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1.
In two predictive-learning experiments, we investigated the role of the informational value of contexts for the formation of context-specific extinction learning. The contexts were each composed of two elements from two dimensions, A and B. In Phase 1 of each experiment, participants received acquisition training with a target cue Z in context A1B1 (the numbers assign particular values on the context dimensions). In Phase 2, participants were trained with conditional discriminations between two other cues, X and Y, for which only one of the two context dimensions was relevant. In a third phase, participants received extinction trials with cue Z in context A2B2. During a final test phase, we observed that a partial change of the extinction context disrupted extinction performance when the extinction context was changed on the dimension that had been trained as being relevant for the conditional discrimination. However, when the extinction context was changed on the irrelevant context dimension, extinction performance was not affected. Our results are consistent with the idea that relevant contexts receive more attention than do irrelevant contexts, leading to stronger context-specific processing of information learned in the former than in the latter type of contexts. 相似文献
2.
In two experiments, participants acquired one of two target configural discriminations (a biconditional or negative patterning
discrimination) in a predictive learning task. In Experiment 1, participants were pretrained with either a configural or an
elemental discrimination; in Experiment 2, they were pretrained with a configural discrimination, an elemental discrimination,
or a control discrimination that was not expected to bias them toward elemental or configural processing. In both experiments,
acquisition of the target configural discriminations was faster after configural pretraining than after elemental pretraining.
In addition, the negative patterning discrimination was acquired faster than the biconditional discrimination. Finally, the
results of Experiment 2 were more consistent with the notion that elemental pretraining hindered acquisition of the target
discriminations than with the notion that configural pretraining enhanced their acquisition. Implications of these findings
are discussed. 相似文献
3.
The advantage in learning after an intradimensional shift rather than an extradimensional shift has been widely used as a behavioural marker of attentional changes during discrimination learning in different fields of neuroscientific study. However, some of the factors assumed to guide these attentional changes have not been completely disentangled by previous research. In two predictive-learning experiments, we investigated the importance of stimulus relevance and of stimulus-outcome correlation for the modulation of attention. In each experiment, participants were trained on two discrimination problems given in successive order. Each problem required participants to differentiate stimuli varying on two dimensions. We found that acquisition of the second discrimination was influenced by whether its relevant dimension (Exp. 1) or its irrelevant dimension (Exp. 2) had previously been trained as relevant and uncorrelated or as irrelevant and uncorrelated. We also observed that acquisition of the second discrimination was independent of whether its relevant dimension (Exp. 1) or its irrelevant dimension (Exp. 2) had previously been trained as relevant and uncorrelated or as relevant and correlated. Our results indicated that the modulation of attention is guided by stimulus relevance and not by stimulus-outcome correlation. 相似文献
4.
Two experiments with human participants were used to investigate recovery of an extinguished learned response after a context change using ABC designs. In an ABC design, the context changes over the three successive stages of acquisition (context A), extinction (context B), and test (context C). In both experiments, we found reduced recovery in groups that had extinction in multiple contexts, and that the extinction contexts acquired inhibitory strength. These results confirm those of previous investigations, that multiple-context extinction can produce less response recovery than single-context extinction, and they also provide new evidence for the involvement of contextual inhibitory processes in extinction in humans. The foregoing results are broadly in line with a protection-from-extinction account of response recovery. Yet, despite the fact that we detected contextual inhibition, predictions based on protection-from-extinction were not fully reliable for the single- and multiple-context group differences that we observed in (1) rates of extinction and (2) the strength of context inhibition. Thus, although evidence was obtained for a protection-from-extinction account of response recovery, this account can not explain all of the data. 相似文献
5.
