This paper reports on one teacher’s attempts to teach critical algebra understandings to a Year 9 class in ways that engage the students and help them to develop positive perceptions of their ability to learn algebra in a “rigorous and symbolic way”. This paper describes a 6week algebra intervention based upon connecting concrete representations with symbolic expressions and equations through t...

Recent studies suggest that an auditory nonlinearity converts second-order sinusoidal amplitude modulation (SAM) (i.e., modulation of SAM depth) into a first-order SAM component, which contributes to the perception of second-order SAM. However, conversion may also occur in other ways such as cochlear filtering. The present experiments explored the source of the first-order SAM component by inve...

J. J. Gibson's approach to,the study of perception emphasizes the way an active observer picks up information from the environment. The central postulates of Gibson's approach are that (1) visual space is defined by information (such as texture gradients) contained on environmental surfaces, (2) the crucial information for perception is information that remains invariant as an observer moves th...

The most famous modern definition of health was created during a Preamble to the Constitution of the World Health Organization in 1946: "Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity." This definition has not been amended and, since then, many indicators have been proposed to measure health such as Self-Assessed Health (S...

background; methadone maintenance therapy (mmt) is an evidence-based approach for opiate addiction treatment. while its effectiveness in reducing opiate use has been evidently verified, unanswered questions with respect to the cultural scenarios for mmt programs remain unanswered. this study was conducted to explore understanding address mmt initiation among a women-recruited sample of persons ...