Effects of disfluency and test expectancy on learning with text

Do students learn better with texts that are Open image in new window (i.e., disfluent)? Previous research yielded discrepant findings concerning this question. To clarify these discrepancies, the present study aimed at identifying a boundary condition that determines when disfluent text is, and is not, beneficial to learning. This boundary condition is knowledge about whether a test will follow (high test expectancy) versus not (low test expectancy). Participants with high test expectancy may already engage in effortful processing, so that making text harder-to-read (disfluent) might not change their processing mode any further. Thus, particularly when no test is expected, disfluency is supposed to exert its beneficial effect. This assumption was tested in a 2?×?2 design (N?=?97) with text legibility (fluent vs. disfluent) and test expectancy (low vs. high) as factors, and learning outcomes (retention, transfer) and learning times as main dependent variables. Results revealed that high test expectancy led to better learning outcomes (for retention and transfer), but disfluent text did not. Unlike expected, there was no interaction between the two factors. Moreover, both high test expectancy and disfluency led to longer learning times, resulting in a lower efficiency when learning with disfluent compared to fluent text. Hence, the present results further question the stability and generalizability of a positive disfluency effect on learning, because only high test expectancy – but not disfluency - stimulated better learning through more effortful processing the way it was supposed to.     

Fortune is fickle: null-effects of disfluency on learning outcomes

Recently, Diemand-Yauman et al. Cognition, 118, 114–118 (2011) demonstrated that learning with disfluent (hard-to-read) materials is more effective than learning with easy-to-read materials – a study that has since stipulated a number of follow-up studies (with mixed results). However, there is a potential confound in the original experiments: The disfluent materials were not only disfluent but also rather unusual. Therefore, they might have been particularly distinctive and have attracted more attention, which then resulted in better learning. We conducted three experiments to address this confound, all of them slightly modified replications of Diemand-Yauman et al.’s Experiment 1. Participants received five lists, either at their own pace on a computer screen (Experiment 1) or experimenter-paced on paper (Experiments 2 & 3). In Experiments 1 and 2, participants either received one fluent and four disfluent lists or they received four fluent lists and one disfluent list. The position of the distinct list varied across participants. In Experiment 3, the distinct list was always the penultimate one. In none of the experiments, learning performance was affected by any of the experimental manipulations. Our results question the generality of the disfluency effect with respect to learning.     

Varieties of perceptual learning

Although most studies of perceptual learning in human participants have concentrated on the changes in perception assumed to be occurring, studies of nonhuman animals necessarily measure discrimination learning and generalization and remain agnostic on the question of whether changes in behavior reflect changes in perception. On the other hand, animal studies do make it easier to draw a distinction between supervised and unsupervised learning. Differential reinforcement will surely teach animals to attend to some features of a stimulus array rather than to others. But it is an open question as to whether such changes in attention underlie the enhanced discrimination seen after unreinforced exposure to such an array. I argue that most instances of unsupervised perceptual learning observed in animals (and at least some in human animals) are better explained by appeal to well-established principles and phenomena of associative learning theory: excitatory and inhibitory associations between stimulus elements, latent inhibition, and habituation.     

The role of comparison in perceptual learning: effects of concurrent exposure to similar stimuli on the perceptual effectiveness of their unique features

In three experiments, rats were given concurrent exposure to a compound flavor (AX) and to one of the elements of the compound (X). The perceptual effectiveness of A was then assessed by a test involving generalization of a conditioned aversion. Comparison was made with a preexposure procedure in which the compound and the common element were presented on separate trials, either in alternation or in separate blocks of trials. The effectiveness of the unique cue was less after blocked preexposure than after either of the other procedures; concurrent preexposure did not produce a greater effect than did alternating preexposure. These results challenge the suggestion that concurrent preexposure engages a special comparison process that will facilitate this form of perceptual learning.     