In a category-learning experiment, we assessed whether participants were able to selectively attend to different components of a compound stimulus in two distinct contexts. The participants were presented with stimulus compounds for which they had to learn categorical labels. Each compound comprised one feature from each of two dimensions, and on different trials the compound was presented in two contexts, X and Y. In Context X, Dimension A was relevant to the solution of the categorization task and Dimension B was irrelevant, whereas in Context Y, Dimension A was irrelevant and Dimension B was relevant. The results of transfer tests to novel stimuli suggested that people learned to attend selectively to Dimension A in Context X and Dimension B in Context Y. These findings contribute to the growing body of evidence that people can learn to selectively attend to particular dimensions of stimuli dependent on the context in which the stimuli are presented. Furthermore, the findings demonstrate that context-dependent changes in attention transfer to other categorization tasks involving novel stimuli. 相似文献
6.
The effects of two instructional strategies, visual display and contextual presentation, were investigated in the acquisition of electronic troubleshooting skills using computer-based instruction. Three types of visual displays (animation, static graphics with motion cues, and static graphics without motion cues) were used to represent structures and functions of electronic circuits and trouble-shooting procedures. The first hypothesis was that animation would be more effective than static graphics, but that static graphics with adequate motional cues representing the dynamic aspects of the task would accomplish results similar to animation. Results supported this hypothesis. The second hypothesis was that context-dependent instruction would be more efficient than context-independent instruction for solving problems in similar contexts, but that context independent instruction would be more effective in solving problems encountered in different contexts. The results supported this hypothesis. A general conclusion of this study is that the use of visual displays and contextual presentation should be based on the learning requirements of the task and the expected roles of the strategy in the learning.When this study was conducted, he was with the U.S. Army Research Institute. The opinions expressed herein are the author's and do not express or imply the views of the U.S. Department of Education or the U.S. Army Research Institute. 相似文献
7.
Research shows that multiple representations can enhance student learning. Many curricula use multiple representations across multiple task types. The temporal sequence of representations and task types is likely to impact student learning. Research on contextual interference shows that interleaving learning tasks leads to better learning results than blocked practice, but this research has not investigated whether it matters on which dimension we interleave learning tasks. Many educational materials include multiple task types and multiple representations. Should we interleave representations or task types? We conducted a classroom experiment to investigate the effects of interleaving task types (while blocking representations) and interleaving representations (while blocking task types). The participants (158 5th- and 6th-graders) worked with a corresponding version of an intelligent tutoring system for fractions. Our results show an advantage for interleaving task types over interleaving representations. These results extend prior work on contextual interference by showing that this effect is sensitive to the dimension being interleaved. We also extend the literature on learning with multiple representations by investigating the effect of interleaved practice with different representations. The results provide guidance to designers of complex curricula. 相似文献
8.
Rola Khishfe 《International Journal of Science Education》2013,35(17):2928-2953
The purpose of this study was to (a) investigate the effectiveness of explicit nature of science (NOS) instruction in the context of controversial socioscientific issues and (b) explore whether the transfer of acquired NOS understandings, which were explicitly taught in the context of one socioscientific context, into other similar contexts (familiar and unfamiliar) was possible. Participants were 10th grade students in two intact sections at one high school. The treatment involved teaching a six-week unit about genetic engineering. For one group (non-NOS group), there was no explicit instruction about NOS. For the other group (NOS group), explicit instruction about three NOS aspects (subjective, empirical, and tentative) was dispersed across the genetic engineering unit. A questionnaire including two open-ended scenarios, in conjunction with semi-structured interviews, was used to assess the change in participants’ understandings of NOS and their ability to transfer their acquired understandings into similar contexts. The first scenario involved a familiar context about genetically modified food and the second one focused on an unfamiliar context about water fluoridation. Results showed no improvement in NOS understandings of participants in the non-NOS group in relation to the familiar and unfamiliar contexts. On the other hand, there was a general improvement in the NOS understandings of participants in the NOS group in relation to both the familiar and unfamiliar contexts. Implications about the transfer of participants’ acquired NOS understandings on the basis of the distance between the context of learning and that of application are highlighted and discussed in link with the classroom learning environment. 相似文献
9.
