Actions as perceptual experiments.

No prior work had resolved how physical movement actively shapes our internal representation of the external world. It was already known that humans constantly interact with their environment through various motor behaviors. However, the exact mechanism linking these motor outputs to spatial awareness remained poorly understood. This gap motivated researchers to investigate the relationship between active movement and sensory localization. Prior research has shown that sensory systems rely on internal models to predict environmental states. Yet, the specific role of motor activity in updating these models was unclear. That uncertainty drove the need for a comprehensive review of existing behavioral evidence. Scientists have long debated whether perception is a static process or a dynamic, iterative cycle. This article addresses that debate by synthesizing evidence on how motor actions function as experimental probes.

The aim of this review is to examine how physical actions function as experiments that test and recalibrate internal spatial hypotheses. The authors seek to resolve the uncertainty regarding whether perception is a passive or active process. This study addresses the specific problem of how the brain maintains accurate spatial awareness despite constant environmental changes. The researchers are motivated by the need to understand the link between motor output and sensory updating. They investigate how various motor behaviors, such as eye movements and walking, contribute to this recalibration. By synthesizing existing literature, the study aims to provide a comprehensive view of active perception. The authors focus on identifying the mechanisms that allow the brain to compare expected and sensed motion. This work clarifies how internal predictions are continuously probed through our daily physical interactions.

Review approach involves synthesizing behavioral data across multiple motor domains including eye movements and locomotion. The authors analyze findings from studies examining saccadic errors and their impact on visual localization. They evaluate evidence regarding how velocity-gain perturbations during gaze shifts influence head kinematics. The investigation includes a critical assessment of how optic-flow manipulations affect walking distance and depth perception. Researchers also examine temporal reproduction tasks to determine if motor-based dependencies extend to time estimation. This synthesis integrates diverse experimental paradigms to construct a unified model of active perception. The approach focuses on identifying consistent patterns in how motor output recalibrates internal spatial predictions. By comparing results from different sensory modalities, the authors map the functional relationship between movement and environmental awareness.

Key findings from the literature demonstrate that actions act as experiments which test and recalibrate internal spatial hypotheses. Postsaccadic errors from approximately 100,000 daily saccades induce serial dependencies that shift visual localization. During eye-head gaze shifts, the brain compares expected self-generated motion with sensed motion to adjust perception. Subtle velocity-gain perturbations bias both perception and head kinematics during these movements. In locomotion, manipulating optic-flow speed changes walked distance and subsequently rescales perceived depth. Temporal reproduction shows serial dependence within action but little transfer to visual time perception. These results support a unifying perspective on visual space perception as a permanent and active probing of internal predictions. The evidence confirms that motor activity is integral to maintaining accurate spatial representations.

The authors propose that visual space perception functions as a continuous, active investigation of internal environmental predictions. Synthesis and implications suggest that motor behaviors serve as essential experiments for refining spatial maps. These findings indicate that serial dependencies in eye movements directly influence how humans localize objects. The researchers argue that the brain uses self-generated motion to calibrate its sensory expectations. Evidence shows that manipulating optic flow during walking alters both distance estimation and perceived depth. The authors conclude that action-based recalibration is a fundamental feature of human sensory processing. This review highlights that while spatial perception is deeply tied to action, temporal perception appears more isolated. The work provides a unifying framework for understanding how movement and perception remain permanently linked.