Related Experiment Video
Updated: Jul 5, 2026
06:12
Virtual Prism Adaptation Therapy: Protocol for Validation in Healthy Adults
Published on: February 12, 2020
Online corrections can produce illusory bias during closed-loop pointing
C Ehresman1, D Saucier, M Heath
1Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, Canada. deborah.saucier@uleth.ca
Experimental Brain Research
|April 23, 2008
Summary
Pictorial illusions influence goal-directed movements by affecting eye movements, specifically corrective saccades. This suggests a shared spatial representation for both perception and action in manual and oculomotor systems.
Area of Science:
- Cognitive Neuroscience
- Motor Control
- Visual Perception
Background:
- Pictorial illusions can affect motor execution.
- The role of ocular motor signaling in this effect is not fully understood.
Purpose of the Study:
- To investigate if ocular motor signaling mediates the impact of pictorial illusions on goal-directed reaching movements.
- To determine if a common spatial representation underlies perception and action.
Main Methods:
- Participants performed pointing movements to the Müller-Lyer (ML) figure under control and experimental conditions.
- Eye and hand movements were analyzed during closed-loop reaching.
- Stimuli were presented unchanged or perturbed from neutral to illusory configurations at movement onset.
Main Results:
- Action-bias was present in both conditions, with illusory bias introduced during online control.
- Primary saccades were influenced by illusory configurations in control conditions.
- Illusory bias emerged in secondary corrective saccades during experimental trials.
Conclusions:
- The findings support a unitary spatial representation for both action and perception.
- This representation appears to be common to both manual and oculomotor systems.
- Ocular motor signaling plays a role in integrating visual illusions into motor commands.
More Related Videos
Related Concept Videos
01:17Correspondence Bias
Correspondence bias, also referred to as the fundamental attribution error, describes the tendency to attribute another person’s behavior to internal characteristics rather than situational influences. This cognitive bias leads individuals to overlook external factors that may be influencing actions, thereby fostering potentially inaccurate assessments of others’ intentions and dispositions.Empirical Evidence for Correspondence BiasResearch has consistently demonstrated the prevalence of...
01:53Cause and Effect
While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?
01:31Confirmation Biases
The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
01:12Hindsight Biases
Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now?
01:22Bias
Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...
01:15Theory of Attribution I: Correspondent Inference Theory
Correspondent inference theory, proposed by Jones and Davis in 1965, seeks to explain how individuals infer stable personality traits from observed behaviors. It suggests that people attribute actions to underlying dispositions rather than external circumstances, particularly when the behavior appears intentional and socially significant.Voluntary Behavior and Dispositional AttributionAccording to this theory, individuals are more likely to attribute behavior to personal traits when it appears...