Domestic pigeons (Columba livia) discriminate between photographs of male and female pigeons     

Nakamura T  Ito M  Croft DB  Westbrook RF 《Learning & behavior》2006,34(4):327-339

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   

Motivated learning with digital learning tasks: what about autonomy and structure?     

Anne-Marieke van Loon  Anje Ros  Rob Martens 《Educational technology research and development : ETR & D》2012,60(6):1015-1032

In the present study, the ways in which digital learning tasks contribute to students?? intrinsic motivation and learning outcomes were examined. In particular, this study explored the relative contributions of autonomy support and the provision of structure in digital learning tasks. Participants were 320 fifth- and sixth-grade students from eight elementary schools throughout the Netherlands. The results show that a digital learning task that combined autonomy support and structure had a positive effect on both intrinsic motivation and learning outcomes in students. A digital learning task that only provided structure also had a positive effect on learning outcomes, but a digital learning task with only autonomy support did not yield a similar effect.  相似文献   

Reconceptualising higher education pedagogy in online learning     

Nicole C. Green  Helen Edwards  Brenda Wolodko  Cherry Stewart  Margaret Brooks  Ros Littledyke 《Distance Education》2010,31(3):257-273

The purpose of this collaborative inquiry project was to examine teacher education practices in two early childhood degree programmes in a school of education at a regional university in Australia. All students are enrolled in these online courses as distance learners. The reconceptualised online pedagogy immersed students, peers and their lecturers in ‘teaching through assessment’ (Edwards, 2010) in a collaborative online environment that mirrors the complexity that students are experiencing in their workplaces. This article describes the pedagogical and conceptual underpinnings we used to reconceptualise our degree programmes. It also outlines our evolving conceptualisations of learning as knowledge creation (Hong & Sullivan, 2009) in the context of our teaching and learning in online courses.  相似文献   

Three-dimensional kinematic analysis and power output of elite flat-water kayakers     

Anna Bjerkefors  Olga Tarassova  Johanna S. Rosén  Pascal Zakaria  Anton Arndt 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):414-427

The purpose was to examine power output and three-dimensional (3D) kinematic variables in the upper limbs, lower limbs and trunk in elite flat-water kayakers during kayak ergometer paddling. An additional purpose was to analyse possible changes in kinematics with increased intensity and differences between body sides. Six male and four female international level flat-water kayakers participated. Kinematic and kinetic data were collected during three tasks; low (Int_L), high (Int_H) and maximal (Int_M) intensities. No differences were observed in any joint angles between body sides, except for shoulder abduction. Significantly greater range of motion (RoM) values were observed for Int_H compared to Int_L and for Int_M compared to Int_L in trunk and pelvis rotation, and in hip, knee and ankle flexion. The mean maximal power output was 610 ± 65 and 359 ± 33 W for the male and female athletes, respectively. The stroke frequencies were significantly different between all intensities (Int_L 59.3 ± 6.3; Int_H 108.0 ± 6.8; Int_M 141.7 ± 18.4 strokes/min). The results showed that after a certain intensity level, the power output must be increased by other factors than increasing the joint angular RoM. This information may assist coaches and athletes to understand the relationship between the movement of the kayaker and the paddling power output.  相似文献   

Building Bridges in Early Literacy     

Ros Fisher 《International Journal of Early Years Education》1997,5(3):189-197

This paper reports on a case study of two teachers teaching reading in the child's first year of school. The researcher analysed the largely spontaneous, literacy related responses made by teachers to children and the comments these teachers made about their thoughts and actions in interviews after the teaching sessions. Very little direct teaching was observed and teachers seemed to be reacting more often than working in a proactive way. This has been termed ‘crisis management’ by some, but it is argued here that this ‘reaction’ was, in reality, purposeful interaction.

These teachers worked at building bridges between children's experience and their literacy learning. Analysis of the interactions suggested ways in which teachers may adopt procedures that go some way towards compensating for the differences between home and school learning. The writer argues that demands for an organisational structure that reduces individualisation could be counter‐productive for the youngest children in school.  相似文献   

Discussion of the Controversy Concerning a Historical Event Among Pre-service Teachers     

Rosária Justi  Paula Cristina Cardoso Mendonça 《Science & Education》2016,25(7-8):795-822

As part of a teacher training project, 16 future chemistry teachers participated in a dramatisation activity (a mock trial of the Fritz Haber case), in which they discussed a controversy concerning an event from the history of science: the awarding of the Nobel Prize in Chemistry to Fritz Haber in 1918. Preparations for the role-play activity, the dramatisation of the mock trial, and the subsequent discussions were video-recorded. We also collected the written material produced by the pre-service teachers and the reflective journals they produced during their involvement with the activity. This article discusses the contributions of such an experience to future teachers’ knowledge on aspects related to both nature of science and argumentation, as well as to their views on their future actions related to authentic teaching of and about science. The results show that such contributions were meaningful.  相似文献   

