Dataset Information

Communication and Inference of Intended Movement Direction during Human-Human Physical Interaction.

ABSTRACT: Of particular interest to the neuroscience and robotics communities is the understanding of how two humans could physically collaborate to perform motor tasks such as holding a tool or moving it across locations. When two humans physically interact with each other, sensory consequences and motor outcomes are not entirely predictable as they also depend on the other agent's actions. The sensory mechanisms involved in physical interactions are not well understood. The present study was designed (1) to quantify human-human physical interactions where one agent ("follower") has to infer the intended or imagined-but not executed-direction of motion of another agent ("leader") and (2) to reveal the underlying strategies used by the dyad. This study also aimed at verifying the extent to which visual feedback (VF) is necessary for communicating intended movement direction. We found that the control of leader on the relationship between force and motion was a critical factor in conveying his/her intended movement direction to the follower regardless of VF of the grasped handle or the arms. Interestingly, the dyad's ability to communicate and infer movement direction with significant accuracy improved (>83%) after a relatively short amount of practice. These results indicate that the relationship between force and motion (interpreting as arm impedance modulation) may represent an important means for communicating intended movement direction between biological agents, as indicated by the modulation of this relationship to intended direction. Ongoing work is investigating the application of the present findings to optimize communication of high-level movement goals during physical interactions between biological and non-biological agents.

SUBMITTER: Mojtahedi K

PROVIDER: S-EPMC5390012 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Communication and Inference of Intended Movement Direction during Human-Human Physical Interaction.

Mojtahedi Keivan K Whitsell Bryan B Artemiadis Panagiotis P Santello Marco M

Frontiers in neurorobotics 20170413

Of particular interest to the neuroscience and robotics communities is the understanding of how two humans could physically collaborate to perform motor tasks such as holding a tool or moving it across locations. When two humans physically interact with each other, sensory consequences and motor outcomes are not entirely predictable as they also depend on the other agent's actions. The sensory mechanisms involved in physical interactions are not well understood. The present study was designed (1 ...[more]

PMID: 28450834

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Project description:Recent theoretical work in developmental psychology suggests that humans are predisposed to align their mental states with those of other individuals. One way this manifests is in cooperative communication; that is, intentional communication aimed at aligning individuals' mental states with respect to events in their shared environment. This idea has received strong empirical support. The purpose of this paper is to extend this account by proposing an integrative model of the biobehavioral dynamics of cooperative communication. Our formulation is based on active inference. Active inference suggests that action-perception cycles operate to minimize uncertainty and optimize an individual's internal model of the world. We propose that humans are characterized by an evolved adaptive prior belief that their mental states are aligned with, or similar to, those of conspecifics (i.e., that 'we are the same sort of creature, inhabiting the same sort of niche'). The use of cooperative communication emerges as the principal means to gather evidence for this belief, allowing for the development of a shared narrative that is used to disambiguate interactants' (hidden and inferred) mental states. Thus, by using cooperative communication, individuals effectively attune to a hermeneutic niche composed, in part, of others' mental states; and, reciprocally, attune the niche to their own ends via epistemic niche construction. This means that niche construction enables features of the niche to encode precise, reliable cues about the deontic or shared value of certain action policies (e.g., the utility of using communicative constructions to disambiguate mental states, given expectations about shared prior beliefs). In turn, the alignment of mental states (prior beliefs) enables the emergence of a novel, contextualizing scale of cultural dynamics that encompasses the actions and mental states of the ensemble of interactants and their shared environment. The dynamics of this contextualizing layer of cultural organization feedback, across scales, to constrain the variability of the prior expectations of the individuals who constitute it. Our theory additionally builds upon the active inference literature by introducing a new set of neurobiologically plausible computational hypotheses for cooperative communication. We conclude with directions for future research.

Project description:BackgroundThe majority of patients desire all available prognostic information, but some physicians hesitate to discuss prognosis. The objective of the current study was to examine outcomes of prognostic disclosure among the parents of children with cancer.MethodsThe authors surveyed 353 parents of children with newly diagnosed cancer at 2 tertiary cancer centers, and each child's oncologist. Using multivariable logistic regression, the authors assessed associations between parental report of elements of prognosis discussions with the oncologist (quality of information/communication and prognostic disclosure) and potential consequences of these discussions (trust, hope, peace of mind, prognostic understanding, depression, and anxiety). Analyses were stratified by oncologist-reported prognosis.ResultsPrognostic disclosure was not found to be associated with increased parental anxiety, depression, or decreased hope. Among the parents of children with less favorable prognoses (<75% chance of cure), the receipt of high-quality information from the oncologist was associated with greater peace of mind (odds ratio [OR], 5.23; 95% confidence interval [95% CI], 1.81-15.16) and communication-related hope (OR, 2.54; 95% CI, 1.00-6.40). High-quality oncologist communication style was associated with greater trust in the physician (OR, 2.45; 95% CI, 1.09-5.48) and hope (OR, 3.01; 95% CI, 1.26-7.19). Accurate prognostic understanding was less common among the parents of children with less favorable prognoses (OR, 0.39; 95% CI, 0.17-0.88). Receipt of high-quality information, high-quality communication, and prognostic disclosure were not found to be significantly associated with more accurate prognostic understanding.ConclusionsThe results of the current study demonstrate no evidence that disclosure is associated with anxiety, depression, or decreased hope. Communication processes may increase peace of mind, trust, and hope. It remains unclear how best to enhance prognostic understanding. Cancer 2018;124:1232-41. © 2017 American Cancer Society.

Dataset Information

Communication and Inference of Intended Movement Direction during Human-Human Physical Interaction.

Publications

Communication and Inference of Intended Movement Direction during Human-Human Physical Interaction.

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