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A Reinforcement Learning Model Explains the Development of Gaze Following

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Abstract:

We present a computational model that learns to follow gaze in a similar progression to that found experimentally in [1], where only at around 18-months of age infants followed gaze to objects outside their field of view, and only at 12 months of age did they start to disregard distracter objects that are along the infant’s scan path but at a wrong depth.


The proposed model provides a more biologically plausible explanation of the progression of gaze following than the model proposed in [3], and implements spatial aspects that the model in [4] lacks. Its single mechanism contrasts with the commonly held view of three separate mechanisms (–ecological-, -geometrical-, and –representational-) as first proposed by Butterworth [1]. What drives the progression of gaze following in our model is a bottom-up to top-down transition of gaze control where first gaze is directed to salient objects within the field of view, and later these saliencies are disregarded in favor of an interpretation of the signal carried by the caregiver’s head pose and eye direction. The model illustrates the importance of the saliency of targets used during experimental conditions: higher saliencies make it more difficult to disregard objects within the field of view. The effect of target saliencies is important within the current debate about the age of onset of gaze following [2].


[1] Butterworth, J., & Jarret, N. (1991). What minds have in common is space. British Journal of Developmental Psychology, 9:55-72.

[2] Deak, G. O., Flom, R.A., & Pick, A. D. (2000). Effects of Gesture and Target on 12- and 18-Month-Olds' Joint Visual Attention to Objects in Front of or Behind Them. Developmental Psychology}, 36, 511-523.

[3] Lau, B., & Triesch, J. (2004). Learning gaze following in space: a computational model. Proceedings of the Third Conference on Development and Learning (ICDL'04) La Jolla, CA.

[4] Triesch, J., Teuscher, C., Deak, G. O., & Carlson, E. (2006). Gaze Following: Why (not) learn it? Developmental Science, in press.

Author's Keywords:

Gaze following, shared attention, joint attention, reinforcement learning
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Association:
Name: XVth Biennial International Conference on Infant Studies
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http://www.isisweb.org


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URL: http://www.allacademic.com/meta/p94708_index.html
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MLA Citation:

Jasso, Hector., Triesch, Jochen., Teuscher, Christof. and Deák, Gedeon. "A Reinforcement Learning Model Explains the Development of Gaze Following" Paper presented at the annual meeting of the XVth Biennial International Conference on Infant Studies, Westin Miyako, Kyoto, Japan, Jun 19, 2006 <Not Available>. 2009-05-25 <http://www.allacademic.com/meta/p94708_index.html>

APA Citation:

Jasso, H. , Triesch, J. , Teuscher, C. and Deák, G. , 2006-06-19 "A Reinforcement Learning Model Explains the Development of Gaze Following" Paper presented at the annual meeting of the XVth Biennial International Conference on Infant Studies, Westin Miyako, Kyoto, Japan <Not Available>. 2009-05-25 from http://www.allacademic.com/meta/p94708_index.html

Publication Type: Individual Poster
Abstract: We present a computational model that learns to follow gaze in a similar progression to that found experimentally in [1], where only at around 18-months of age infants followed gaze to objects outside their field of view, and only at 12 months of age did they start to disregard distracter objects that are along the infant’s scan path but at a wrong depth.


The proposed model provides a more biologically plausible explanation of the progression of gaze following than the model proposed in [3], and implements spatial aspects that the model in [4] lacks. Its single mechanism contrasts with the commonly held view of three separate mechanisms (–ecological-, -geometrical-, and –representational-) as first proposed by Butterworth [1]. What drives the progression of gaze following in our model is a bottom-up to top-down transition of gaze control where first gaze is directed to salient objects within the field of view, and later these saliencies are disregarded in favor of an interpretation of the signal carried by the caregiver’s head pose and eye direction. The model illustrates the importance of the saliency of targets used during experimental conditions: higher saliencies make it more difficult to disregard objects within the field of view. The effect of target saliencies is important within the current debate about the age of onset of gaze following [2].


[1] Butterworth, J., & Jarret, N. (1991). What minds have in common is space. British Journal of Developmental Psychology, 9:55-72.

[2] Deak, G. O., Flom, R.A., & Pick, A. D. (2000). Effects of Gesture and Target on 12- and 18-Month-Olds' Joint Visual Attention to Objects in Front of or Behind Them. Developmental Psychology}, 36, 511-523.

[3] Lau, B., & Triesch, J. (2004). Learning gaze following in space: a computational model. Proceedings of the Third Conference on Development and Learning (ICDL'04) La Jolla, CA.

[4] Triesch, J., Teuscher, C., Deak, G. O., & Carlson, E. (2006). Gaze Following: Why (not) learn it? Developmental Science, in press.

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