The CS− effect in simple conditioning and stimulus selection during development

Changes in affect toward a particular stimulus can take place very rapidly through Pavlovian conditioning, if presentation of the conditioned stimulus (CS+) paired with the unconditioned stimulus (US) is accompanied by presentation of a “CS?,” another value of the same dimension as the CS+ but not paired with a US. This effect has considerable generality. It has been observed in terms of both olfactory and visual CSs, in terms of appetitive as well as aversive conditioning, and for adult as well as infant rats. The CS? effect has seemed especially important for infants, which may be related to the general tendency for infants to exhibit less stimulus selection than older animals. Finally, the CS? effect has enabled the development of a simple test of short-term retention that can quite effectively assess memory for either incidental or target events. These tests so far have indicated a clear ontogenetic decrease in rate of forgetting over short intervals, corresponding to the well-known development-related decrease in forgetting over long intervals (infantile amnesia). The tests also have shown that short-term forgetting of intentional and target events is surprisingly similar, with some indication of more rapid forgetting for the incidental events. Alternative interpretations of the CS? effect and some preliminary tests of these interpretations are discussed.     

Simians in the Shape School: A comparative study of executive attention

Executive functions (EF) have been studied extensively in children and adults. However, EF tasks for young children can be difficult to administer and interpret. Espy (1997, Developmental Neuropsychology, 13, 495–499) designed the Shape School task to measure inhibition and switching in preschool-aged children. Shape School presents cartoon-like characters that children must flexibly name by their color, their shape, or both, depending on cues that indicate the appropriate rule. Shape School has been found to be age sensitive as well as predictive of performance on other EF tasks. We presented a computerized analogue of Shape School to seven rhesus macaques. Monkeys were trained to categorize characters by color or shape, or to inhibit this response, depending on whether the characters had eyes open, eyes closed, or wore hats. Monkeys performed above chance on the inhibition and switching components of the task. Long runs of a single classification rule and long runs of noninhibition trials had no significant impact on performance when the rule changed or inhibition was required. This nonverbal adaptation of Shape School can measure EF in nonhuman animals and could be used in conjunction with other EF tasks to provide a clearer picture of both human and nonhuman executive functions.     

The credibility of online news: an evaluation of the information by university students / La credibilidad de las noticias en Internet: una evaluación de la información por estudiantes universitarios

Abstract

The spread of online disinformation is one of the 10 global risks of the future according to the World Economic Forum, and 51% of experts believe that this situation will not improve in the coming years. By 2022, half of the news will be fake news. In terms of users, young people and adults have problems understanding where the information they find online comes from and what sources to trust or not. In order to ascertain the degree of credibility that young users in Andalucía give to information, this study presents the results of the evaluation of online news by university students pursuing degrees in communication and education (N = 188), using the CRAAP test. The data reveal differences in gender and degree programme in the credibility assigned to the news. The conclusion is that university students have difficulty differentiating the veracity of the sources, in line with previous studies, with fake news earning higher ratings than real news.     

Activity Theory,Mediated Action and Literacy: Assessing how children make meaning in multiple modes

The paper reports a study into children's literacy in Bangladesh. It presents reading and writing profiles of a stratified random sample of ten year-old children. The paper argues that while these profiles might be a valuable source of information for the Government of Bangladesh as well as for the international donor community, especially in that they provide diagnostic information of children's literacy development, they do not portray fully the potential of children as meaning-makers. A small number of children from those who performed poorly in assessments of reading and writing were subjected to a further study in which they participated in a 'designing and making' activity. Here, the multiple modes through which children communicated meaning and understanding became the focus of the assessment. This means that we did not look solely at the linguistic mode but focused also on 'mediated action' as a mode through which meaning is made. Thus the potential of children to represent meaning and to create and shape 'new' texts through collaborative engagement with each other, as well as with the material and linguistic resources being used in the activity, became the prime focus of assessment. The paper shows that children who performed poorly on tests of reading and writing were potentially creative meaning-makers when other modes of representation like action and speech were considered. The paper concludes that large-scale studies of children's literacy are necessary and will continue to provide important sources of information for governments attempting to alleviate poverty and create equitable access to education and other social services. On the other hand, data obtained in this fashion mask the potential of children as creative meaning-makers. The study reported here shows that teacher-based assessment, expanded to recognise modes of meaning-making other than language, can be a vital, additional source of information for those interested in children as learners.     

俚语和成语,让你走出英语学习的黑暗

[接上期]Is Slang Only Used By The Lower Classes?“Absolutely not!”Itellmy internationalstudents. There is universal slang that is used by everyone. However, there are many subcategories of slang used by specific groups. Slang can be seen as a family tree with universal slang at the top representing words that are not only used consistently in the media, but by virtually everyone.