Artificial grammar learning in pigeons

In two experiments, we developed a new methodology for studying complex stimulus control by spatial sequences of letters generated by artificial grammars. An artificial grammar is a system of rules that defines which letter sequences or strings are “grammatical.” In Experiment 1, pigeons learned to respond differently to strings conforming to a grammar versus strings that were nongrammatical distortions. Several different criteria all suggested that performance was controlled both by some short chunks of strings shared between reinforced training strings and novel transfer strings and by more complex sequential regularities. In Experiment 2, pigeons quickly and accurately learned to respond differently to strings conforming to one or the other of two different artificial grammars. As in Experiment 1, performance was controlled both by some short chunks and by more complex sequential regularities. The results are interpreted in terms of family resemblance and pose new goals for theories of complex stimulus control.     

The nature of discrimination learning in pigeons

The results from five experiments are considered in relation to two of Spence's (1937, 1938) proposals concerning discrimination learning. In Experiments 1 and 2, we investigated whether his ideas about the interaction between excitatory and inhibitory generalization gradients can be used to understand how animals solve a complex patterning discrimination. The results supported a development of his proposals as put forward by Pearce (1994), provided a modification was made to Pearce's rulefor determining the shape ofthe generalization gradient. In Experiments 3, 4, and 5, we examined whether animals would pay more attention to stimuli that are relevant, rather than irrelevant, to the solution of a discrimination. The results supported this proposal for stimuli comprising visual patterns, but not for those comprising plain colors. The results also indicated that change of attention was a consequence of preliminary receptor-exposure acts, as envisaged by Spence, and not of more central changes in attention.     

大学生英语自主学习过程中的元动机调查研究

随着国际交流的加强,英语的重要性日益显现,英语自主学习研究自然而然地成了外语教育界的研究热点。然而奇怪的是,研究者在热衷于研究学习者利用元认知对自身认知进行管理和调控的同时,却忽略了其利用元动机对自身动机进行的管理与调控;在致力于研究学习者动机的同时,却忽略了其对自身动机的意识(元动机)。针对这一情况,文章运用定量分析的方法,对172名非英语专业本科生在英语自主学习过程中的元动机情况进行了调查,结果发现他们的元动机强度整体偏低,元动机的具体策略使用不均衡,并且存在个体差异,而其元动机强度与学业成绩成正相关关系。     

Testing the translational-symmetry hypothesis of abstract-concept learning in pigeons

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.     

Time-of-day discriminative learning in homing pigeons,Columba livia

Pigeons were trained on an operant procedure to discriminate between morning and afternoon when location did not vary (Experiment 1). The pigeons were placed on a fixed interval (FI) schedule in the morning and on a different FI schedule in the afternoon. Probe trials that occurred at the beginning of the training sessions were examined. The pigeons responded differently, depending on the time of day, reflecting the learning of a stable 24-h memory representation of the association between the FI schedules and the time of day. The pigeons from Experiment 1 were then clock shifted and tested twice, to determine whether they were relying on an endogenous circadian oscillator, an hourglass mechanism influenced by the photoperiod, or environmental noise to make the time-of-day discrimination (Experiment 2). The results of the second experiment indicated a circadian mechanism was most important for the observed time-of-day learning.     

Conditioned inhibition in feature negative discrimination learning with pigeons

Discrimination performance was investigated with pigeons using feature negative (FN) discrimination procedures which differed in the temporal arrangement of the stimuli on S? trials. In both procedures, a single common element was presented on reinforced (S+) trials. In thesimultaneous FN procedure, a distinguishing element was presented simultaneously with the common element of S? trials. In thesequential FN procedure, the distinguishing element preceded onset of the common element on S? trials. In two experiments, the sequential FN procedure yielded better discrimination performance. In Experiment 1, a summation test designed to separate learning and performance variables indicated that sequential FN subjects had learned the negative relationship between the distinguishing element and reinforcement while simultaneous FN subjects had not. In Experiment 2, summation and acquisition tests indicated that the distinguishing element developed inhibitory properties in the sequential FN procedure but not in the simultaneous FN procedure.     

高中学生英语学习策略的调查与分析

在简要论述国内外第二语言学习策略研究的基础上,利用Oxford编制的语言学习策略量表(SILL),对浙江淳安县综合高中学生的英语学习策略进行调查,分析了他们英语学习策略的使用情况,并就英语学习成绩、性别二因素与学习策略使用的关系进行了研究.SPSS11.0相关分析和独立样本t检验表明:学生最常用的是补偿策略和元认知策略,最少用的是情感策略;6大类24项学习策略与学习成绩有显著的相关关系;女生使用认知策略、记忆策略的频率要高于男生;高成就和低成就学生英语学习策略的使用上具有显著差异.     

