University of Missouri

About: University of Missouri is a education organization based out in Columbia, Missouri, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 41427 authors who have published 83598 publications receiving 2911437 citations. The organization is also known as: Mizzou & Missouri-Columbia.

Mathematics and Learning Disabilities

Abstract: Between 5% and 8% of school-age children have some form of memory or cognitive deficit that interferes with their ability to learn concepts or procedures in one or more mathematical domains. A review of the arithmetical competencies of these children is provided, along with discussion of underlying memory and cognitive deficits and potential neural correlates. The deficits are discussed in terms of three subtypes of mathematics learning disability and in terms of a more general framework for linking research in mathematical cognition to research in learning disabilities.

C. Elegans II

Abstract: Why should one study a worm? This simple creature is one of several “model” organisms that together have provided tremendous insight into how all organisms are put together. It has become increasingly clear over the past two decades that knowledge from one organism, even one so simple as a worm, can provide tremendous power when connected with knowledge from other organisms. And because of the experimental accessibility of nematodes, knowledge about worms can come more quickly and cheaply than knowledge about higher organisms.

The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary

Abstract: The Cretaceous-Paleogene boundary similar to 65.5 million years ago marks one of the three largest mass extinctions in the past 500 million years. The extinction event coincided with a large asteroid impact at Chicxulub, Mexico, and occurred within the time of Deccan flood basalt volcanism in India. Here, we synthesize records of the global stratigraphy across this boundary to assess the proposed causes of the mass extinction. Notably, a single ejecta-rich deposit compositionally linked to the Chicxulub impact is globally distributed at the Cretaceous-Paleogene boundary. The temporal match between the ejecta layer and the onset of the extinctions and the agreement of ecological patterns in the fossil record with modeled environmental perturbations (for example, darkness and cooling) lead us to conclude that the Chicxulub impact triggered the mass extinction.

The Material Values Scale: Measurement Properties and Development of a Short Form

Abstract: In recent years, a number of studies have used the material values scale (MVS) developed by Richins and Dawson ([1992][1]) to examine materialism as a facet of consumer behavior. This research examines the MVS in light of the accumulated evidence concerning this measure. A review of published studies reporting information about the scale and analysis of 15 raw data sets that contain the MVS and other measures revealed that the MVS performs well in terms of reliability and empirical usefulness, but the dimensional structure proposed by Richins and Dawson is not always evident in the data. This article proposes a 15-item measure of the MVS that has better dimension properties than the original version. It also reports the development of a short version of the MVS. Scale lengths of nine, six, and three items were investigated. Results indicate that the nine-item version possesses acceptable psychometric properties when used to measure materialism at a general level. This article also describes a psychometric approach for developing shorter versions of extant multiitem measures. [1]: #ref-15