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1.
Kelling AS Snyder RJ Marr MJ Bloomsmith MA Gardner W Maple TL 《Learning & behavior》2006,34(2):154-161
Hue discrimination abilities of giant pandas were tested, controlling for brightness. Subjects were 2 adult giant pandas (1
male and 1 female). A simultaneous discrimination procedure without correction was used. In five tasks, white, black, and
five saturations each of green, blue, and red served as positive stimuli that were paired with one or two comparison stimuli
consisting of 16 saturations of gray. To demonstrate discrimination, the subjects were required to choose the positive stimulus
in 16 of 20 trials (80% correct) for three consecutive sessions. Both subjects reached criterion for green and red. The female
subject also reached criterion for blue. The male was not tested for blue. This study is a systematic replication of Bacon
and Burghardt’s (1976) color discrimination experiment on black bears. The results suggest that color vision in the giant
panda is comparable to that of black bears and other carnivores that are not strictly nocturnal. 相似文献
2.
Learning to discriminate stimuli can alter how one distinguishes related stimuli. For instance, training an individual to
differentiate between two stimuli along a single dimension can alter how that individual generalizes learned responses. In
this study, we examined the persistence of shifts in generalization gradients after training with sounds. University students
were trained to differentiate two sounds that varied along a complex acoustic dimension. The students were subsequently tested
on their ability to recognize a sound that they had experienced during training when it was presented among several novel
sounds varying along this same dimension. Peak shift was observed in Experiment 1, in which generalization tests immediately
followed training, and in Experiment 2, in which the tests were delayed by 24 h. These findings further support the universality
of generalization processes across species, modalities, and levels of stimulus complexity. They also raise new questions about
the mechanisms underlying learning-related shifts in generalization gradients. The sound stimuli from this study are available
as .wav files from http://lb.psychonomic-journals.org/content/supplemental. 相似文献
3.
This study investigated how to teach perceptual tasks, that is, classifying fish locomotion, through eye movement modeling examples (EMME). EMME consisted of a replay of eye movements of a didactically behaving domain expert (model), which had been recorded while he executed the task, superimposed onto the video stimulus. Seventy-five students were randomly assigned to one of three conditions: In two experimental conditions (EMME) the model's eye movements were superimposed onto the video either as a dot or as a spotlight, whereas the control group studied only the videos without the model's eye movements. In all conditions, students listened to the expert's verbal explanations. Results showed that both types of EMME guided students' attention during example study. Subsequent to learning, students performed a classification task for novel test stimuli without any support. EMME improved visual search and enhanced interpretation of relevant information for those novel stimuli compared to the control group; these effects were further moderated by the specific display. Thus, EMME during training can foster learning and improve performance on novel perceptual stimuli. 相似文献
4.
We investigated whether pigeons are able to discriminate color photographs of male and female pigeons, using a categorical
discrimination procedure. In Experiments 1 and 2B, 10 out of 14 pigeons learned the discrimination. Of these, 5 pigeons showed
transfer to novel stimuli, demonstrating the categorical nature of the trained discrimination. Experiment 3 showed that the
discriminative behavior was based primarily on the body, as opposed to the head and the neck region. In 1 out of 3 pigeons,
the discriminative behavior was maintained by the black-and-white photographs. The results suggest that some pigeons have
the ability to discriminate the sex of conspecifics without behavioral cues. 相似文献
5.
Ruth Stavy 《科学教学研究杂志》1990,27(3):247-266
This research examines children's (ages 9–15) conception of changes in the state of matter from liquid or solid to gas, as well as their understanding of the reversibility of this process. Children were tested for their ability to conserve matter, its identity, and its weight in tasks using evaporation of acetone and sublimation of iodine. It was found that children who recognized weight conservation in one of the tasks did not necessarily recognize the same in the second task. Students believed that gas has no weight, or that gas is lighter than the same material in its liquid or solid state. In addition, students who recognized weight conservation were not always aware of the reversibility of the process. Until the age of 12 specific perceptual input from the task (e.g., color) dramatically influenced students' responses to the conservation of weight task. The relationship between children's intuitive ideas about matter, as observed in this study, and their logical ability to conserve weight, as observed in this study, is discussed. 相似文献
6.
