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Search Results: 1 - 10 of 509100 matches for " Lawrence E.M. Grierson "
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The Response Activation Model and Cross-Modal Facilitation and Inhibition of Return: A Trajectory Analysis
Lawrence E.M. Grierson, Timothy N. Welsh, Steve Hansen, Nicola J. Hodges, Spencer Hayes, James LyonsDigby Elliott
The Open Psychology Journal , 2008, DOI: 10.2174/1874350100801010035]
Abstract: Non-informative spatial cues presented prior to a goal-directed movement influence not only movement initiation time but also the spatial characteristics of the movement trajectories. These trajectory effects are thought to stem from an integration of competing motor responses. In the present experiments, trajectories of rapid aiming movements were examined under the constraints of a cue-target inhibition of return (IOR) paradigm. Aiming movements were made to targets that were preceded by a cue stimulus in the same or different location. Four experiments were conducted in which the modality of the cue and target stimulus was manipulated across vision and audition. Although facilitation effects were present under the cross modality protocols, IOR effects were observed only for same cue-target pairings. At short stimulus onset asynchronies, limb trajectories deviated toward the target that had just been cued, particularly when the cue occurred in left space. These trajectory effects are consistent with response activation models of selective attention and movement preparation.
The Impact of Prior Knowledge about Visual Feedback on Motor Performance and Learning  [PDF]
James J. Burkitt, Lawrence E. M. Grierson, Victoria Staite, Digby Elliott, James Lyons
Advances in Physical Education (APE) , 2013, DOI: 10.4236/ape.2013.31001
Abstract:

Performers adopt strategies to use visual information if they know that it will be available whereas uncertainty about its availability leads performers to prepare for the worst-case scenario. Since the impact of prior knowledge has generally been examined as performance-based changes across a series of trials, this study investigates the impact of prior knowledge on learning. Participants practiced target-directed aiming movements either with cues about the random availability of vision, no cues regarding vision or in blocks of stable visual information availability. Participants who received prior knowledge were more efficient in preparing their acquisition movements when vision was available. In retention and transfer, all participants were able to take advantage of the visual information available in order to optimize performance outcome. Thus, adult performers appear able to change their strategic behavior quickly to accommodate new sensory and prior knowledge conditions.

Production of 11alpha-hydroxyprogesterone using Aspergillus terreus immobilized on polytetrafluoroethylene
Ahmed, E.M.;
Brazilian Journal of Microbiology , 2007, DOI: 10.1590/S1517-83822007000200007
Abstract: in attempt to immobilize the mycelial fungi on a new hydrophobic matrix, aspergillus terreus mycelia were immobilized into polytetrafluoroethylen (ptfe) and used for selected conversion of progesterone to 11a-hydroxyprogesterone. the immobilized cells exhibited higher yields than the free cells. different parameters that can affect the cell activity were measured. the optimum ph was 6 and the optimum temperature was 30oc. higher transformation activities were achieved with matrix contained 40% ptfe. no considerable loss in yield was observed with storage of the cells at 4oc for 30 days. utilization of the immobilized cells in repeated batch processes indicated that the cells retained about 84% of their activity after reuse for eight successive cycles.
Tierras secas, desertificación y recursos hídricos
E.M. Abraham
Ecosistemas , 2008,
Abstract:
Over woordvorming in het Javaans
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1955,
Abstract:
Perspectief der Nederlandse ori ntalistiek
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1967,
Abstract:
De systematiek der Javaanse telwoorden
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1953,
Abstract:
Verdubbelingsprocédé’s bij het Javaanse werkwoord
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1954,
Abstract:
Woordverdubbeling in het Javaans
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1953,
Abstract:
De interpretatie van de Oud-Javaanse Ramayana-kakawin
E.M. Uhlenbeck
Bijdragen tot de Taal-, Land- en Volkenkunde , 1975,
Abstract:
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