Paul A. Mcdermott Marley W. Watkins Anna Rhoad Drogalis Jessica L. Chao Frank C. Worrell Tracey E. Hall 《Psychology in the schools》2016,53(6):626-640
Contextually based assessments reveal the circumstances accompanying maladjustment (the when, where, and with whom) and supply clues to the motivations underpinning problem behaviors. The Adjustment Scales for Children and Adolescents (ASCA) is a teacher rating scale composed of indicators describing behavior in 24 classroom situational contexts. This study examines the Trinidad and Tobago national normative process for the ASCA contextual dimensions with a representative sample of elementary school children (N = 900). Exploratory and confirmatory factor analyses yielded the same three dimensions (peer context problems, teacher context problems, and learning context problems) observed in U.S. national samples. Dimensions were scaled using item response theory (IRT) and Bayesian scoring methods, with peer and learning context problems scores relating more strongly to clinical behavior disturbances and learning context problems showing stronger association with classroom learning styles. Implications for future research and practice are discussed. 相似文献
10.
In three experiments, we investigated the contextual control of attention in human discrimination learning. In each experiment, participants initially received discrimination training in which the cues from Dimension A were relevant in Context 1 but irrelevant in Context 2, whereas the cues from Dimension B were irrelevant in Context 1 but relevant in Context 2. In Experiment 1, the same cues from each dimension were used in Contexts 1 and 2, whereas in Experiments 2 and 3, the cues from each dimension were changed across contexts. In each experiment, participants were subsequently shifted to a transfer discrimination involving novel cues from either dimension, to assess the contextual control of attention. In Experiment 1, measures of eye gaze during the transfer discrimination revealed that Dimension A received more attention than Dimension B in Context 1, whereas the reverse occurred in Context 2. Corresponding results indicating the contextual control of attention were found in Experiments 2 and 3, in which we used the speed of learning (associability) as an indirect marker of learned attentional changes. Implications of our results for current theories of learning and attention are discussed. 相似文献
11.
The deep versus surface learning approach dichotomy has dominated recent research in student learning approach dimensions. However, the achievement dimension may differ in importance in non-Western and vocational tertiary settings. The aim was to assess how Emirati tertiary students could be characterized in terms of their learning approaches. The study looked into emergent learning factors that may be important in Emirati students. The students were Emirati men in a first-year English for academic purposes programme at a tertiary college (N?=?252). The students completed the Revised Two-Factor Study Process Questionnaire (R-SPQ-2F) to determine learning orientation along the deep and surface approach dimensions. A factor analysis was carried out to assess emergent dimensions in the data. The results on the deep and surface dimensions were inconclusive. However, the factor analysis suggested a disposition towards a construct that we characterize as ‘attainment of satisfaction from learning’. In addition, the factor analysis suggested the possibility of the achieving domain emerging as a separate construct from the surface domain in this context, contrasting with previous research employing the R-SPQ-2F. The results suggest that the deep versus surface learning approach model may not sufficiently represent the complexity of student motivations and strategies in the current context. In addition, student affect tied to outcomes is discussed as an important though perhaps overlooked dimension in non-Western contexts. The implications of the results to future research are considered. 相似文献
12.
Rola Khishfe 《International Journal of Science Education》2019,41(9):1159-1180
It is important to question the generalizability of the knowledge about the nature of science (NOS), and thus know whether the knowledge about NOS can be transferred to various contexts. As such, the purpose of this study was to investigate whether students were able to transfer their acquired NOS understandings into contexts that vary in their similarity to the context of learning. Thirty-eight 7th grade students in two intact sections participated in the study. The treatment extended over seven weeks and involved teaching a unit about plate tectonics, earthquakes, and volcanoes. Only one of the two groups was explicitly taught about NOS in relation to the topics under study. To assess the change in students’ understandings of NOS and their ability to transfer these acquired understandings, a five-topic open-ended questionnaire and individual semi-structured interviews were used. Some of the questionnaire topics focused on scientific issues and were considered similar to the context of learning, while other topics were socioscientific and were considered less similar. Results showed that the transfer of participants’ acquired NOS understandings occurred when the context was similar to the context of learning and when the context was more familiar based on prior knowledge. Interpretations related to knowledge base schema, the distance between contexts, as well as the explicit teaching about transfer were discussed. 相似文献
13.
