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四则混合运算规则的样例学习 总被引:7,自引:2,他引:5
采用有或无“运算步骤标记”两种样例和“交互式”样例呈现方式,对48名二年级小学生通过样例学习四则混合运算规则进行了实验。结果表明,多数被试可以通过样例学会“小括号”和“中括号”四则混合运算规则,但多数被试难以学会“无括号”四则混合运算规则;运算步骤标记对学习“无括号”运算规则的促进作用明显,但对学习“小括号”运算规则的促进作用不明显;运算规则学习的难度不同,所需样例的数量也不同。 相似文献
255.
Junyi Chu Pierina Cheung Rose M. Schneider Jessica Sullivan David Barner 《Cognitive Science》2020,44(8):e12875
By around the age of 5½, many children in the United States judge that numbers never end, and that it is always possible to add 1 to a set. These same children also generally perform well when asked to label the quantity of a set after one object is added (e.g., judging that a set labeled “five” should now be “six”). These findings suggest that children have implicit knowledge of the “successor function”: Every natural number, n, has a successor, n + 1. Here, we explored how children discover this recursive function, and whether it might be related to discovering productive morphological rules that govern language-specific counting routines (e.g., the rules in English that represent base-10 structure). We tested 4- and 5-year-old children’s knowledge of counting with three tasks, which we then related to (a) children’s belief that 1 can always be added to any number (the successor function) and (b) their belief that numbers never end (infinity). Children who exhibited knowledge of a productive counting rule were significantly more likely to believe that numbers are infinite (i.e., there is no largest number), though such counting knowledge was not directly linked to knowledge of the successor function, per se. Also, our findings suggest that children as young as 4 years of age are able to implement rules defined over their verbal count list to generate number words beyond their spontaneous counting range, an insight which may support reasoning over their acquired verbal count sequence to infer that numbers never end. 相似文献
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公民情感的法律确认是基于公民行为选择中两难困境的应对之策。这一立法实践有其学理和历史的依据。将公民情感的法律确认纳入立法伦理的视域,将不仅有助于良法的创制,而且还因其逻辑地排除了司法活动的情感障碍和为公民奠定了守法的情感基础而有利于良法的有效实现。 相似文献
257.
Allison Astorino-Courtois 《Political psychology》2000,21(3):489-509
Decision research demonstrates that individuals adapt decision processing strategies according to the characteristics of the decision task. Unfortunately, the literature has neglected task factors specific to foreign policy decisions. This paper presents experimental analyses of the effects of the decisional stakes (i.e., salience of the values at issue) and threat (risk of loss on those issues) on decision-makers' information acquisition patterns and choice rules with respect to one of four hypothetical foreign policy scenarios. Contrary to the notion that normative (rational) decision-making is more likely in less dramatic settings, the results indicate that elevated threat encourages rational decision processing, whereas heuristic processing was more prevalent in less threatening situations. Interestingly, the added presence of high stakes magnified both threat effects. These results, although preliminary, suggest that stakes-threat effects are not direct reflections of stress and/or complexity effects, but should be considered independently in foreign policy analyses. 相似文献
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精诚合一:医学哲学事业的永恒主题 总被引:2,自引:0,他引:2
张金钟 《医学与哲学(人文社会医学版)》2000,21(10):29-32
医学哲学事业的价值在于发现并弘扬医学的基本精神。“精诚合一”是医学亘古不变的基本精神。当代医学哲学研究的任务是揭示医学的“精诚合一”特征及其深刻内涵,注重“精”与“诚”的有机结合,批判现实医疗活动和理论研究在“精”、“诚”问题上的片面,弘扬医学的基本精神。 相似文献
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The increasing ties between psychology and law have familiarized psychologists with the standards by which law admits scientific evidence into the courtroom. In the USA, these include the general acceptance standard and the Daubert guidelines and, in the UK, the Turner Rule. However, the psychological literature has largely failed to make clear the degree of legal debate that exists concerning the clarity and effectiveness of such standards. This paper will focus on the general acceptance standard, examining key problems of this standard and placing them in a specifically psychological context. Such consideration is important precisely because the standard has become so well known within the psychological literature and because insufficient attention has been given to the way in which it operates implicitly within jurisdictions outside the USA. The authors argue that it is the responsibility of psychologists to become more involved in the debate concerning admissibility standards, given the credibility and authority that law accords to psychology when admitting it into the courtroom. In particular, psychologists need to become more self-reflective about their role in creating and maintaining such standards. © 1998 John Wiley & Sons, Ltd. 相似文献
260.