UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Action perception as hypothesis testing

Donnarumma, F; Costantini, M; Ambrosini, E; Friston, K; Pezzulo, G; (2017) Action perception as hypothesis testing. Cortex , 89 pp. 45-60. 10.1016/j.cortex.2017.01.016. Green open access

[img]
Preview
Text
1-s2.0-S0010945217300308-main.pdf - ["content_typename_Published version" not defined]

Download (2MB) | Preview

Abstract

We present a novel computational model that describes action perception as an active inferential process that combines motor prediction (the reuse of our own motor system to predict perceived movements) and hypothesis testing (the use of eye movements to disambiguate amongst hypotheses). The system uses a generative model of how (arm and hand) actions are performed to generate hypothesis-specific visual predictions, and directs saccades to the most informative places of the visual scene to test these predictions - and underlying hypotheses. We test the model using eye movement data from a human action observation study. In both the human study and our model, saccades are proactive whenever context affords accurate action prediction; but uncertainty induces a more reactive gaze strategy, via tracking the observed movements. Our model offers a novel perspective on action observation that highlights its active nature based on prediction dynamics and hypothesis testing.

Type: Article
Title: Action perception as hypothesis testing
Location: Italy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cortex.2017.01.016
Publisher version: http://doi.org/10.1016/j.cortex.2017.01.016
Language: English
Additional information: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons. org/licenses/by/4.0/).
Keywords: Action observation, Active inference, Active perception, Hypothesis testing, Motor prediction
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
URI: http://discovery.ucl.ac.uk/id/eprint/1543320
Downloads since deposit
99Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item