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This field experiment examined the main and interactive effects of self-efficacy and feedback (i.e. the use of feedback versus no feedback) on performance in a speed reading class. Results showed that the provision of feedback was beneficial to the performance of all subjects, however as subject self-efficacy increased, the beneficial effects of feedback to the subject's performance also increased. Subjects who received feedback on their performance experienced significantly greater increases in self-efficacy than subjects who received no feedback. The more positive the performance feedback received, the greater the increase in individual self-efficacy. The implications of these results for training programs are discussed. 相似文献
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Howard I. Browman Jeannette Yen David M. Fields Jean-François St-Pierre Anne Berit Skiftesvik 《Marine Biology》2011,158(12):2653-2660
Paraeuchaeta norvegica (8.5 mm total length) and yolk-sac stage Atlantic cod larvae (4 mm total length) (Gadus morhua) larvae were observed in aquaria (3 l of water) using silhouette video photography. This allowed direct observations (and
quantitative measurement) of predator–prey interactions between these two species in 3-dimensions. Tail beats, used by cod
larvae to propel themselves through the viscous fluid environment, also generate signals detectable by mechanoreceptive copepod
predators. When the prey is close enough for detection and successful capture (approximately half a body-length), the copepod
launches an extremely rapid high Reynolds number attack, grabbing the larva around its midsection. While capture itself takes
place in milliseconds, minutes are required to subdue and completely ingest a cod larva. The behavioural observations are
used to estimate the hydrodynamic signal strength of the cod larva’s tail beats and the copepod’s perceptive field for larval
fish prey. Cod larvae are more sensitive to fluid velocity than P. norvegica and also appear capable of distinguishing between the signal generated by a swimming and an attacking copepod. However, the
copepod can lunge at much faster velocities than a yolk-sac cod larva can escape, leading to the larva’s capture. These observations
can serve as input to the predator–prey component of ecosystem models intended to assess the impact of P. norvegica on cod larvae. 相似文献
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Francesca Romana Grati Denise Molina Gomes Jose Carlos Pinto B. Ferreira Celine Dupont Viola Alesi Laetitia Gouas Nina Horelli-Kuitunen Kwong Wai Choy Sandra García-Herrero Alberto Gonzalez de la Vega Krzysztof Piotrowski Rita Genesio Gloria Queipo Barbara Malvestiti Bérénice Hervé Brigitte Benzacken Antonio Novelli Philippe Vago Kirsi Piippo Tak Yeung Leung Federico Maggi Thibault Quibel Anne Claude Tabet Giuseppe Simoni François Vialard 《黑龙江环境通报》2015,35(8):801-809
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