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Contextual Changes (contextual + change)

Distribution by Scientific Domains

Humanities and Social Sciences	60%

Selected Abstracts

Contextual modulation of spatial discrimination reversal in developing rats

DEVELOPMENTAL PSYCHOBIOLOGY, Issue 1 2005
Jerome H. Pagani
Abstract Reversal of discrimination learning is influenced by manipulation of the training context. In adult and developing rats, contextual changes made between acquisition and reversal aid the learning of the new discrimination, possibly by serving to release proactive interference from the originally acquired discrimination (M. E. Bouton & D. C. Brooks, 1993; N. Spear, G. Smith, R. Bryan, & W. Gordon, 1980). The present study sought to examine this effect in an appetitive T-maze task, as a function of different contextual manipulations. Rats of three ages, Postnatal Day (PND) 19, PND23, and PND30, were tested for their ability to acquire and reverse a position habit in a T-maze. Contextual changes were made between acquisition and reversal sessions and consisted of one of three manipulations: (a) texture; the texture of the maze floor was changed via the addition or subtraction of wire mesh; (b) maze; subjects were reversed in a different maze that was identical in construction to the training maze, but differed in spatial location; (c) texture and maze; subjects were shifted to the new maze, the floor of which differed in texture from the training maze but was otherwise identical in construction. Results showed that the texture,maze combination was an effective aid to reversal learning at all ages tested. The texture alone, however, was not effective at any age. The maze alone also was an effective cue for reversal, but proved to have the greatest effect for PND30 subjects. During ontogeny, the contextual modulation of reversal learning is importantly influenced by the nature and the salience of the contextual cue. © 2004 Wiley Periodicals, Inc. Dev Psychobiol 46: 36,46, 2005. [source]

The Effect of Learning Experiences and Context on Infant Imitation and Generalization

INFANCY, Issue 6 2008
Emily J. H. Jones
Over the first years of life, infants gradually develop the ability to retrieve their memories across cue and contextual changes. Whereas maturational factors drive some of these developments in memory ability, experiences occurring within the learning event may also impact infants' ability to retrieve memories in new situations. In 2 experiments we examined whether it was possible to facilitate 12-month-old infants' generalization of learning in the deferred imitation paradigm by varying experiences before or during the demonstration session, or during the retention interval. In Experiment 1, altering the length, timing, or variability of training had no impact on generalization; infants showed a low, but consistent level of memory retrieval. In Experiment 2, infants who experienced a unique context for encoding and retrieval exhibited generalization; infants who experienced the context prior to the demonstration session, or during the retention interval, did not. Specificity is a robust feature of infant memory and is not substantially altered by encoding experiences in an observational learning paradigm. Previous history with a learning environment can, however, impact the flexibility of memory retrieval. [source]

Design Inertia: Designing for Life-Cycle Flexibility in Internet-Based Services,

THE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 3 2005
Roberto Verganti
Managing innovation in rapidly moving environments, such as Internet-based services, is a major challenge in theory and in practice. Most of the existing literature focuses on the development process as the main area in which innovation takes place. However, in environments where the pace of change of technology and market needs is extremely high, managing service innovations means not only being able to design a good service but also, more importantly, continuously redesigning and adapting the service in order to deal with frequent exogenous changes and opportunities. A high number of innovations therefore must be introduced throughout the entire life cycle of a service. This capability of introducing incremental and radical innovations during the service life cycle (i.e., to adapt a service to contextual changes and opportunities after it has been first released onto the market) at low costs and in the shortest possible time is what is defined here as service life-cycle flexibility. This process of service adaptation and upgrading implies significant challenges that can be traced back to when a service is first conceived and designed. In fact, many decisions made during the first design process (i.e., the choice of a given database environment) involve a low reversibility rate and may reduce the possibility of taking advantage of future unpredictable opportunities, creating what is called inertia toward innovation. In other words, service life-cycle flexibility largely depends on how a service has been first designed. This article analyzes two in-depth case studies of Italian online newspapers and identifies five possible inertia factors that may influence service life-cycle flexibility, namely (1) technological inertia; (2) internal organizational inertia; (3) external organizational inertia; (4) customer inertia toward changes in the service package; and (5) customer inertia toward changes in the service interaction design. These inertia factors are traced back to the service development process in order to suggest design practices that may increase the service life-cycle flexibility. [source]

The Transition to ,New' Social Democracy: The Role of Capitalism, Representation and (Hampered) Contestation

BRITISH JOURNAL OF POLITICS & INTERNATIONAL RELATIONS, Issue 4 2009
David J. Bailey
This article argues that existing accounts of the transformation from ,traditional' to ,new' social democracy has thus far only identified the contextual changes that have prompted this move. In doing so, they have failed to account for the motives of social democratic party actors in undertaking the transition to ,new' social democracy in response to those changes. The article draws upon a critical realist method, and Marxist and anti-representational theories, to conceptualise ,traditional' social democratic party relations as suffering from tensions between constituents' demands for decommodification, the attempt by party elites to contain (and thereby ,represent') those demands and the (in)compatibility of this process of containment with the need to recommodify social relations in the light of periodic crises in contemporary capitalism. It argues that these tensions explain the attempt by party elites to promote the move towards ,new' social democracy, the (eventual) acquiescence of party constituents to those attempts and the subsequent exit from social democratic constituencies which has resulted. The argument is made with reference to the British Labour Party and Social Democratic Party of Germany (SPD). [source]