Overconfidence in children's multi-trial judgments of learning

The underconfidence with practice effect (UWP) refers to the finding that people's judgments of learning shift from overconfidence to underconfidence on and after a first study-test trial (Koriat, Ma'ayan, & Sheffer, 2002). Finn and Metcalfe (2007, 2008) proposed that people show UWP because they use their memory of prior test performance as a cue to make subsequent judgments of learning and inadequately account for new learning (i.e. the Memory for Past Test (MPT) heuristic). In contrast to adults, 3rd and 5th graders' judgments showed persistent overconfidence on and after a first study-test trial. A second experiment tested children's ability to remember their prior test performance. Children's prior performance discriminations were accurate for items that they answered correctly on the prior trial, but were overconfident for items they had answered incorrectly indicating that their continued overconfidence was a result of faulty memory, rather than a failure to use the MPT heuristic.     

两种电磁场边界条件推导之比较

在对电力，电子、微波、通讯等专业的学习中，对电磁场的分析是一个非常重要的部分．它不仅要求对该条件的知识有个全面的了解，而且也要求熟练应用麦克斯韦方程推导相应的边界条件，而另外一种切实可行的方法则是应用斯托克原理及麦克斯韦方程进行综合分析，并且可将过程一定的简化。     

Psychometric data for teacher judgments regarding the learning behaviors of primary grade children

The psychometric properties of the Classroom Performance Profile (CPP), a teacher rating scale, were investigated using primary grade children from economically at‐risk families. Students were rated as they progressed from kindergarten through third grade. The CPP demonstrated high internal consistency yielding Cronbach alpha coefficients for the total score of at least .96. CPP ratings were correlated with scores from the Woodcock‐Johnson Psycho‐Educational Battery–Revised: Tests of Achievement and the Social Skills Rating System–Teacher Form, Elementary Level. Results suggest that the CPP ratings were positively correlated with measures of academic achievement, academic competence, and social skills, and negatively correlated with problem behaviors. © 2002 Wiley Periodicals, Inc.     

Generalization of causal efficacy judgments after evaluative learning

In three experiments, we examined the effect of response-outcome relations on human ratings of causal efficacy and demonstrated that such efficacy ratings transfer to novel situations through derived stimulus relations. Causal efficacy ratings were higher, and probability of an outcome given a response was lower, for a differential reinforcement of high rate schedule than for either a differential reinforcement of low rate schedule (Experiment 1) or a variable interval schedule (Experiment 2). In Experiment 3, we employed schedules that were equated for outcome probability and noted that ratings of causal efficacy and the rate of response were higher on a variable ratio than on a variable interval schedule. For participants in all three experiments, causal efficacy ratings transferred to the stimulus present during each schedule and generalized to novel stimuli through derived relations. The results corroborate the view that schedules are a determinant of both response rates and causal efficacy ratings. In addition, the novel demonstration of a mechanism of generalization of these ratings via derived relations has clinical implications.     

Making judgments as the basis for workplace learning: towards an epistemology of practice

Workplace learning has emerged as a significant site of adults' informal experiential learning, with implications for the provision and shape of formal education. There are, however, a prohibitive number of variables encumbering research into such learning. We can bypass the variables by focusing on phenomenal accounts of how professionals (in this instance) make judgements at work, underpinned by an organic logic derivable from Dewey. This article shows how to characterize a new epistemology of practice through both empirical and conceptual innovation, and thus advances the detail of this new informal workplace learning. This epistemology deals in five characteristics central to lifelong learning anyway, namely: the contingent (rather than exclusively formal, sustained, and systematic studies); the practical (rather than exclusively the theoretical); the process (rather than exclusively the assimilation of content); the particular (rather than the exclusively universal and a priori as the ‘context’); and the affective and the social domains (rather than exclusively the cognitive domain). Our fieldwork so far shows, through interview findings, how these are prominent in professional workplace judgments, and what prospects there are for further research on judgment as a site of ‘organic’ learning for adults.     

