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Visual cues have an important role in food preference for both rats and humans. Here, we aim to isolate the effects of numerosity, density, and surface area on food preference and running speed in rats, by using a forced-choice maze paradigm. In Experiment 1, rats preferred and ran faster for a group of multiple smaller pellets rather than a single large pellet, corroborating previous research (Capaldi, Miller, & Alptekin Journal of Experimental Psychology: Animal Behavior Processes, 15(1), 75–80, 1989). Further experiments tested the prevailing hypothesis that multiple food pieces are more reinforcing because they occupy a larger surface area. Experiment 2 controlled for numerosity by utilizing a continuous food: mashed potatoes flattened to cover a larger surface area or rounded into a ball. The rats preferred and ran faster for the flattened potatoes, suggesting surface area plays a role in quantity estimations. Finally, in Experiment 3, rats displayed no preference or difference in running speed between a group of scattered and clustered pellets when number of pellets were kept constant. Taken together, these results suggest that density has an important role in food perception—that is, the rewarding effect of higher numerosity or larger surface area is removed when the food does not fill out the entire space. Alternative explanations and implications for human diet are discussed. 相似文献
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R. G. Cochrane J. Elkins Dawn M. Richmond 《International Journal of Disability, Development & Education》1969,16(3):131-142
Three hundred and ninety‐nine Grade 4 Brisbane children were given a battery o1 general ability and achievement tests. Means and standard deviations allowed construction of 15‐point scales for a Queensland Grade 4. A correlation matrix included indices concerning sub‐tests of general ability and achievement tests. Comparisons with original A.C.E.R. co‐efficients were made. The matrix was factor sub‐tests of general ability and achievement tests. Comparisons with analysed and rotated, three factors emerging ‐‐ verbal, performance and computational. A canonical correlation was performed and three significant elements emerged ‐‐ a verbal, a computational (or integrative or automatic sequential) and a problem‐solving element. 相似文献
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A random sample of 1,000 Nationally Certified School Psychologists were mailed a 17‐item survey about treatment integrity. A total of 132 responded and answered questions about the importance of treatment integrity data for tiered interventions and the frequency and methods used to measure treatment integrity in one‐to‐one and problem‐solving team consultation. Ninety‐eight percent agreed that treatment integrity data were critical for tiered interventions. However, only 7% in one‐to‐one consultation and 0% in team consultation reported it was “always” collected. Respondents identified barriers of time, workload, system factors, and staff knowledge as explanations for why there was a gap between belief and practice. The participant responses were compared to those from a 2008 survey and found to be almost unchanged. Issues associated with decision‐making when treatment integrity data are lacking and recommendations for improving the assessment and reporting of treatment integrity are discussed. 相似文献
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Matthew John Barnes Ashley Petterson Darryl J. Cochrane 《Journal of sports sciences》2017,35(10):976-981
This study compared the effects of six warm-up modalities on peak power output (PPO) during the high-pull exercise. Nine resistance-trained males completed six trials using different warm-ups: high-pull specific (HPS), cycle, whole body vibration (WBV), cycle+HPS, WBV+HPS and a control. Intramuscular temperature (Tm) was increased by 2°C using WBV or cycling. PPO, Tm and electromyography (EMG) were recorded during each trial. Two high-pulls were performed prior to and 3 min after participants completed the warm-up. The greatest increase in PPO occurred with HPS (232.8 ± 89.7 W, P < 0.001); however, this was not different to combined warm-ups (cycle+HPS 158.6 ± 121.1 W; WBV+HPS 177.3 ± 93.3 W, P = 1.00). These modalities increased PPO to a greater extent than those that did not involve HPS (all P < 0.05). HPS took the shortest time to complete, compared to the other conditions (P < 0.05). EMG did not differ from pre to post warm-up or between modalities in any of the muscles investigated. No change in Tm occurred in warm-ups that did not include cycling or WBV. These results suggest that a movement-specific warm-up improves performance more than temperature-related warm-ups. Therefore, mechanisms other than increased muscle temperature and activation may be important for improving short-term PPO. 相似文献
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Ayalon Michal Wilkie Karina J. Eid Katrin Hajjar 《Educational Studies in Mathematics》2022,110(1):23-48
Educational Studies in Mathematics - Argu mentative problem solving in mathematics classrooms is a crucial practice that supports important student learning goals via collaborative deliberation and... 相似文献
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In schools, the notion of ‘care is often synonymous with welfare and disciplinary regimes. Drawing on Foucault, and a study of alternative education (AE) across the UK, and looking in depth at two cases of complementary AE, we identify three types of disciplinary regimes at work in schools: (1) dominant performative reward and punishment, (2) team-building and (3) therapeutic. We argue that while all three regimes aim to steer identified students back to the norm, the two complementary approaches that we saw avoided the narrow instrumental behaviourist approaches of the dominant pattern. In so doing, they also opened up wider horizons of possibility and ways to be and become. 相似文献