Abstract
The uncertain option task has been recently adopted to investigate the neural systems underlying the decision confidence. Latterly single neurons activity has been recorded in lateral intraparietal cortex of monkeys performing an uncertain option task, where the subject is allowed to opt for a small but sure reward instead of making a risky perceptual decision. We propose a multiple choice model implemented in a discrete attractors network. This model is able to reproduce both behavioral and neurophysiological experimental data and therefore provides support to the numerous perspectives that interpret the uncertain option task as a sensory-motor association. The model explains the behavioral and neural data recorded in monkeys as the result of the multistable attractor landscape and produces several testable predictions. One of these predictions may help distinguish our model from a recently proposed continuous attractor model.
Highlights
Decision confidence, a simple form of metacognition, has been receiving increasing attention in neuroscience over the last ten years
Correct choices lead to reward, error choices lead to a penalty time out and the sure option yields a smaller but sure reward
A simple decision mechanism accounts for the uncertain option task Experimental task and main results
Summary
A simple form of metacognition, has been receiving increasing attention in neuroscience over the last ten years. We will concentrate on the behavioural and neural data by [3] In this experiment [3] the subjects have to decide about the prevalent direction of motion of a random dots display. Correct choices lead to reward, error choices lead to a penalty time out and the sure option yields a smaller but sure reward These trials are usually called “free choice”, since the subject is allowed to escape by choosing the sure target, compared to forced choice binary tasks. The rationale of this task is that animals should choose the uncertain option when they are less confident in the decision and prefer to avoid a probable punishment. The neural activity in lateral intraparietal sulcus (LIP) was recorded while the subjects were performing the task
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