Illusory causal crescents: Misperceived spatial relations due to perceived causality. Scholl, B. J & Nakayama, K. Perception, 33(4):455-69, 2004. abstract bibtex When an object A moves toward an object B until they are adjacent, at which point A stops and B starts moving, we often see a collision–ie we see A as the cause of B's motion. The spatiotemporal parameters which mediate the perception of causality have been explored in many studies, but this work is seldom related to other aspects of perception. Here we report a novel illusion, wherein the perception of causality affects the perceived spatial relations among two objects involved in a collision event: observers systematically underestimate the amount of overlap between two items in an event which is seen as a causal collision. This occurs even when the causal nature of the event is induced by a surrounding context, such that estimates of the amount of overlap in the very same event are much improved when the event is displayed in isolation, without a 'causal' interpretation. This illusion implies that the perception of causality does not proceed completely independently of other visual processes, but can affect the perception of other spatial properties.
@Article{Scholl2004,
author = {Brian J Scholl and Ken Nakayama},
journal = {Perception},
title = {Illusory causal crescents: {M}isperceived spatial relations due to perceived causality.},
year = {2004},
number = {4},
pages = {455-69},
volume = {33},
abstract = {When an object A moves toward an object B until they are adjacent,
at which point A stops and B starts moving, we often see a collision--ie
we see A as the cause of B's motion. The spatiotemporal parameters
which mediate the perception of causality have been explored in many
studies, but this work is seldom related to other aspects of perception.
Here we report a novel illusion, wherein the perception of causality
affects the perceived spatial relations among two objects involved
in a collision event: observers systematically underestimate the
amount of overlap between two items in an event which is seen as
a causal collision. This occurs even when the causal nature of the
event is induced by a surrounding context, such that estimates of
the amount of overlap in the very same event are much improved when
the event is displayed in isolation, without a 'causal' interpretation.
This illusion implies that the perception of causality does not proceed
completely independently of other visual processes, but can affect
the perception of other spatial properties.},
keywords = {Abscess, Adult, Age Factors, Animal, Animals, Anti-Bacterial Agents, Antineoplastic Agents, Attention, Awareness, Axilla, Behavior, Biopsy, Breast Neoplasms, Carcinoma, Child Development, Combined Modality Therapy, Computer-Assisted, Concept Formation, Consciousness, Cues, Discrimination (Psychology), Discrimination Learning, Distance Perception, Drainage, Ductal, English Abstract, Extramural, Eye Movements, False Negative Reactions, Female, Field Dependence-Independence, Fine-Needle, Health Care, Humans, Infant, Infant Behavior, Intraductal, Judgment, Lymph Node Excision, Lymph Nodes, Lymphatic Metastasis, Macaca mulatta, Male, Mastitis, Memory, Motion Perception, N.I.H., Neoadjuvant Therapy, Neoplasm Staging, Non-P.H.S., Non-U.S. Gov't, Noninfiltrating, Object Attachment, Optical Illusions, Orientation, P.H.S., Pattern Recognition, Photic Stimulation, Practice (Psychology), Practice Guidelines, Predictive Value of Tests, Problem Solving, Prognosis, Psychological Theory, Psychophysics, Puerperal Disorders, Quality Assurance, Reading, Reproducibility of Results, Research Support, Rotation, Semantics, Sentinel Lymph Node Biopsy, Set (Psychology), Short-Term, Space Perception, Surgery, Switzerland, Treatment Outcome, U.S. Gov't, Unconscious (Psychology), Visual, Visual Perception, 15222393},
}
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Here we report a novel illusion, wherein the perception of causality affects the perceived spatial relations among two objects involved in a collision event: observers systematically underestimate the amount of overlap between two items in an event which is seen as a causal collision. This occurs even when the causal nature of the event is induced by a surrounding context, such that estimates of the amount of overlap in the very same event are much improved when the event is displayed in isolation, without a 'causal' interpretation. This illusion implies that the perception of causality does not proceed completely independently of other visual processes, but can affect the perception of other spatial properties.","keywords":"Abscess, Adult, Age Factors, Animal, Animals, Anti-Bacterial Agents, Antineoplastic Agents, Attention, Awareness, Axilla, Behavior, Biopsy, Breast Neoplasms, Carcinoma, Child Development, Combined Modality Therapy, Computer-Assisted, Concept Formation, Consciousness, Cues, Discrimination (Psychology), Discrimination Learning, Distance Perception, Drainage, Ductal, English Abstract, Extramural, Eye Movements, False Negative Reactions, Female, Field Dependence-Independence, Fine-Needle, Health Care, Humans, Infant, Infant Behavior, Intraductal, Judgment, Lymph Node Excision, Lymph Nodes, Lymphatic Metastasis, Macaca mulatta, Male, Mastitis, Memory, Motion Perception, N.I.H., Neoadjuvant Therapy, Neoplasm Staging, Non-P.H.S., Non-U.S. Gov't, Noninfiltrating, Object Attachment, Optical Illusions, Orientation, P.H.S., Pattern Recognition, Photic Stimulation, Practice (Psychology), Practice Guidelines, Predictive Value of Tests, Problem Solving, Prognosis, Psychological Theory, Psychophysics, Puerperal Disorders, Quality Assurance, Reading, Reproducibility of Results, Research Support, Rotation, Semantics, Sentinel Lymph Node Biopsy, Set (Psychology), Short-Term, Space Perception, Surgery, Switzerland, Treatment Outcome, U.S. Gov't, Unconscious (Psychology), Visual, Visual Perception, 15222393","bibtex":"@Article{Scholl2004,\n author = {Brian J Scholl and Ken Nakayama},\n journal = {Perception},\n title = {Illusory causal crescents: {M}isperceived spatial relations due to perceived causality.},\n year = {2004},\n number = {4},\n pages = {455-69},\n volume = {33},\n abstract = {When an object A moves toward an object B until they are adjacent,\n\tat which point A stops and B starts moving, we often see a collision--ie\n\twe see A as the cause of B's motion. The spatiotemporal parameters\n\twhich mediate the perception of causality have been explored in many\n\tstudies, but this work is seldom related to other aspects of perception.\n\tHere we report a novel illusion, wherein the perception of causality\n\taffects the perceived spatial relations among two objects involved\n\tin a collision event: observers systematically underestimate the\n\tamount of overlap between two items in an event which is seen as\n\ta causal collision. 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