Children acquire the later‐greater principle after the cardinal principle

Many have proposed that the acquisition of the cardinal principle (CP) is a result of the discovery of the numerical significance of the order of the number words in the count list. However, this need not be the case. Indeed, the CP does not state anything about the numerical significance of the order of the number words. It only states that the last word of a correct count denotes the numerosity of the counted set. Here, we test whether the acquisition of the CP involves the discovery of the later‐greater principle – that is, that the order of the number words corresponds to the relative size of the numerosities they denote. Specifically, we tested knowledge of verbal numerical comparisons (e.g., Is ‘ten’ more than ‘six’?) in children who had recently learned the CP. We find that these children can compare number words between ‘six’ and ‘ten’ only if they have mapped them onto non‐verbal representations of numerosity. We suggest that this means that the acquisition of the CP does not involve the discovery of the correspondence between the order of the number words and the relative size of the numerosities they denote.     

Retrospective revaluation in humans: Learning or memory?

The phenomenon of retrospective revaluation has posed considerable problems for many associative learning theories as it involves a change in the associative strength of a cue on trials on which that cue is absent. The present series of experiments pursues this idea of changes in associative strength between evoked representations of cues, in an effort to establish, de novo, an excitatory connection between two cues simultaneously activated in memory. Given the finding of Dwyer, Mackintosh, and Boakes (1998) that simultaneous activation of absent cues in the memory of rats resulted in learning comparable to that seen inretrospective revaluation, we expected that if retrospective revaluation was found in humans, then excitatory learning due to simultaneous activation would also be seen. This was not the case. The implications of our results are discussed in terms of Dickinson and Burke's (1996) modified SOP model and a version of McLaren's (1993) APECS network. We conclude that many of the effects attributed to learning in retrospective revaluation studies are better thought of as due to changes in the retrievability of items in memory.     

Experience of traumatic events and personal myths of birth

ABSTRACT

Focusing on the analysis of a clinical case, this article studies the manner in which certain traumatic events can induce some individuals to produce auto-traumatic processes. In parallel, it demonstrates how the foundations of a subject’s origins can, at an early stage, find themselves undermined by an environment that does not recognise the subject, and that sends out messages that seem to exclude him or her from their filiation. What can follow is a partial breakdown in the ideation of origins that leads some individuals to create a personal myth of birth. This myth, that borrows some elements from collective myths, can to some extent substitute itself for the representation of filiation. This process will be differentiated here from delusional phenomena, or the ‘sexual theories of children’. This article also demonstrates the important role of the analysis of ‘anxiety dreams’ in these traumatic configurations: this analysis has the power to bring to light the different conflicting elements with which the ego identifies, so as to put an end to the auto-traumatic process, as well as giving clues for lifting the amnesia regarding a childhood personal myth of birth. Under these conditions ‘acts of birth’ can become inscribed into the analysis.     

Less is more: The availability heuristic in early childhood

This study examined whether young children are influenced by the subjective experience associated with an easy or difficult recall when making memory decisions. Seventy‐one children, aged 4, 6, and 8 years, were asked to generate either a small (easy condition) or large (hard condition) number of first names. Statistical analyses revealed that participants in the hard condition were more likely to infer that they did not know many names than participants in the easy condition, contrary to what would be expected if children based their memory judgement on the objective number of recalled items. Overall, our results support the hypothesis that children as young as 4 years old rely on the subjective experience of ease to regulate their decision‐making processes. Theoretical implications of these findings are discussed.     

Effects of Communication Expectancies,Actual Communication,and Expectancy Disconfirmation on Evaluations of Communicators and Their Communication Behavior

The current investigation addressed (a) the perseverance of preinteraction expectancies in the face of actual communication behavior, (b) the separate effects of personal attribute and communication expectancies, and (c) the role of expectancy confirmation or disconfirmation on postinteraction evaluations. Participant perceivers were induced to hold positive or negative expectancies regarding a target partner's general personal attributes and specific communication behavior prior to a problem-solving discussion. They then interacted with a confederate target who communicated in a pleasant, involved fashion or its opposite, after which perceivers evaluated target personal attributes and communication behavior. All three hypotheses received at least partial support. Preinteractional expectancies, especially personal attribute ones, caused perceivers to evaluate targets and their communication behavior differently, with negatively valenced expectancies serving as negative violations. Relative to a pleasant, involved communication style, unpleasant, uninvolved communication was less expected and evaluated negatively, thus functioning as a negative violation; it also reduced credibility, attraction, and perceived rewardingness of the target. Finally, disconfirmatory communication altered target evaluations relative to confirmatory communication, especially for high-valence targets. These results lend support to the premises and predictions of expectancy violations theory.     

西北某高校教职工2009年至2012年恶性肿瘤发病分析

为了解某高校教职工恶性肿瘤发病情况与流行特征,分析2009年~2012年恶性肿瘤报告资料,计算发病率、标化发病率、标准截缩率、累积率等指标.结果四年教职工恶性肿瘤平均发病率 308.9/10万,标化发病率222.3/10万.男性以肺癌、结直肠癌、前列腺癌、胃癌、肝癌、肾癌多见;女性以乳腺癌、肺癌、肝癌、结直肠癌、胃癌、膀胱癌为主.因此,高校教职工恶性肿瘤防治工作的重点应放在40岁以上人群,加强肺癌、乳腺癌、结直肠癌及前列腺癌防治研究具有重要意义.