Biomedical subjects

T T Hewett

Publications and source records attributed to T T Hewett.

5 recordsLinked to original sources

PubMed1999

A case study report on integrating statistics, problem-based learning, and computerized data analysis.

This paper addresses the pedagogical advantages of teaching statistics not as a stand-alone subject in itself, but rather as a topic integrated into teaching hands-on, problem-based computer-assisted data analysis. For over 10 years, such a two-term course has been taught at Drexel University in lieu of the usual statistics courses formerly taken by undergraduate majors in psychology and sociology. One virtue of the courses as currently implemented is that students seem to learn not just how to perform statistical procedures but how to apply them on their own.

Electronic Data Processing↗

PubMed1984

A survey of contact lens wearers. Part I: Design and demographics.

A mail survey of several hundred hard and soft contact lens wearers was conducted, focusing upon demographic characteristics of wearers, factors involved with purchasing, wearing and caring for lenses, and the attitudes, perceptions, and anxieties which wearers have about lenses. The results are presented in two papers. This paper focuses upon survey design and the demographics of the respondents. A number of differences were found between hard and soft lens wearers and between the regular and the occasional and former wearers. For example, occasional and former wearers in general were less likely to have other lens wearers in their family and were more likely than regular wearers to report purchase of lenses to improve their appearance or their vision. Some implications are discussed.

Adult↗

PubMed1984

A survey of contact lens wearers. Part II: Behaviors, experiences, attitudes, and expectations.

A mail survey of several hundred hard and soft contact lens wearers was conducted focusing upon demographic characteristics of wearers, factors involved with purchasing, wearing and caring for lenses, and the attitudes, perceptions, and anxieties which wearers have about lenses. The results are presented in two papers. This paper reports on wearer behaviors, experiences, attitudes, and expectations. A number of differences were found between hard and soft lens wearers and between the regular and the occasional and former wearers. For example, occasional and former wearers in general were considerably more likely than regular wearers to express anxieties about several aspects of lens wear and care. Some implications of the data are discussed and suggestions for future research are outlined.

Anxiety↗

PubMed1979

Evidence that the colored shadow effect is retinal.

Polarized lenses were employed to present the images of the colored shadows effect separately to each eye. The phenomenon was perceived only when both images were viewed on the same retina, leading to the conclusion that the effect is entirely retinal in origin and does not involve the central nervous system.

Cerebral Cortex↗

PubMed1979

Evidence that line illusions originate in the central nervous system.

Polarized lenses were employed to present the components of four line illusions separately to each eye. The phenomena were perceived even when both images were disparately presented, leading to the conclusion that the effect originates in the central nervous system and does not require the retina.

Brain↗