Domestic pigeons (Columba livia) discriminate between photographs of individual pigeons     

Nakamura T  Croft DB  Westbrook RF 《Learning & behavior》2003,31(4):307-317

In two experiments, we examined the discrimination of photographs of individual pigeons by pigeons, using go/no-go discrimination procedures. In Experiments 1A and 1B, the pigeons were trained to discriminate 4 photographs of one pigeon from those of a number of pigeons. The subjects learned the discrimination, but their discriminative behavior did not transfer to new photographs taken from novel perspectives. When the pigeons were trained to discriminate between 20 photographs of five pigeons taken from four perspectives as the S+ and 20 photographs of five different pigeons as the S-, the subjects learned the discrimination, and this discriminative behavior partially transferred to new photographs taken from novel perspectives (Experiments 2A-2C). The results suggest that pigeons are able to discriminate among conspecific individuals, using stationary visual cues. This strengthens the assumption in evolutionary theory that animals can discriminate among individuals and encourages further investigation as to how this ability is used in various behaviors of animals.  相似文献   

Assessment of performance in practical science and pupil attributes   总被引：2，自引：0，他引：2  

Ros Roberts  Richard Gott 《Assessment in Education: Principles, Policy & Practice》2006,13(1):45-67

Performance assessment in the UK science General Certificate of Secondary Education (GCSE) currently relies on pupil reports of their investigations. These are widely criticized. Written tests of procedural understanding could be used as an alternative, but what exactly do they measure? This paper describes small‐scale research in which there was an analysis of assessments of pupils' GCSE scores of substantive ideas, their coursework performance assessment and a novel written evidence test. Results from these different assessments were compared with each other and with baseline data on CAT scores and pupils' attributes. Significant predictors of performance on each of these assessments were determined. The data reported shows that a choice could be made between practical coursework that links to ‘behaviour’ and written evidence tests which link, albeit less strongly, with ‘quickness’. There would be differential effects on pupils.  相似文献   

A Case Study of the Development of a Beginning Chemistry Teacher's Knowledge about Models and Modelling     

Rosária Justi  Jan van Driel 《Research in Science Education》2005,35(2-3):197-219

In this paper, we present a case study of a beginning chemistry teacher who enrolled in a project aimed to contribute to the development of teachers' knowledge of models and modelling in science. The project consisted of a series of institutional meetings in combination with an action research project the teacher conducted in her own classes. By explaining how the project was conducted and mainly by focusing on the teacher's voice, her dynamic, continuous, and non-linear process of knowledge development is discussed in detail. We were able to investigate and describe this development in terms of various types of knowledge – content knowledge, curricular knowledge and pedagogical content knowledge – which were developed simultaneously. Among other results, it became clear how certain institutional activities led to specific choices in the teacher's action research project. For instance, although initially she was reluctant to conduct a modelling activity in her class, she decided to experiment with such an activity in her action research project. Subsequently, the responses of her students during the project convinced her of the value of this modelling activity and helped her to become aware of specific views of her students. Finally, it became evident that the whole experience made her very enthusiastic and stimulated her to formulate specific intentions with respect to the future, both in terms of applying certain teaching activities and in terms of collaborating with colleagues.  相似文献   

What the rat’s nose tells the rat’s mouth: Long delay aversion conditioning with aqueous odors and potentiation of taste by odors     

Burton M. Slotnick  Fred Westbrook  Frances M. C. Darling 《Learning & behavior》1997,25(3):357-369

In Experiment 1, olfactory bulbectomized and control rats were trained using operant conditioning to determine the taste threshold of aqueous amyl acetate. Concentrations below gustatory threshold were used in Experiments 2–5 to compare the effectiveness of odors with various concentrations of saccharin as cues for illness. The results showed the following: (1) The effectiveness of odor and taste was directly related to concentration; (2) the strength of an aversion to a concentration of taste could be matched by an appropriate concentration of an odor; (3) odor was as effective as taste with CS-US delays of 4 h; and (4) an effective odor potentiated an aversion to an otherwise ineffective taste. The results challenge the privileged role accorded tastes in food aversion learning and the manner in which tastes are held to interact with odors according to the sensory-and-gate channeling analysis of potentiation (Rusiniak, Hankins, Garcia, & Brett, 1979).  相似文献