The subjects were instructed to judge whether visually presented…
Descriptors: Metabolism, Physiology, Brain, Visual Stimuli
Leek, E. Charles; Reppa, Irene; Arguin, Martin – Journal of Experimental Psychology: Human Perception and Performance, 2005
This article examines how the human visual system represents the shapes of 3-dimensional (3D) objects. One long-standing hypothesis is that object shapes are represented in terms of volumetric component parts and their spatial configuration. This hypothesis is examined in 3 experiments using a whole-part matching paradigm in which participants…
Descriptors: Vision, Experiments, Cognitive Processes, Visual Perception
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