When stimuli are presented multiple times, the neural response to repeated stimuli is reduced relative to novel stimuli (repetition suppression). Responses to different types of novelty were examined. Stimulus novelty was examined by contrasting first vs. second presentation of triads of objects during memory encoding. Semantic novelty was contrasted by comparing unrelated (semantically novel) ...

Novelty-seeking personality traits are a major risk factor for the development of drug abuse and other unsafe behaviors. Rodent models of temperament indicate that high novelty responding is associated with decreased inhibitory autoreceptor control of midbrain dopamine neurons. It has been speculated that individual differences in dopamine functioning also underlie the personality trait of nove...

A B S T R A C T Introduction: In an oddball experiment, the context in which novel stimuli are presented affects characteristics of novelty P3, i.e. as long as there is a difficult task in which the difference between standard and target stimuli is small, recurrent presentation of a highly discrepant stimulus can lead to P300 highly similar to novelty P3. Effect of stimulus properties on P300 h...

The choice of the variable to flip in the Walksat family procedures is always random in that it is selected from a randomly chosen unsatisfied clause c. This choice in Novelty or R-Novelty heuristics also contains some determinism in that the variable to flip is always limited to the two best variables in c. In this paper, we first propose a diversification parameter for Novelty (or R-Novelty) ...

Novelty is often prioritized and detected automatically. It attracts attention-eliciting the orienting response. However, novelty is not a unitary concept, and the extent to which the orienting response is elicited depends on several factors. In the present study we investigated how stimulus novelty, deviance from the context, and complexity of the stimulus context contribute to the anterior N2...

One of the main motivations for the use of competitive coevolution systems is their ability to capitalise on arms races between competing species to evolve increasingly sophisticated solutions. Such arms races can, however, be hard to sustain, and it has been shown that the competing species often converge prematurely to certain classes of behaviours. In this paper, we investigate if and how no...

Cortical neurons tuned to speciic stimuli, such as orientation-selective cells of area V1, have been found to respond with greater vigour when the stimulus is unexpected ((1]). Other neurons have been found which become active in anticipation of a stimulus which has not yet arrived. This paper introduces a neural architecture and accompanying unsupervised learning algorithm which can account fo...

In the cerebellar cortex, long-term depression (LTD) of synapses between parallel &bers (PF) and Purkinje neurons can spread to neighboring ones, independently of their activation by PF input. This spread of non-speci&c LTD around the activated synapses resembles how units are a3ected in the neighborhood of the winner in a Kohonen Network (KN). However in a classic KN the weight vectors become ...

In this paper we discuss the Spectral Support Estimation algorithm [1] by analyzing its geometrical and computational properties. The estimator is non-parametric and the model selection depends on three parameters whose role is clarified by simulations on a two-dimensional space. The performance of the algorithm for novelty detection is tested and compared with its main competitors on a collect...