An investigation of student teachers' knowledge about their own learning

Twenty-nine student teachers from a large metropolitan university in Queensland, Australia were interviewed at the beginning (Time 1) and end (Time 2) of a year-long graduate diploma in education to investigate the nature of their knowledge about learning and changes in such knowledge over the year. At Time 1 and Time 2 most students thought learning should be meaningful and preferred to use transformative learning approaches. However, students indicated a willingness to engage in reproductive approaches to learning if the content to be learned was uninteresting, workloads were high, or assessment was examination-focussed. The results also indicated that while many students did not experience significant changes in their knowledge about learning over the year, they believed that transformative learning had become more of a focus for them. Investigating student teachers' knowledge about learning has implications for effective learning in teacher education programs.     

An investigation of user perceptions and attitudes towards learning objects

This study empirically evaluates the technology acceptance model drawn from Information Systems (IS) literature to investigate how user beliefs and attitudes influence learning-object use among higher education learners by evaluating the relationships between perceived usefulness, perceived ease of use, attitude, behavioural intentions and actual use. In the study, 601 potential learning-object users were presented with an introductory demonstration of learning objects for a Digital Systems course. Following the demonstration and practice, data on user beliefs, attitudes and intention to use learning objects were gathered, while data on actual use of learning objects was collected at the end of the semester. Subjects with prior experience using the learning objects were eliminated from further analysis, resulting in a final sample of 481 users. structural equation modelling was employed to test the hypothesised study model. The analysis showed that both the user beliefs and attitudes have significant positive relationships with behavioural intention and that behavioural intention accurately predicted the actual use of learning objects. The results extend the validity of the TAM into a learning object context and clearly pointed out that it can be used to predict users' future behaviour.     

An investigation of verbal behamor and learning climate in undergraduate engineerimg clmsrooms

The verbal behavioral patterns of twenty university professors instructing undergraduate engineering classes have been investigated utilizing a fourteen category modification of Flanders' system of interaction analysis. On the basis of an internal evaluation criteria, these instructors were divided into three groups: those receiving the highest, middle, and lowest evaluations. The verbal instructional patterns and classroom climates of these three groups are compared. Several significant findings are reported.     

An investigation of blended learning to support reading instruction in elementary schools

Educational technology research and development - Research is needed to address the possible benefits of blended learning as a form of reading instruction in elementary schools. Blended learning...     

An investigation of the approach to learning of Nepalese tertiary students

This investigation with 342 Nepalese tertiary students indicates that current conceptions of approaches to learning are relevant to these students. Factor analysis of the Study Process Questionnaire (SPQ) also suggests that the structure of learning processes is similar for Nepalese, Australian, and Filipino students. Internal locus of control also seems to be a factor in the adoption of deep and achieving approaches to learning in each of these cultures. Evidence of differences in secondary and tertiary student approaches to learning within Nepal and comparisons between Nepalese and Australian tertiary students' approaches to learning are also presented.     

An investigation of the influence of emotional factors on learning in physics instruction

In a study of learning processes in 24 eighth grade physics classrooms in Germany, data were collected in respect to cognitive variables (prior knowledge, learning outcomes, use of learning strategies), cognitive-emotional variables (self-concept, interest), as well as emotional variables (anxiety, boredom, sense of well-being). Both quantitative and qualitative methods were used. Interest and emotional factors are further differentiated into situation-related and habitual (most likely biographically determined) components. In constructing the teaching unit (basic electricity) a learning oriented knowledge acquisition phase was followed by a more achievement oriented practice phase. Analysis shows that positive emotions are more important in the acquisition phase than in the practice phase. Anxieties play an ambiguous role in the practice phase. Additionally, the results provide indications that joy about learning in particular, and also interest are frequently linked to successful learning processes, and not merely to the nature of the subject matter.     

