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841.
Klaus Libertus Kelly A. Sheperd Samuel W. Ross Rebecca J. Landa 《Child development》2014,85(6):2218-2231
Atypical motor behaviors are common among children with autism spectrum disorders (ASD). However, little is known about onset and functional implications of differences in early motor development among infants later diagnosed with ASD. Two prospective experiments were conducted to investigate motor skills among 6‐month‐olds at increased risk (high risk) for ASD (N1 = 129; N2 = 46). Infants were assessed using the Mullen Scales of Early Learning (MSEL) and during toy play. Across both experiments, high‐risk infants exhibited less mature object manipulation in a highly structured (MSEL) context and reduced grasping activity in an unstructured (free‐play) context than infants with no family history of ASD. Longitudinal assessments suggest that between 6 and 10 months, grasping activity increases in high‐risk infants. 相似文献
842.
Previous research suggests that presenting redundant nonverbal semantic information in the form of gestures and/or pictures may aid word learning in first and foreign languages. But do nonverbal supports help all learners equally? We address this issue by examining the role of gestures and pictures as nonverbal supports for word learning in a novel (e.g. original/pretend) language in a sample of 62 preschoolers who differ in language abilities, language background, and gender. We tested children’s ability to learn novel words for familiar objects using a within-subjects design with three conditions: word-only; word + gesture; word + picture. Children were assessed on English translation, immediate comprehension and follow-up comprehension 1 week later. Overall performance on the tasks differed by characteristics of the learners. The importance of considering the interplay between learner characteristics and instructional strategies is discussed. 相似文献
843.
844.
David A. Grimaldi Alexander Shedrinsky Andrew Ross Norbert S. Baer 《Curator: The Museum Journal》1994,37(4):251-274
The appeal of ancient fossilized tree resin, or amber, has made pieces with animal and plant inclusions particularly prized. Unfortunately, amber forgeries are more convincingly and routinely made than most other kinds of fossils, by embedding organisms in natural resins (e.g., copal) or synthetic resins (especially polyester) or by filling a carved niche in a natural piece of amber with resin and a modern inclusion. The confusion of organisms in copal (forged and natural) for ones in amber has a long history. Reviewed here are simple tests for discerning forgeries and natural inclusions in both substances. We discuss an old but sophisticated technique for crafting amber forgeries from authentic amber and present several new examples from old collections in two large museum collections. Also discussed is the widespread use of polyester resin forgeries in the Dominican Republic and Mexico. 相似文献
845.
Lawrence E. Ross Katie P. Desiderio Michael Knudstrup Michael G. Frino 《Performance Improvement Quarterly》2014,26(4):53-73
Identifying antecedents of salesperson performance is a long‐standing objective in the sales management research field. The purpose of this article is to outline how the practical understanding of, and the willingness to embrace, sales employees' cultural value‐systems adds value while considering performance drivers, individualistic versus collectivistic values, and performance outcomes. The cultural dimensions under consideration, individualism and collectivism, cannot be approached as a dichotomy. As is the case for all cultural dimensions, they represent a continuum and not absolutes. In this study, the work preferences and predispositions of participants were compared using an international data set. Respondents were culturally classified based on research (i.e., Americans and Australians as individualists and Japanese and South Koreans as collectivists). Specifically, it was found that individualists were less attached to their current work situation; collectivists indicated less work/family conflict; and individualists valued independent work more while collectivists valued deciding work time. This is important because of the need to understand how to effectively connect with the values of people to encourage positive performance outcomes. The reality is that value holds differing degrees of emphasis; the performance formula is the theoretical framework to guide this research. The implications of the results for sales management professionals are discussed. 相似文献
846.