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Cognition and Perception

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Articles 61 - 70 of 70

Full-Text Articles in Medicine and Health Sciences

Melatonin And Its Effect On Learning And Memory, Nechama Leah Bauman (Cahn) Jan 2012

Melatonin And Its Effect On Learning And Memory, Nechama Leah Bauman (Cahn)

The Science Journal of the Lander College of Arts and Sciences

Melatonin is a neurohormone produced by the pineal gland and secreted into the body in a circadian rhythm. Melatonin is known to be involved in many vital body functions, including sleep, reproduction, and immune response. Exogenous melatonin, sold as over the counter natural supplements in drugstores, is commonly taken by many people to help cure various ailments. Melatonin also plays a role in the hippocampus. This paper investigates the effects of melatonin on long-term potentiation in the hippocampus. Long-term potentiation, described as a long-lasting strengthening of synapses between nerve cells, is thought to be responsible for long-term memory retention. It …

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Over A Decade Of Comparative Risk Analysis: A Review Of The Human Health Rankings, David M. Konisky Mar 2001

Over A Decade Of Comparative Risk Analysis: A Review Of The Human Health Rankings, David M. Konisky

RISK: Health, Safety & Environment (1990-2002)

The author reviews a method for undertaking a cross-project comparison of comparative risk analyses to understand which environmental problem areas have been cited most as often posing the severest risks.

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Age Differences In Personal Risk Perceptions: A Note On An Exploratory Descriptive Study, Juanita V. Field, George E. Schreer Sep 2000

Age Differences In Personal Risk Perceptions: A Note On An Exploratory Descriptive Study, Juanita V. Field, George E. Schreer

RISK: Health, Safety & Environment (1990-2002)

The authors test for differences in risk perceptions among different age groups.

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Varied Definitions Of Risk Related To Sensation Seeking Trait, Pål Ø.U. Dåstol, Britt-Marie Drottz-Sjöberg Jun 2000

Varied Definitions Of Risk Related To Sensation Seeking Trait, Pål Ø.U. Dåstol, Britt-Marie Drottz-Sjöberg

RISK: Health, Safety & Environment (1990-2002)

[Excerpt] "Risk judgments seem related to which definitions of risk a person uses. Earlier studies suggest that people who use a "probability" definition of risk give different, and somewhat lower, subjective estimates of risk than those who instead prefer a "consequence" definition. In addition, an "optimistic bias" often can be found, and subjects usually evaluate personal risk systematically lower than risk for people in general."

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Frequency Of Use And Perceived Credibility Of Information Sources And Variations By Socioeconomic Factors Among Savannah River Stakeholders, Bryan L. Williams, Alex Vallei, Sylvia Brown, Michael Greenberg Jan 2000

Frequency Of Use And Perceived Credibility Of Information Sources And Variations By Socioeconomic Factors Among Savannah River Stakeholders, Bryan L. Williams, Alex Vallei, Sylvia Brown, Michael Greenberg

RISK: Health, Safety & Environment (1990-2002)

The authors examine the factors effecting credibility of risk communication in the communities surrounding the Savannah River Nuclear Weapons Site.

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Variation In Environmental Risk Perceptions And Information Sources Among Three Communities In El Paso, Theresa L. Byrd, James Vanderslice, Susan K. Peterson Sep 1997

Variation In Environmental Risk Perceptions And Information Sources Among Three Communities In El Paso, Theresa L. Byrd, James Vanderslice, Susan K. Peterson

RISK: Health, Safety & Environment (1990-2002)

The authors report the results of a pilot study of environmental risk and sources of environmental information in three socio-economically and culturally distinct communities in Texas.

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Use Of Visual And Tactile Behaviors By Rats (Rattus Norvegicus) In An Object Discrimination Swimming Task, Todd Wiebers Jan 1994

Use Of Visual And Tactile Behaviors By Rats (Rattus Norvegicus) In An Object Discrimination Swimming Task, Todd Wiebers

Journal of the Arkansas Academy of Science

When challenged with a cognitive task, rats demonstrate a behavioral flexibility in use and preference of sensory modalities. The present study describes visual and tactile behaviors used by rats in a two choice object discrimination swimming task. The task was designed to preclude use of other sensory modalities and could not be solved via spatial strategies. Fourteen rats learned to criterion a series of 10 discrimination problems. Rats exhibited three stereotypic visual and two stereotypic tactile behaviors over the course of the study. Data analyses indicated that rats demonstrated these behaviors more frequently as they became more familiar with the …

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Economic Impacts Of Noxious Facilities: Incorporating The Effects Of Risk Aversion, Leslie A. Nieves Jan 1993

Economic Impacts Of Noxious Facilities: Incorporating The Effects Of Risk Aversion, Leslie A. Nieves

RISK: Health, Safety & Environment (1990-2002)

The author suggests an integrative approach for projecting economic impacts of facilities that elicit public Risk aversion. She incorporates both economic stimulus effects and perception-based effects of facilities on the host area economy. Empirical findings are compared and an impact estimation framework is suggested for integrating psychometric and econometric techniques.

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Nothing Recedes Like Success - Risk Analysis And The Organizational Amplification Of Risks, William R. Freudenburg Jan 1992

Nothing Recedes Like Success - Risk Analysis And The Organizational Amplification Of Risks, William R. Freudenburg

RISK: Health, Safety & Environment (1990-2002)

Professor Freudenburg believes that there is room for improvement in Risk analysis, particularly in drawing on systematic studies of human behavior in the calculation of real, empirical probabilities of failure. The need is argued to be especially acute where technological Risks are associated with low expected probabilities of failure and are managed by human organizations for extended periods of time. This permits complacency to set in.

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Risk Perception And Drug Safety Evaluation, Ilan B. Vertinsky, Donald A. Wehrung Sep 1991

Risk Perception And Drug Safety Evaluation, Ilan B. Vertinsky, Donald A. Wehrung

RISK: Health, Safety & Environment (1990-2002)

The authors present a Risk communication framework based on a survey of empirical research concerning public Risk perceptions. They also apply it to the area of pharmaceutical regulation to suggest more effective regulatory strategies.

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