开放教育计算机专业毕业设计调查研究

以陕西电大连续三年的计算机科学与技术专业毕业设计为基本资料,采取静态资料法、比较法和综合分析法,系统分析了设计的选题、工具、指导和成效,客观地指出了存在的问题,并从较广的视野上分析了影响毕业设计质量的主要因素和改进思路。     

网络环境下大学生英语学习策略与学习效能的相关性研究

本研究采用问卷调查的方法,分别对网络环境下的英语学习策略和传统学习环境下的一般学习策略的使用情况进行了调查与分析,比较两种不同学习环境中大学生英语学习策略使用的异同,并探究了网络学习环境下英语学习策略与学习效能之间的相关性,旨在探讨如何培养大学生基于网络的学习策略意识,有效地构建网络环境下的英语学习策略,从而提高学习效能。     

An investigation of SOAR study strategies for learning from multiple online resources

This mixed-methods study investigated the effects of the SOAR study strategy for learning from multiple online resources. SOAR includes the components of selection, organization, association, and regulation. Past research confirmed that college students who study provided or partially provided SOAR materials achieved more than those using their preferred study methods when learning from a single printed (Jairam & Kiewra, 2009) or computer-based (Jairam & Kiewra, 2010) text. The present study was the first to investigate SOAR when college students create their own study materials and must learn from multiple online resources. In the present study, one hundred and thirty-four college students were assigned randomly to the preferred strategy control group or the SOAR strategy experimental group. Following a pre-survey and online training in their respective study strategy, both groups were directed to use their trained strategy to study scientific material available on multiple websites. Following the study period, participants were tested on the online material and then completed a post-survey. Qualitative analyses of pre-survey responses (before training) indicated that participants from both groups commonly use note taking, summarization, and memorization strategies to study online resources. Qualitative analyses of post-survey responses (after training) indicated that the preferred strategies control group used these same strategies to study the experimental material, whereas the SOAR-trained group used SOAR strategies. These qualitative data fit with quantitative data showing that (a) both groups created study materials reflective of their strategy training (preferred or SOAR); (b) SOAR strategy studiers achieved more than preferred strategy studiers on fact, relationship, and concept achievement items; and (c) SOAR-trained studiers had more positive attitudes about their trained methods than preferred-trained studiers.     

Within-event learning contributes to value transfer in simultaneous instrumental discriminations by pigeons

Following simultaneous discrimination training with pigeons, in which responding to the S−was reinforced on half of the trials and responding to the S− was never reinforced, we examined the effect on the S− of presenting the S− by itself and the effect on the S+ of presenting the S− by itself (relative to an S− or an S− for which there had been no single-stimulus presentations). For Group A−, responding to the S− presented by itself was always reinforced, whereas for Group A−, such responding was extinguished. For Group B−, responding to the S− presented by itself was always reinforced, whereas for Group B+, responding was extinguished. Although both Group A+ and Group A−tended to avoid their associated S− (relative to a control S−), Group A+ avoided its associated S− less than did Group A−. In contrast, although for Group B−, presentation of the S− alone increased the pigeons’ preference for its associated S−(relative to a control S+), for Group B−, presentation of the S−alone had little effect on its preference for its associated S+. These results suggest that presentation of one stimulus from a simultaneous discrimination has two independent and sometimes opposite effects on the other discriminative stimulus. First, it reduces the strength of within-event conditioning between the S+ and the S−, and second, if the value of the singly presented stimulus has increased, some of its newly acquired value will transfer retroactively to the stimulus with which it was originally paired.     

Intradimensional vs. extradimensional transfer in the discriminative learning of goldfish and pigeons

Evidence of better intradimensional than extradimensional transfer was sought in naive goldfish trained under free-operant single-stimulus conditions (Experiment I), sophisticated pigeons trained under free-operant single-stimulus conditions (Experiment II), sophisticated pigeons trained under discrete-trials choice conditions (Experiment III), and naive pigeons trained under discrete-trials choice conditions (Experiment IV). The results provide no support for attention theory.     

Reinstatement of postresponse stimuli prior to reward in delayed-reward discrimination learning by pigeons

Delayed-reward learning in pigeons was examined using a simultaneous red-green visual discrimination task in which the conditions during the delay interval were varied between groups. The nondifferential group received training in which the stimulus present during the 1-min delay was the same following a peck on the correct and incorrect colors. The other three groups received 1-min delay training in which different stimuli occurred in the delay interval following correct and incorrect choices. The differential group received continuous, differential stimuli during the delay. The reinstatement group received the differential stimuli in the 10 sec immediately following the choice and during the last 10 sec of the delay. The reversedcue group was treated in the same way, except that the 10-sec delay stimulus immediately following an incorrect response was also presented for 10 sec prior to reward on correct choices, and the stimulus following a correct response also occurred 10 sec before nonreward on incorrect choices. Nondifferential birds failed to learn the discrimination, while differential and reinstatement birds learned it readily. The reversed-cue birds learned to choose the incorrect stimulus. Differential and reinstatement birds showed no decrement in performance when the delay was increased to 2 min. These findings suggest that similarity of prereward and postresponse delay stimuli controls choice responding in long-delay learning, a finding compatible with both memorial and conditioned reinforcement interpretations.