Socially reared juvenile bonnet macaques responded at high sustained levels in an operant task for presentation of color videotaped television images of social stimuli. Absolute levels of response depended upon the nature of the stimulus. In two experiments, subjects responded at 60.8% and 74.6% of the 1-h experimental sessions for presentation of a color videotape of a conspecific adult female moving freely in an enclosed stimulus chamber. In a later experiment, subjects maintained high levels of response during 15-min sessions for presentations of the conspecific image, but responded with significantly shorter duration responses for similar presentation of a videotape of an adult female of another macaque species, a still picture of a conspecific adult female, and a videotape of the empty stimulus chamber. With longer, 1-h, stimulus presentation, the three social stimuli sustained high levels of response while responses for presentation of the empty stimulus chamber waned significantly over the experimental session. The sustained high levels of response obtained over several hours of stimulus presentation suggest the value of color videotape stimuli in the experimental study of social perception in nonhuman primates. 相似文献
7.
One captive adult chimpanzee and 3 adult American black bears were presented with a series of natural category discrimination tasks on a touch-screen computer. This is the first explicit comparison of bear and primate abilities using identical tasks, and the first test of a social concept in a carnivore. The discriminations involved a social relationship category (mother/offspring) and a nonsocial category involving food items. The social category discrimination could be made using knowledge of the overarching mother/offspring concept, whereas the nonsocial category discriminations could be made only by using perceptual rules, such as “choose images that show larger and smaller items of the same type.” The bears failed to show above-chance transfer on either the social or nonsocial discriminations, indicating that they did not use either the perceptual rule or knowledge of the overarching concept of mother/offspring to guide their choices in these tasks. However, at least 1 bear remembered previously reinforced stimuli when these stimuli were recombined, later. The chimpanzee showed transfer on a control task and did not consistently apply a perceptual rule to solve the nonsocial task, so it is possible that he eventually acquired the social concept. Further comparisons between species on identical tasks assessing social knowledge will help illuminate the selective pressures responsible for a range of social cognitive skills. 相似文献
8.
Anne Collins McLaughlin Wendy A. Rogers Edmundo A. Sierra Jr Arthur D. Fisk 《Learning, Media and Technology》2007,32(4):381-405
Task instruction may be presented in many forms. However, training system designers are often forced to depend on intuition when choosing a presentation medium. Though past research has investigated the effectiveness of instructional media types, results have been mixed with no clear recommendations of which medium to use for instruction. An organizational framework for matching the appropriate medium or media to a learning situation is necessary for progress to occur in this research area. Through three experiments, we investigated the attributes of audio and video as instructional media, identified tasks for which we might predict the most beneficial instructional media, and tested our proposed organizational framework by manipulating the difficulty of the task and the complexity of the instructions. Older and younger adults participated in the experiments to help us understand differences in training needs for varying cognitive and perceptual abilities. We provide the basis for a taxonomy of instructional media and task demands, to be added through further research. 相似文献
9.
The experiment examined the relationship among several variables affecting extra-dimensional (ED) shift performance. Children and adults were trained to one of three criteria and given one of two ED shifts. All tasks required S to choose one of two colored geometric forms projected on a screen. The results are: (a) older Ss made fewer errors in training and transfer than younger Ss; (b) overtraining did not facilitate the ED shift wherein stimuli remained the same from training to transfer for the adults, but it did for the 7- and 8-year-old children; (c) overtraining inhibited the performance of the 5- and 6-year-old Ss given this ED shift; (d) overtraining neither facilitated nor inhibited the ED shift wherein stimuli changed from training to transfer. An interpretation was given in terms of verbal labeling, discrimination of change, perservative errors, and task difficulty. 相似文献
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12.
