Coordination effort in joint action is reflected in pupil size

A hard choice for Tomasello

Behavioral and Brain Sciences ◽

10.1017/s0140525x19002346 ◽

2020 ◽

Vol 43 ◽

Author(s):

Philip Pettit

Keyword(s):

Joint Action ◽

The Other ◽

Hard Choice ◽

Margaret Gilbert ◽

Michael Bratman ◽

Human Sense ◽

Sense Of Obligation

Abstract Michael Tomasello explains the human sense of obligation by the role it plays in negotiating practices of acting jointly and the commitments they underwrite. He draws in his work on two models of joint action, one from Michael Bratman, the other from Margaret Gilbert. But Bratman's makes the explanation too difficult to succeed, and Gilbert's makes it too easy.

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Social epistemic actions

Behavioral and Brain Sciences ◽

10.1017/s0140525x19002802 ◽

2020 ◽

Vol 43 ◽

Author(s):

Giovanni Pezzulo ◽

Laura Barca ◽

Domenico Maisto ◽

Francesco Donnarumma

Keyword(s):

Social Interaction ◽

Joint Action ◽

Niche Construction ◽

Cultural Practices ◽

Learning Processes ◽

Epistemic Actions ◽

Target Article ◽

Online Social Interaction

Abstract We consider the ways humans engage in social epistemic actions, to guide each other's attention, prediction, and learning processes towards salient information, at the timescale of online social interaction and joint action. This parallels the active guidance of other's attention, prediction, and learning processes at the longer timescale of niche construction and cultural practices, as discussed in the target article.

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How Socially Relevant Visual Characteristics of Avatars Influence Impression Formation

Journal of Media Psychology Theories Methods and Applications ◽

10.1027/1864-1105/a000005 ◽

2010 ◽

Vol 22 (1) ◽

pp. 37-43 ◽

Cited By ~ 13

Author(s):

David Weibel ◽

Daniel Stricker ◽

Bartholomäus Wissmath ◽

Fred W. Mast

Keyword(s):

Impression Formation ◽

Pupil Size ◽

Conscious Perception ◽

Viewing Angle ◽

Frontal View ◽

Computer Mediated ◽

First Impression ◽

Visual Characteristics ◽

Socially Relevant ◽

Blink Frequency

Like in the real world, the first impression a person leaves in a computer-mediated environment depends on his or her online appearance. The present study manipulates an avatar’s pupil size, eyeblink frequency, and the viewing angle to investigate whether nonverbal visual characteristics are responsible for the impression made. We assessed how participants (N = 56) evaluate these avatars in terms of different attributes. The findings show that avatars with large pupils and slow eye blink frequency are perceived as more sociable and more attractive. Compared to avatars seen in full frontal view or from above, avatars seen from below were rated as most sociable, self-confident, and attractive. Moreover, avatars’ pupil size and eyeblink frequency escape the viewer’s conscious perception but still influence how people evaluate them. The findings have wide-ranging applied implications for avatar design.

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