Further experiments on probability learning in goldfish

The performance of goldfish in 70:30 and 50:50 visual and spatial problems was studied again under conditions like those employed in recent reversal experiments which provided the first unambiguous evidence of progressive improvement in goldfish. Random matching was found in the visual problems but not in the spatial problems, spatial choices proving rather insensitive to reinforcement ratio. The relation of random matching to the various other outcomes of such experiments is considered.     

Effects of animation's speed of presentation on perceptual processing and learning

Animations presented at different speed are assumed to differentially interact with learners’ perception and cognition due to the constraints imposed by learners’ limited sensitivity to incoming dynamic information. To investigate the effects of high and low presentation speed of animation, two studies were conducted. In Study 1, participants were 55 students who learned about the functioning of a four-stroke engine from an animation with user-controlled presentation speed. In Study 2, eye movements of 19 students were analysed for different system-controlled presentation speeds of animation. Results indicated that high presentation speeds accentuated global events (i.e., macro-events), whereas low speeds accentuated local events (i.e., micro-events). However, eye movements were primarily affected by the content rather than the presentation speed of animation.     

The role of inhibitory associations in perceptual learning

Preexposure to two compound flavors (AX and BX) typically enhances their discriminability: An aversion conditioned to AX will generalize less to BX, especially if the preexposure regime has involved alternated presentations of AX and BX rather than presenting all AX trials before BX trials (or vice versa). One possible explanation of this finding is that alternating preexposure establishes inhibitory associations between the two unique features A and B, thus counteracting the generalization produced by excitatory associations between X and A and between X and B, which might result in either the retrieval of B on a conditioning trial to AX, or the retrieval of A on a test trial to BX. Three experiments on flavor aversion conditioning in rats tested these predictions. Experiment 1 suggested that the more important of these excitatory associations was that which allowed X to retrieve A on the test trial to BX. Experiment 2 suggested that the more important inhibitory association was that which allowed B to inhibit the representation of A on this test trial. Experiment 3 provided direct evidence of the role of this inhibitory B⊣A association.     

Roles of attention in perceptual learning from perspectives of psychophysics and animal learning

The role of attention in perceptual learning has been a topic of controversy. Sensory psychophysicists/physiologists and animal learning psychologists have conducted numerous studies to examine this role; but because these two types of researchers use two very different lines of approach, their findings have never been effectively integrated. In the present article, we review studies from both lines and use exposure-based learning experiments to discuss the role of attention in perceptual learning. In addition, we propose a model in which exposure-based learning occurs only when a task-irrelevant feature is weak. We hope that this article will provide new insight into the role of attention in perceptual learning to the benefit of both sensory psychophysicists/physiologists and animal learning psychologists.     

Utility of kindergarten teacher judgments in identifying early learning problems

Most existing research on early identification of learning difficulties has examined the validity of methods for predicting future academic problems. The present study focused instead on the sensitivity of kindergarten teachers to learning problems in their students and on the continuity of teacher-identified problems over time. To identify early learning problems, kindergarten teachers in a suburban school district rated student progress toward six academic objectives as satisfactory or unsatisfactory. Twenty percent of the district's 303 kindergarten children received unsatisfactory ratings in at least one area. Thirty-eight of these children (identified group) were matched to 34 children with satisfactory ratings in all areas (nonidentified group). Results of testing conducted during kindergarten revealed poorer academic achievement in identified children than in nonidentified children. Children from the identified group also performed more poorly than children from the nonidentified group on tests of phonological processing and working memory/executive function and were rated by teachers as having more behavior and attention problems and lower social competence. Follow-up of the sample to first grade documented continued learning problems in the identified group. These findings support the use of teacher judgements in early detection of learning problems and argue against reliance on discrepancy criteria.     

Effect of different training methods on perceptual learning in impulsive children.

The effectiveness of different training and transfer test conditions in promoting perceptual learning in impulsive kindergarten children was investigated. Interproblem variability was found to be more effective than intraproblem variability, and a differentiation training procedure was found to be more effective than a matching training procedure. The results provide guidelines for designing effective training methods for improving discrimination learning and problem solving in impulsive children.