In three experiments, we examined pigeons’ recognition of video images of human faces. In Experiment 1, pigeons were trained
to discriminate between frontal views of human faces in a go/no-go discrimination procedure. They then showed substantial
generalization to novel views, even though human faces change radically as viewpoint changes. In Experiment 2, the pigeons
tested in Experiment 1 failed to transfer to the faces dynamically rotating in depth. In Experiment 3, the pigeons trained
to discriminate the dynamic stimuli showed excellent transfer to the corresponding static views, but responses to the positive
faces decreased at novel viewpoints outside the range spanned by the dynamic stimuli. These results suggest that pigeons are
insensitive to the three-dimensional properties of video images. Consideration is given to the nature of the task, relating
to the identification of three-dimensional objects and to perceptual classifications based on similarity judgments. 相似文献
13.
Disorientation and confusion have been identified as significant problems for older persons newly admitted to nursing homes and other institutions. The purpose of this study was to determine which of two orientating systems might be best for helping older people become accustomed to a strange environment. Middle‐aged and elderly residents of a nursing home were dichotomized by performance on three memory tests and then were given two paired‐associate learning tasks. In one task colors and a place in the nursing home were to be associated; in the other symbols and a place in the nursing home were to be associated. The results indicated that the symbol‐place paired‐associate task was learned more rapidly than the color‐place task by both high and low memory ability groups, and that the lower memory ability group showed slower learning of the color‐place task compared to the higher memory ability group. In addition, learning was slower on both tasks when the color‐place task was the first presented. These results indicated that symbol‐place codes may be more useful than color‐place codes as orientation markers and suggested that evaluation of learning performance should include examination of order effects. 相似文献
14.
In two experiments, we examined how preexposure to discriminative stimuli and introduction of a 21-day retention interval
affected the latent inhibition (LI) and perceptual learning (PL) of rats in a choice-maze discrimination task. Experimental
groups were preexposed to three wall patterns, one in each of three arms of a maze. Control groups were preexposed only to
white arms. PL groups were trained to discriminate A versus B, and LI groups, to discriminate A or B versus C. The A and B
patterns shared many elements not shared with the C pattern. In Experiment 1, both at the end of training and after the subsequent
retention interval, the PL groups performed better than controls, whereas the LI groups performed worse. In Experiment 2,
inserting the 21-day retention interval between preexposure and discrimination training disrupted final measures of LI but
not PL performance. Implications for current concepts of PL and LI are discussed. 相似文献
15.
David Moore 《British Journal of Special Education》2001,28(3):138-141
Sensory training, based on the latest research findings in neuroscience and perceptual psychology, is beginning to make a significant impact on practice in the treatment of language impairments. This training has three novel aims: the stimuli are designed to engage and develop specific brain processing modules; the training task difficulty is dynamically modulated, leading to the most efficient learning for an individual; and the tasks are presented as highly motivating computer games to encourage the long periods of training that result in optimal learning. The published results are impressive, with improvements averaging two years in language age following four weeks of intensive training. In this article, David Moore, Professor of Auditory Neuroscience at the University Laboratory of Physiology in Oxford and Chief Technology Officer for Mind Weavers Ltd at the Oxford Centre for Innovation, explores the research leading to these initiatives. While the mechanisms of the training remain controversial, it seems likely that, in the future, automated training of this type will make a major impact on practice in special education and in many other fields. 相似文献
16.
The translational-symmetry hypothesis of abstract-concept learning was tested in a same/different (S/D) task with pairs of pictures. The translational-symmetry hypothesis proposes that subjects discriminate same trials by the simultaneous repetition of features in the two pictures (and different trials by the lack of feature repetition). Pigeons that had learned a simultaneous S/D task were tested with delays between
the two pictures to remove emergent perceptual cues. In Experiment 1, we tested delays of 0 and 1 sec. The results did not
show the accuracy decrease expected according to the translational-symmetry hypothesis. In Experiment 2, we expanded the delays
to 2 and 6 sec. Even at the longest delay, there was no evidence of the precipitous performance decline or default strategy
that would be predicted by translational symmetry. The results provide evidence against translational symmetry (or other perceptually
emergent features) that might control these pigeons’ performance in our two-item S/D task. 相似文献
17.
