Open research questions in Action Observation and Synchronization

What the literature leaves open

• small sample size of 21 patients, - limited to patients with major depressive disorder or social anxiety disorder, - therapists had varying levels of professional experience

  Electrodermal synchrony of patient and therapist as a predictor of alliance and outcome in psychotherapy · 2025 · DOI

• There is a lack of studies on interpersonal synchrony in CHR for psychosis. Prior work on interpersonal synchrony has focused on laboratory-assessed synchrony or intentional synchrony paradigms.

  Reduced interpersonal head synchrony in youth at clinical high risk for psychosis · 2025 · DOI

• further exploration of the temporal dimension of bodyssence, - investigation of the pivotal role that bodily resonance plays in fostering empathy for pain, - examination of bodyssence in different populations and contexts

  Empathy bodyssence: temporal dynamics of sensorimotor and physiological responses and the subjective experience in synchrony with the other’s suffering · 2024 · DOI

• The temporal structure of bodily responses and its association with the comprehension of subjective experiences remain unclear. Previous studies have not fully explored the temporal dynamics of sensorimotor and physiological responses in synchrony with the experiences of others.

  Empathy bodyssence: temporal dynamics of sensorimotor and physiological responses and the subjective experience in synchrony with the other’s suffering · 2024 · DOI

• using the database to investigate action observation research in neuroimaging settings, - incorporating the identified timings of motion onset and category recognition in future experimental designs

  An open-access database of video stimuli for action observation research in neuroimaging settings: psychometric evaluation and motion characterization · 2024 · DOI

• Lack of standardized set of video stimuli for action observation research in neuroimaging settings. Need for a database that can facilitate the investigation of both bottom-up and top-down neural processing of observed human actions.

  An open-access database of video stimuli for action observation research in neuroimaging settings: psychometric evaluation and motion characterization · 2024 · DOI

• The paper identifies a gap in our understanding of how our agency is affected by the increasing presence of digital technologies in our daily lives. It notes that the way our embodied agency plays out in non-digital contexts of interaction does not necessarily get transferred unchanged to digital contexts of interaction. The paper highlights the need to explore the interplay between embodied agency and non-embodied agency in the context of interacting with digital technologies.

  Embodiment and agency in a digital world · 2024 · DOI

• The human visual system integrates both static and dynamic information to support form and shape perception, yet the computational principles underlying the integration of motion for object recognition remain unclear.

  Divergent specializations for motion-driven representations in higher lateral and dorsal visual areas · 2026 · DOI

• Despite abundant research on embodied processing in L1, it remains unclear about the temporal characteristics of embodiment effects, particularly regarding the comparison of time courses between L1 and L2.

  The time course of embodiment effects in L1 and L2 conceptual processing: ERP evidence from Chinese-English bilinguals · 2026 · DOI

• Prediction plays a key role in both action processing and language comprehension, yet it remains unclear whether individual differences in action prediction are related to individual differences in language prediction.

  The relationship between language prediction and action prediction in toddlers and adults · 2026 · DOI

• Whether shared arousal alone can predict collective decision-making outcomes, however, remains unknown.

  Interpersonal heart rate synchrony predicts effective information processing in a naturalistic group decision-making task · 2024 · DOI

• While EM is fundamental to establish a sense of self across time, this claim and its link to the sense of agency (SoA), based on bodily signals, has not been tested experimentally.

  Embodiment in episodic memory through premotor-hippocampal coupling · 2024 · DOI

• Whether individuals with high autistic traits exhibit less cooperation remains debated.

  Not on the same wavelength? How autistic traits influence cooperation: evidence from fNIRS hyperscanning · 2024 · DOI

• Whether our optimism in this regard is warranted or not, of course, must await further application of the procedure.

  Rule-following and human operant responding: Conceptual and methodological considerations · 1987 · DOI

• The gap between the capability of large language models to acquire extensive knowledge and complex reasoning skills and their ability to control embodied agents. The need for a method that enables large language models to control embodied agents through iterative policy refinement.

  Sensory-motor control with large language models via iterative policy refinement · 2026 · DOI

• Little is known about the neural mechanisms underlying the shared experience of storytelling in children. The neural mechanisms associated with storytelling and learning outcomes are not well understood.

  Enhanced word learning and neural synchrony during children’s storytelling · 2026 · DOI

• The conjunction map classification requires voxel-level concordance across both modalities (fMRI and MEG) to assign labels, which may be overly stringent and eliminate voxels showing robust effects in single modalities. The paper does not systematically quantify how many social interaction and ToM-responsive voxels are filtered out by this conservative cross-modality approach or test whether relaxed conjunction criteria reveal additional modality-general or modality-unique neural systems.

  Common and distinct neural correlates of social interaction processing and theory of mind in narratives · 2026 · DOI

• The study restricted analysis to positive effects (positive t-statistics) for social interaction and theory of mind processing, excluding investigation of negative or suppressed neural responses during social interaction narratives. Future work should characterize whether deactivations in social brain regions and ToM networks convey distinct functional significance and whether the current methodology's exclusion of negative effects obscures important inhibitory mechanisms in social narrative comprehension.

