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81.
82.
The problem was to determine how rats adjust the times of their lever responses to repeating sequences of interfood intervals. In Experiment 1, rats were trained on an interval schedule of reinforcement with a 12-element Fleshler-Hoffman series with a mean of 60 sec; the order was as follows: ascending, random with repetition, random with replacement, random without replacement. In Experiment 2, rats were trained with a 10-element ascending or descending series (from 20 to 29 sec), and in a ramp procedure in which these intervals increased and then decreased repeatedly. In the ascending, descending, and ramp conditions (but not in the random conditions), postreinforcement pause (PRP) was a function of the interval. PRP was most highly correlated with an interval later in the series. Theories of conditioning and timing based on the averaging of past experience must be modified to account for such anticipatory behavior. 相似文献
83.
Russell Tytler Vaughan Prain George Aranda Joseph Ferguson Radhika Gorur 《科学教学研究杂志》2020,57(2):209-231
Despite mixed results in research on student learning from drawing in science, there is growing interest in the potential for this visual mode, in tandem with other modes, to enact and enable student reasoning in this subject. Building on current research in this field, and using a micro-ethnographic approach informed by socio-semiotic perspectives, we aimed to identify how and why student drawing can contribute to student reasoning and learning. In our study, secondary school students were challenged to explore and collaboratively create explanatory representations of phenomena including through drawing. Data were generated using multiple wall- and ceiling-mounted cameras capable of continuously tracking groups of students negotiating these representational challenges. Our analysis proceeded through active and iterative viewing of the extensive video record, and the identification of themes to establish possible relationships between drawing and reasoning. Through this process, we (a) identify multiple necessary conditions and varied opportunities for student drawing to enact and enable reasoning, and (b) extend current understandings of how the particular affordances of this mode interact with these conditions to contribute to student learning in science. 相似文献
84.
85.
In this column, a father and a mother each share their unique version of their son''s natural birth. 相似文献
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87.
As the number of young children displaying challenging behavior in early childhood grows, so too does the need to implement
evidence-based practices that prevent challenging behavior. Positive Behavior Support (PBS) provides a framework of tiered
interventions focused on promoting social-emotional development and preventing challenging behavior. This study investigated
the effects of consultation on teachers’ implementation of universal PBS practices and children’s academic engagement. A multiple-baseline
design was applied across four preschool classrooms serving children from 33 to 63 months of age. A strong relationship was
documented between consultation and teachers’ implementation of PBS skills. High levels of academic engagement were maintained
following consultation. Implications of the results are provided for applications of universal PBS practices in early childhood
settings. 相似文献
88.
The development of talented athletes is a priority for many countries across the world, including China. A validated Chinese 5-factor Talent Development Environment Questionnaire (TDEQ-5) would go some way in helping researchers and practitioners investigate talent development systems within China from an evidence-based perspective. For this purpose, the 25-item English TDEQ-5 was translated to Chinese through a standardised process. The translated scale was then administered to 538 talented Chinese youth athletes. Confirmatory factor analysis revealed adequate model fit of the scale. The internal reliability, concurrent and discriminant validity, and test–retest reliability of the scale were adequately supported. The scale was also invariant across gender. It is recommended that the Chinese TDEQ-5 can be used with confidence in both applied and research settings. 相似文献
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90.
This paper discusses one aspect of competitive youth team soccer in the US: the tension between loyalty and success. Teams use rituals to encourage parents and players to place loyalty to the team over individual goals and self-interest. But competitive teams value team success over loyalty to its players. And youth learn to place self-interest over loyalty to the team, even at the cost of friendships. This becomes an important lesson for youth in a competitive economic system, where success in adulthood is often defined in economic terms. Thus, competitive youth soccer reproduces an upper-middle-class habitus familiar to many of the families that participate in youth sports in the US. The pursuit of desirable careers typically demands geographic mobility and the routine abandonment of significant others. It is a taken for granted aspect of the upper middle-class worldview, learned at a young age in competitive team sports such as soccer. 相似文献