Martin Zettersten Catherine Bredemann Megan Kaul Kaitlynn Ellis Haley A. Vlach Heather Kirkorian Gary Lupyan 《Child development》2024,95(2):497-514
The present study tested the hypothesis that verbal labels support category induction by providing compact hypotheses. Ninety-seven 4- to 6-year-old children (M = 63.2 months; 46 female, 51 male; 77% White, 8% more than one race, 4% Asian, and 3% Black; tested 2018) and 90 adults (M = 20.1 years; 70 female, 20 male) in the Midwestern United States learned novel categories with features that were easy (e.g., “red”) or difficult (e.g., “mauve”) to name. Adults (d = 1.06) and—to a lesser extent—children (d = 0.57; final training block) learned categories composed of more nameable features better. Children's knowledge of difficult-to-name color words predicted their learning for categories with difficult-to-name features. Rule-based category learning may be supported by the emerging ability to form verbal hypotheses. 相似文献
18.
Simon Knight Yvonne C. Davila Leigh J. Martin Daniel W. Krix 《Assessment & Evaluation in Higher Education》2019,44(8):1121-1132
AbstractIn calibration tasks students assess exemplar texts using criteria against which their own work will be assessed. Typically, these tasks are used in the context of training for peer assessment. Little research has been conducted on the benefits of calibration tasks, such as benchmarking, as learning opportunities in their own right. This paper examines a dataset from a long-running benchmarking task (～500 students per semester, for four semesters). We investigate the relationship of benchmarking performance to other student outcomes, including ability to self-assess accurately. We show that students who complete the benchmarking perform better, that there is a relationship between benchmarking performance and self-assessment performance, and that students appreciate the support for learning that benchmarking tasks provide. We discuss implications for teaching and learning flagging the potential of calibration tasks as an under-explored tool. 相似文献
19.
Patrizia Piotti Dóra Szabó Zsófia Bognár Anna Egerer Petrouchka Hulsbosch Rachel Sophia Carson Enikő Kubinyi 《Learning & behavior》2018,46(4):537-553
Several studies on age-related cognitive decline in dogs involve laboratory dogs and prolonged training. We developed two spatial tasks that required a single 1-h session. We tested 107 medium-large sized dogs: “young” (N=41, aged 2.5–6.5 years) and “old” (N=66, aged 8–14.5 years). Our results indicated that, in a discrimination learning task and in a reversal learning task, young dogs learned significantly faster than the old dogs, indicating that these two tasks could successfully be used to investigate differences in spatial learning between young and old dogs. We also provide two novel findings. First, in the reversal learning, the dogs trained based on the location of stimuli learned faster than the dogs trained based on stimulus characteristics. Most old dogs did not learn the task within our cut-off of 50 trials. Training based on an object’s location is therefore more appropriate for reversal learning tasks. Second, the contrast between the response to the positive and negative stimuli was narrower in old dogs, compared to young dogs, during the reversal learning task, as well as the cognitive bias test. This measure favors comparability between tasks and between studies. Following the cognitive bias test, we could not find any indication of differences in the positive and negative expectations between young and old dogs. Taken together, these findings do not support the hypothesis that old dogs have more negative expectations than young dogs and the use of the cognitive bias test in older dogs requires further investigation. 相似文献
20.
培养学习者自主学习与创新能力是近20年来外语教学界的热门话题.本文探讨了与提高自主学习与创新能力密切相关的任务训练问题.首先分析任务的内涵和分类,然后探讨任务训练的主要模式,强调任务训练的必要性.提出了通过对大学一年级学生进行任务训练,不但可以提高学生的听力水平,而且还可提高学生的自主学习与创新能力. 相似文献