22 research outputs found
Soil loss by water erosion in areas under maize and jack beans intercropped and monocultures
Asymptotic standard errors of irt observed-score equating methods
IRT, observed-score equating, equipercentile equating, chain equating, asymptotic standard errors,
Exploring Lay Uncertainty about an Environmental Health Risk
How do laypeople perceive uncertainties about environmental health risks? How do risk-related cognitions and emotions influence these uncertainties, and what roles do sociodemographic and contextual factors, risk judgments, and information exposures play? This study explores these questions using secondary analyses of survey data. Results suggest that uncertainty reflects individual-level emotions and cognitions, but may also be shaped by a variety of social and contextual factors. Emotions (worry and anger) are strongly associated with perceived uncertainty, and perceived lack of knowledge and perceived likelihood of becoming ill are weakly associated with it. Several demographic variables, information exposures, and risk judgment variables affect perceived uncertainty indirectly, primarily through perceived knowledge and emotions. These findings raise a variety of questions about the complex and dynamic interactions among risk contexts, socioeconomic factors, communication processes, perceived knowledge, emotions, and perceived uncertainties about risks
A New Concurrent Calibration Method for Nonequivalent Group Design under Nonrandom Assignment
common-item design, concurrent calibration, IRT linking, item response theory, Monte Carlo expectation maximization (MCEM) algorithm, multinomial logistic regression model, nonignorable missingness,