For navigation through our environment, we can rely on information from various modalities, such as vision and audition. This information enables us for example to estimate our position relative to the starting position, or to integrate velocity and acceleration signals from the vestibular organ and proprioception to estimate the displacement due to self-motion. To better understand the mechanisms that underlie human navigation we analysed the performance of participants in an angle-walking task in the absence of visual and auditory signals. To this end, we guided them along paths of different lengths and asked them to turn by an angle of ±90°. We found significant biases in turn angles, i.e. systematic deviations from the correct angle and that these were characteristic for individual participants. Varying path length, however, had little effect on turn accuracy and precision. To check whether this idiosyncrasy was persistent over time and present in another type of walking task, we performed a second experiment several weeks later. Here, the same participants were guided to walk angles with varying amplitude. We then asked them to judge whether they had walked an angle larger or smaller than 90° in a two-alternative forced-choice paradigm. The personal bias was highly correlated between the two experiments even though they were conducted weeks apart. The presence of a persistent bias in walked angles in the absence of external directional cues indicates a possible error component for navigation, which is surprisingly time stable and idiosyncratic.

Jetzschke, S., Ernst, M.o., Moscatelli, A., Boeddeker, N. (2016). Going round the bend: Persistent personal biases in walked angles. NEUROSCIENCE LETTERS, 617, 72-75 [10.1016/j.neulet.2016.01.026].

Going round the bend: Persistent personal biases in walked angles

Moscatelli A.;
2016-01-01

Abstract

For navigation through our environment, we can rely on information from various modalities, such as vision and audition. This information enables us for example to estimate our position relative to the starting position, or to integrate velocity and acceleration signals from the vestibular organ and proprioception to estimate the displacement due to self-motion. To better understand the mechanisms that underlie human navigation we analysed the performance of participants in an angle-walking task in the absence of visual and auditory signals. To this end, we guided them along paths of different lengths and asked them to turn by an angle of ±90°. We found significant biases in turn angles, i.e. systematic deviations from the correct angle and that these were characteristic for individual participants. Varying path length, however, had little effect on turn accuracy and precision. To check whether this idiosyncrasy was persistent over time and present in another type of walking task, we performed a second experiment several weeks later. Here, the same participants were guided to walk angles with varying amplitude. We then asked them to judge whether they had walked an angle larger or smaller than 90° in a two-alternative forced-choice paradigm. The personal bias was highly correlated between the two experiments even though they were conducted weeks apart. The presence of a persistent bias in walked angles in the absence of external directional cues indicates a possible error component for navigation, which is surprisingly time stable and idiosyncratic.
2016
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/09 - FISIOLOGIA
English
Con Impact Factor ISI
Dead reckoning; Human navigation; Idiosyncratic biases; Path integration; Walking; Adult; Choice Behavior; Discrimination (Psychology); Female; Humans; Male; Middle Aged; Time Factors; Young Adult; Spatial Navigation
Jetzschke, S., Ernst, M.o., Moscatelli, A., Boeddeker, N. (2016). Going round the bend: Persistent personal biases in walked angles. NEUROSCIENCE LETTERS, 617, 72-75 [10.1016/j.neulet.2016.01.026].
Jetzschke, S; Ernst, Mo; Moscatelli, A; Boeddeker, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/193270
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