underlying word-form learning and the Hebb repetition effect? Experimental data and a modelling framework

. The model provides an explanatory mechanism for the phonological loop, and for the effects of serial position, presentation modality, lexicality, grouping and Hebb repetition. It makes new psychological and neuropsychological predictions and is a starting point for understanding the role

of repetition, performance was tested on transfer lists in which half the items held the same position as in the repeated list (S-items), the remainder moved (D-items). In Experiment 1, S-items showed a small advantage over control and D-items, in order errors. A second experiment tested whether a design

ii In an immediate serial recall task, participants are asked to recall lists of items in order. In the Hebb repeating-list variant of the task, subjects are read a series of lists, and every third list is repeated. Performance improves across repetitions but is stable for the non-repeated trials

.g., Rubner and Schulten 1990; FoldiAk 1990). Here we show that the simple anti-Hebbian synapses alone can support an important computational function: solving simultaneous linear equations. During repetitive learning with a simple anti-Hebb rule, the weights onto an output unit always converge to the exact

and the extent of synaptic changes. Repetitive postsynaptic spiking within a time window of 20 msec after presynaptic activation resulted in long-term potentiation (LTP), whereas postsynaptic spiking within a window of 20 msec before the repetitive presynaptic activation led to long-term depression (LTD

The synaptic basis for learning suggested by Hebb (1949), Marr's theory (1969) for motor learning in the cerebellum, and Stent's mechanism (1973) for synaptic depression in visual cortex depend on coincidences between presynaptic and postsynaptic events. Two statistical constraints

search using the term neuroplasticity b and ence or repetition to induce lasting takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A's efficiency, as one Available online at www.sciencedirect.com Surgical Neurology 71 (20revealed 1319