Few take up offer of gene screening     

Miller SK 《New scientist (1971)》1993,139(1891):6

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Two components of responding in Pavlovian lick suppression     

Jozefowiez J  Witnauer JE  Miller RR 《Learning & behavior》2011,39(2):138-145

The present research examined the temporal distribution of responding in a lick suppression paradigm. In Experiment 1, rats were trained with either a 30- or a 120-s conditioned stimulus (CS), which was followed either by a footshock (unconditioned stimulus [US]) or nothing. Licking during the CS was suppressed only in the former condition. Suppression was more pronounced early in the CS. In Experiment 2, rats were exposed to two 30-s or two 120-s CSs, with delivery of the shock being contingent on CS1 for half of the animals and on CS2 for the other half. For both the paired and the unpaired conditions, suppression at the beginning of CS1 was observed for all the groups. By discounting the possibility of generalization between CS1 and CS2, it appears that this initial suppression was not a conditioned response to the CS, but an unconditioned one due to mere exposure to the shock US.  相似文献   

Some determinants of second-order conditioning     

Witnauer JE  Miller RR 《Learning & behavior》2011,39(1):12-26

In a Pavlovian conditioning situation, an initially neutral stimulus may be made excitatory by nonreinforced presentations in compound with an established conditioned excitor [i.e., second-order conditioning (SOC)]. The established excitor may be either a punctate cue or the training context. In four conditioned suppression experiments using rats, we investigated whether SOC phenomena parallel other cue interaction effects. In Experiment 1, we found that the response potential of a target stimulus was directly related to the intertrial interval when SOC was mediated by a punctate cue, and inversely related to the intertrial interval when SOC was mediated by the training context. Experiment 2 demonstrated that punctate- and context-mediated SOC are oppositely affected by posttraining context extinction, and Experiments 3 and 4 demonstrated that context- and punctate-mediated SOC are differentially affected by conditioned stimulus (Experiment 3) and unconditioned stimulus (Experiment 4) preexposure treatments. These findings parallel phenomena in conditioned inhibition and cue competition situations.  相似文献   

Recovery from the overexpectation effect: Contrasting performance-focused and acquisition-focused models of retrospective revaluation     

Aaron P. Blaisdell  James C. Denniston  Ralph R. Miller 《Learning & behavior》2001,29(4):367-380

In four Pavlovian conditioned lick-suppression experiments, rats had two conditioned stimuli (CSs X and A) independently paired with footshock, followed by pairings of a compound of A and X with the footshock. On subsequent tests with CS X, less conditioned suppression was observed than in control subjects that lacked the compound AX→footshock trials. Thisoverexpectation effect was reversed through posttraining extinction of CS A, a result consistent with both performance- and acquisition-focused models of retrospective revaluation. However, only performance-focused models could account for how posttraining increases or decreases in the A-footshock temporal interval attenuate the overexpectation effect.  相似文献   

Indigenous cultural contexts for STEM experiences: snow snakes’ impact on students and the community     

Brant G. Miller  Gillian Roehrig 《Cultural Studies of Science Education》2018,13(1):31-58

Opportunities for American Indian youth to meaningfully engage in school-based science, technology, engineering, and mathematics (STEM) experiences have historically been inadequate. As a consequence, American Indian students perform lower on standardized assessments of science education than their peers. In this article we describe the emergence of meaning for students—as well as their community—resulting from Indigenous culturally-based STEM curriculum that used an American Indian tradition as a focal context. Specifically, the game of snow snakes (Gooneginebig in Ojibwe) afforded an opportunity for STEM and culturally-based resources to work in unison. A case study research design was used with the bounded case represented by the community associated with the snow snake project. The research question guiding this study was: What forms of culturally relevant meaning do students and the community form as a result of the snow snake game? Results indicate evidence of increased student and community engagement through culturally-based STEM experiences in the form of active participation and the rejuvenation of a traditional game. Implications are discussed for using culturally-based contexts for STEM learning.  相似文献   

Students’ Differential Text Production in the Regulative Context of the Classroom     