Recent evidence from this laboratory suggests that a context switch after operant learning consistently results in a decrement in responding. One way to reduce this decrement is to train the response in multiple contexts. One interpretation of this result, rooted in stimulus sampling theory, is that conditioning of a greater number of common stimulus elements arising from more contexts causes better generalization to new contexts. An alternative explanation is that each change of context causes more effortful retrieval, and practice involving effortful retrieval results in learning that is better able to transfer to new situations. The current experiments were designed to differentiate between these two explanations for the first time in an animal learning and memory task. Experiment 1 demonstrated that the detrimental impact of a context change on an instrumental nose-poking response can be reduced by training the response in multiple contexts. Experiment 2 then found that a training procedure which inserted extended retention intervals between successive training sessions did not reduce the detrimental impact of a final context change. This occurred even though the inserted retention intervals had a detrimental impact on responding (and, thus, presumably retrieval) similar to the effect that context switches had in Experiment 1. Together, the results suggest that effortful retrieval practice may not be sufficient to reduce the negative impact of a context change on instrumental behavior. A common elements explanation which supposes that physical and temporal contextual cues do not overlap may account for the findings more readily. 相似文献
14.
Katherine S. Binder Kathryn H. Chace Mary Claire Manning 《Journal of Research in Reading》2007,30(4):360-378
In a series of three experiments, we examined how sentential and discourse contexts were used by adults who are learning to read compared with skilled adult readers. In Experiment 1 , participants read sentence contexts that were either congruent, incongruent or neutral with respect to a target word they had to name. Both skilled and less skilled adults benefited from a congruent context, and were not disadvantaged by an incongruent context. Contrary to research conducted on children learning to read, skill level of the adult reader did not interact with context. Experiments 2 and 3 tested readers' ability to make predictive inferences. Again, all readers, regardless of skill level, provided evidence that they were making predictive inferences. This finding is inconsistent with research that has examined individual differences in college readers. 相似文献
15.
Gwen A. Frishkoff Kevyn Collins-Thompson Leslie Hodges Scott Crossley 《Reading and writing》2016,29(4):609-632
The present study asked whether accuracy feedback on a meaning generation task would lead to improved contextual word learning (CWL). Active generation can facilitate learning by increasing task engagement and memory retrieval, which strengthens new word representations. However, forced generation results in increased errors, which can be detrimental for learning if they are not corrected. The goal of this study was to determine whether immediate feedback on response accuracy would ameliorate this risk. The study was conducted using an intelligent tutoring system, which presents target words in multiple contexts and prompts users to generate a target word meaning after each context. One group of participants (feedback group) received immediate feedback based on Markov Estimation of Semantic Association (MESA), which estimates the distance between the learner response and the target word meaning. The control group did not receive feedback. Results from conventional (pre/post-test) measures showed greater gains in accuracy and confidence for the feedback group. Moreover, when contextual support was decreased mid-way through the training (from trial 3 to trial 4), MESA measures showed a corresponding drop in accuracy, but only for the No-Feedback group. These findings suggest that accuracy feedback can improve outcomes in CWL, particularly when there is an increased risk of errors. This strengthens the case for meaning generation as a tool to build high-quality lexical representations. 相似文献
16.
Sebastian Habig Janet Blankenburg Helena van Vorst Sabine Fechner Ilka Parchmann Elke Sumfleth 《International Journal of Science Education》2018,40(10):1154-1175
ABSTRACTMany studies in science education acknowledge the positive effects of context-based learning on students’ interest and attitudes. However, little is known about the design criteria of contextual situations generating these effects and how facets of students’ situational interest are affected while learning in a contextualised setting. This paper ties in with this initial situation and reports results of two projects analysing the influence of context characteristics on students’ situational interest, referring to contexts as task parameters in the first project and as learning activities in the second. In the first project, everyday related and unique contexts are compared, and the effects of different contextual topics on student learning are investigated. Particularly, regarding the feeling- and value-related valence of situational interest, the results of different studies will be compared and interpreted. The second project investigated structures of interest related to activities along an adapted version of the ‘RIASEC’-model for different content areas and age groups. The chosen contents were embedded in personal as well as societal and professional context settings. Finally, we summarise the relevance of the different models, results and instruments to better understand different notions of interest and outline implications for further studies about teaching that improves student learning. 相似文献
17.
