Rich rewards

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Investing in distant rewards.

WOULD YOU SPEND MONEY TODAY TO MAKE THE WORLD A SUBSTANTIALLY BETTER PLACE FOR YOUR children and grandchildren? Most of us would. But what if the benefi t would accrue only to your great-great-great-great-grandchildren, not born until the 22nd century? That’s an awfully distant time horizon for most people. Many would probably spend today’s resources on more immediate concerns. Economists model...

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This paper presents a novel form of policy gradient for model-free reinforcement learning (RL) with improved exploration properties. Current policy-based methods use entropy regularization to encourage undirected exploration of the reward landscape, which is ineffective in high dimensional spaces with sparse rewards. We propose a more directed exploration strategy that promotes exploration of u...

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Resources, repositories and rewards.

Vivian Siegel is at the Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA (e-mail: [email protected]) By establishing the Resource Article section and stronger policies for materialssharing and citation, we hope to encourage and properly reward the development and sharing of resources, thereby accelerating research using model organisms to advanc...

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Using event-related fMRI, Wittmann and colleagues report in this issue of Neuron that reward value enhances cue memory and that this process is associated with midbrain modulation of hippocampal consolidation. We propose that their findings introduce a novel mechanism by which positive arousal induced by reward anticipation may promote memory.

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1 Who Rewards Diversity ?

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ژورنال

عنوان ژورنال: Nature

سال: 2003

ISSN: 0028-0836,1476-4687

DOI: 10.1038/426604b