Learning to reach to own body from spontaneous self-touch using a generative model

When leaving the aquatic constrained environment of the womb, newborns are thrown into the world with essentially new laws and regularities that govern their interactions with the environment. Here, we study how spontaneous self-contacts can provide material for learning implicit models of the body...

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Bibliographic Details
Published in:2022 IEEE International Conference on Development and Learning (ICDL) pp. 328 - 335
Main Authors: Marcel, Valentin, O'Regan, J. Kevin, Hoffmann, Matej
Format: Conference Proceeding
Language:English
Published: IEEE 12.09.2022
Subjects:
Biological system modeling
body schema
Contingency management
embodied cognition
Kinematics
learning body representation
multimodal variational autoencoder
Noise reduction
Pediatrics
Propioception
self-touch
sensorimotor contingencies
Somatosensory
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Summary:When leaving the aquatic constrained environment of the womb, newborns are thrown into the world with essentially new laws and regularities that govern their interactions with the environment. Here, we study how spontaneous self-contacts can provide material for learning implicit models of the body and its action possibilities in the environment. Specifically, we investigate the space of only somatosensory (tactile and proprioceptive) activations during self-touch configurations in a simple model agent. Using biologically motivated overlapping receptive fields in these modalities, a variational autoencoder (VAE) in a denoising framework is trained on these inputs. The denoising properties of the VAE can be exploited to fill in the missing information. In particular, if tactile stimulation is provided on a single body part, the model provides a configuration that is closer to a previously experienced self-contact configuration. Iterative passes through the VAE reconstructions create a control loop that brings about reaching for stimuli on the body. Furthermore, due to the generative properties of the model, previously unsampled proprioceptive-tactile configurations can also be achieved. In the future, we will seek a closer comparison with empirical data on the kinematics of spontaneous self-touch in infants and the results of reaching for stimuli on the body.
DOI:10.1109/ICDL53763.2022.9962186