CSCL环境中的社会交互 总被引：3，自引：0，他引：3
现在有很多关于计算机支持下协作学习(CSCL)异步环境中分布式学习团体(DLGs)的实证研究。研究表明当前的CSCL环境并不能完全满足人们对其支持交互的团体学习、知识共享、知识的社会建构及能力的培养的需要。在CSCL环境中,主要有两个因素阻碍我们取得预期的社会交互的成果:一是将社会交互看作是自然而然发生的,二是忽视与学习任务本身无关的社会心理交互。当前解决这个问题的办法主要是依靠教育者和教师鼓励协作学习,为了让教师从这样的负担中解脱出来,我们必须改进CSCL环境,激发和支持学习者的社会交互。 相似文献
18.
Two experiments were run in order to investigate the influence of external contextual cues on the interaction between two conflicting memories. Rats were trained, in the same apparatus, on a passive-avoidance task and, 10 min later, on an active-avoidance task, then submitted to a 24-h delayed test (without reinforcement). When contextual cues remained unchanged throughout these three phases, the animals exhibited proactive interference, as shown by longer response latencies than those of control animals that had learned only the active-avoidance task (Experiment 1). When training contexts were made slightly different from one task to the other (by the presence of a continuous tone during either the first or the second task), the animals behaved at subsequent testing in accordance with the response contingencies present in the context exactly similar to the test context; this control of behavior by testing context was demonstrated both when the tone was absent (Experiments 1 and 2) and present (Experiment 2) at testing. A cuing procedure—a 90-sec exposure to the tone in the experimental room 5 min prior to testing—led the animals to behave in accordance with the response previously acquired in the presence of the tone (Experiments 1 and 2), exactly in the same way as animals tested in the presence of the tone (Experiment 2). The same cuing treatment was ineffective when administered 1 h before testing (Experiment 2). These results are interpreted in terms of a dual function of contextual cues at the time of retrieval: the general contextual information present during testing or during pretest cuing is assumed to induce concurrent reactivation of both memories. Consequently, the experimentally manipulated contextual cue (the tone) would have a discriminative function, leading the animals to choose between the two equally available representations. 相似文献
19.
Much of the work in the Learning Sciences and Computer-Supported Collaborated Learning communities have focused on understanding and designing for learning in collaborative spaces. This work utilizes methods such as Interaction Analysis and has attended to multiple dimensions and timescales of learning. It has redefined ideas about knowledge and competence and how they are acquired, thus providing important insights into the process of learning and the design of learning environments. However, we have not in the same way advanced our knowledge of teacher learning. Our understanding of the process and mechanism of teacher learning in in collaborative professional development (PD) environments is still quite thin. In this paper, we discuss how utilizing methods from Interaction Analysis, in particular, can offer insight into the process of teacher learning in these contexts. We illustrate how adopting a lens that shifts away from asking whether teachers are progressing toward a researcher-defined goal, toward one that asks how learning occurs in the moments of interaction, and the meaning it has for participants as they work to achieve PD goals, has the potential to shed new light on learning in teacher PD. 相似文献
20.
We investigated the effect of associating unique contextual cues with an interpolated learning task on retroactive interference in long-term memory. Rats were originally trained in a two-bar operant chamber with an auditory conditional discrimination stimulus. During interpolated learning, which occurred in either the original or a new context, some rats were trained on a probability learning task that did not include the auditory stimuli present during original learning. Subsequent retraining on the original conditional discrimination task in the original context showed that (1) significant retroactive interference occurs in rats, and (2) the presence of unique contextual cues during interpolated learning significantly reduces this interference. These results extend the conditions under which the susceptibility to retroactive interference can be altered by contextual cues. 相似文献