  Common and distinct neural correlates of social interaction processing and theory of mind in narratives · 2026 · DOI

• The study identifies a gap in understanding the neural mechanisms underlying strategic social interactions. There is a need to investigate the computational processes underlying adaptive dynamics in social decision-making. The study aims to address this gap by combining computational modeling with EEG, fMRI, and causal neuromodulation.

  Alpha oscillations in the temporoparietal junction causally shift feedback-based social learning computations in strategic negotiation · 2026 · DOI

• The fMRI general linear model for the Ultimatum Game included parametric regressors for U-strategy and A-strategy but did not explicitly model alpha oscillation-based modulation of these learning computations during feedback processing. The neural mechanisms by which alpha oscillations in the temporoparietal junction causally influence trial-by-trial fluctuations in strategy expression remain unmapped.

  Alpha oscillations in the temporoparietal junction causally shift feedback-based social learning computations in strategic negotiation · 2026 · DOI

• Future research should operationalize the concept of field-level intelligence and social precision weighting. The paper suggests that future studies should quantify uncertainty dynamics in embodied interaction and identify network conditions that sustain socially shared creativity.

  Towards a theory of human creativity sustained by embodied collective intelligence · 2026 · DOI

• The current understanding of creativity is limited, and a new framework is needed to explain its collective and embodied nature. The paper identifies a gap in the understanding of how creativity is sustained and renewed across generations and communities.

  Towards a theory of human creativity sustained by embodied collective intelligence · 2026 · DOI

• The study faced challenges in scanning children and ensuring they remained still during the fMRI tasks. The study had to account for motion artifacts in the fMRI data.

  Functional dissociation of language and theory of mind in the developing superior temporal lobe · 2026 · DOI

• The study only examined the superior temporal lobe and did not consider other brain regions that may be involved in language and theory of mind. The study used a limited age range of children and did not examine the development of language and theory of mind across the entire lifespan.

  Functional dissociation of language and theory of mind in the developing superior temporal lobe · 2026 · DOI

• The study identifies a gap in the understanding of motor coordination, particularly with regards to the role of strong anticipation. The current literature lacks a clear understanding of the mechanisms underlying motor coordination. The study aims to address this gap by examining the role of complexity matching in motor coordination.

  Complexity matching: adaptive strong anticipation enhances motor coordination · 2026 · DOI

Most-cited papers in Action Observation and Synchronization

• Perceptual symbol systems · Behavioral and Brain Sciences · 1999 · 3,918 citations
• Empathy: Its ultimate and proximate bases · Behavioral and Brain Sciences · 2002 · 2,747 citations
• The Theory of Event Coding (TEC): A framework for perception and action planning · Behavioral and Brain Sciences · 2001 · 2,291 citations
• Cortical Mechanisms of Human Imitation · Science · 1999 · 1,990 citations
• An Integrated Theory of the Mind. · Psychological Review · 2004 · 1,924 citations
• The representing brain: Neural correlates of motor intention and imagery · Behavioral and Brain Sciences · 1994 · 1,806 citations
• The Social Brain: Neural Basis of Social Knowledge · Annual Review of Psychology · 2008 · 1,480 citations
• Social Cognitive Neuroscience: A Review of Core Processes · Annual Review of Psychology · 2006 · 1,462 citations
• Toward a second-person neuroscience · Behavioral and Brain Sciences · 2013 · 1,203 citations
• Research on Attention Networks as a Model for the Integration of Psychological Science · Annual Review of Psychology · 2006 · 1,113 citations

Most recent work

• Measuring Semantic Deviation: Operationalizations, Experiments, and Falsification Conditions for a Theory of Meaning as Field Deformation · Zenodo (CERN European Organization for Nuclear Research) · 2026
• Rethinking higher education: embodied learning and pedagogical transformation · Higher Education · 2026
• A neural mechanism for compositional structure transfer in humans · bioRxiv · 2026
• Respiratory and Cardiac Phase Coupling With Voluntary Actions Across Motor Tasks · Psychophysiology · 2026
• Respiratory Synchrony and Individual Differences Causally Influence Dyadic Interpersonal Coordination · Psychophysiology · 2026
• Cardiac Synchrony During Collaborative Drawing: A Longitudinal Comparison of Same Generation and Intergenerational Dyads · Annals of the New York Academy of Sciences · 2026
• Growing Technological Opacity and the Social Brain · Perspectives on Psychological Science · 2026
• Motor abstraction training generalizes to the refinement of specific movement patterns · bioRxiv · 2026
• Stand tall, think bright: How embodied experience unlocks the power of posture in emotion regulation · Acta Psychologica · 2026
• Aesthetic speed preferences when viewing dance synchronize to a ‘natural’ pace of human movement · Cognition · 2026

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