Ana M. Morais  Helena Antunes 《British Journal of Sociology of Education》1994,15(2):243-263

The research reported in this article is focused on the regulative context of the classroom and attempts to analyse the differential text production by students with different backgrounds (social class, race) and submitted to three different pedagogic practices. These practices, differing in power and control relations, required from the students specific socio‐ affective dispositions. The study explores the extent to which children possessed the specific coding orientation at the level of a given regulative pedagogic practice and also the underlying reasons. Bernstein's conceptual instruments of pedagogic code and also of recognition and realization rules were used to develop the analysis.  相似文献   

Educational epistemologies and methods in a more-than-human world     

Helena Pedersen  Barbara Pini 《Educational Philosophy and Theory》2017,49(11):1051-1054

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How students perceive teachers’ nonverbal and verbal communication at agricultural universities in Austria,Slovenia and Albania     

Marija Klopčič  Renata Bažok  Helena Virić Gašparić  Karmen Erjavec 《The Journal of Agricultural Education and Extension》2018,24(5):473-483

Purpose: This study attempts to close the research gap created by the fact that existing studies neglect the problem of how effectively agricultural professors from different European countries communicate. The aim is to identify similarities and differences in the numbers of agricultural professors perceived by students as engaging in verbal and nonverbal immediacy communication.

Methodology: An online survey was conducted among students of agricultural universities from Austria, Slovenia and Albania.

Findings: The results show that professors of agriculture from Austria, Slovenia and Albania should generally not be satisfied with their own communication patterns and should thus try to improve their communication. The result also reveals cultural differences in the shares of agriculture professors employing different communication patterns in Austria, Slovenia and Albania. Compared to Austrian and Slovenian students, their Albanian peers perceive that most of their professors use nonverbal immediacy communication. According to Austrian students, the majority of their professors use verbal immediacy. On the contrary, Albanian students assessed that some of their professors employ verbal immediacy.

Practical Implications: The results show the professors of agriculture should improve the way they communicate to students. In particular, the Albanian professors should improve their verbal communication especially in terms of providing timely and quality feedback to students.

Theoretical implications: The study reveals differences in immediacy communication among countries (Austria, Slovenia and Albania) which the scientific literature considers to have a high-context culture.

Originality/Value: Given that no study has yet examined how students perceive professors’ communication in different European countries, this research helps understand the characteristics of agricultural professors’ communication.  相似文献   

Accreditation and Quality Assurance in Europe     

Helena Sebkova 《Higher Education in Europe》2002,27(3):239-247

This article provides comprehensive information about new developments in the field of quality evaluation in Europe. It focuses on the most important international documents adopted and signed by the European authorities responsible for higher education--the Sorbonne and the Bologna Declarations and the Prague Communique´. It briefly analyzes the follow-up activities of the Bologna process initiated by the academic community of European higher education institutions, their students and their various organizations, and describes certain important consequences linked to them. Some background information about several European countries is given so as to highlight real situations.  相似文献   

Anti-bullying procedures for schools in Ireland: principals’ responses and perceptions     

Mairéad Foody  Helena Murphy  Paul Downes  James O’Higgins Norman 《Pastoral Care in Education》2018,36(2):126-140

The role of the principal is imperative in creating a school climate that nurtures differences and equality at the same time. Policy and legislation in Ireland dictates the responsibility of school principals in preventing and intervening in issues relating to bullying. The current research investigates the extent to which principals consider the impact of bullying on their students and the strategies they take to combat it in their schools. We consider how principals respond to bullying and what supports they feel are missing for them to adhere to relevant policy. A sample of 918 principals from a range of schools across Ireland completed an online survey. The results demonstrated some positive actions by principals such as the provision of anti-bullying policies. However, they also document areas that need more action such as increased access to counsellors and appointing a specific staff member to deal with and tackle bullying in each school. Guidance from the Department of Education and Skills in Ireland on the development and provision of an anti-bullying programme is called for. Results are discussed in light of the current Anti-Bullying Procedures established by the Department of Education and Skills and the Action Plan for Bullying 2013.  相似文献