Chapter 2 Visual imagery in locomotor movement without vision

Loarer, Even; Savoyant, Alain

doi:10.1016/s0166-4115(08)60502-6

Cited by 14 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But in the destination-unknown condition, they did not have advance knowledge of their future test location. The participants pointed with similar degrees of error in both conditions (averaging 20 and 22 degrees of error, respectively; see also Loarer & Savoyant, 1991). Similar results have been found with young children (Rider & Rieser, 1988; Rieser et al, 1994; Rieser & Rider, 1991) and for persons who are blind (Rieser et al, 1986; Talor, 1993).…”

Section: Discussionmentioning

confidence: 81%

Calibration of human locomotion and models of perceptual-motor organization.

Rieser¹,

Pick²,

Ashmead³

et al. 1995

Journal of Experimental Psychology: Human Perception and Perfor

303

410

View full text Add to dashboard Cite

People coordinate the force and direction of skilled actions with target locations and adjust the calibrations to compensate for changing circumstances. Are the adjustments globally organized (adjusting a particular action to fit a particular circumstance would generalize to all actions in the same circumstance); anatomically specific (every effector is adjusted independently of others); of functional (adjustments would generalize to all actions serving the same goal and generating the same perceptible consequences)? Across 10 experiments, changes in the calibration of walking, throwing, and turning-in-place were induced, and generalization of changes in calibration to functionally related and unrelated actions were tested. The experiments demonstrate that humans rapidly adjust the calibration of their walking, turning, and throwing to changing circumstances, and a functional model of perceptual-motor organization is suggested.

show abstract

Section: Discussionmentioning

confidence: 81%

Calibration of human locomotion and models of perceptual-motor organization.

Rieser¹,

Pick²,

Ashmead³

et al. 1995

Journal of Experimental Psychology: Human Perception and Perfor

303

410

View full text Add to dashboard Cite

show abstract

“…Our results also imply that the acquisition of the amplitude and directional components of a task may be differentially impacted by practice condition and length. Loarer and Savoyant (1991) have suggested that tasks with only a movement amplitude component are less complex than those with both amplitude and directional components. Consistent with this notion, we suggest that our results indicating differing degrees of error in movement amplitude and direction may be attributed to task complexity, (i.e., the amplitude component of the walking task was easily mastered and therefore no significant interaction between practice condition and practice length was found).…”

Section: Discussionmentioning

confidence: 99%

Is there "feedback" during visual imagery? Evidence from a specificity of practice paradigm.

Krigolson

Gyn

Tremblay

et al. 2006

Canadian Journal of Experimental Psychology / Revue canadienne

View full text Add to dashboard Cite

The specificity of practice hypothesis predicts the development of a sensorimotor representation specific to the afferent feedback available during skill acquisition (Proteau, 1992; Proteau, Marteniuk, Girouard, & Dugas, 1987). In the present investigation, we used the specificity of practice hypothesis to test whether skill acquisition through visual imagery would lead to the development of a sensory-specific movement representation similar to one resulting from actual practice. To accomplish this objective, participants practiced walking a 12-m linear path in one of three practice conditions, full-vision (FV), no-vision (NV), or visual imagery (VI), for either 10 or 100 trials. Knowledge of spatial and/or temporal results (KR) was provided to participants following each trial during this phase. Following acquisition, participants completed 10 NV trials without KR. An analysis of root-mean-squared-error (RMSE) indicated NV participants were more accurate than both FV and VI participants in the transfer condition. We believe the equivalence in transfer RMSE between FV and VI suggests that there are similarities between the movement representations attained by FV and VI practice.

show abstract

“…The entire second stage ofprocessing is referred to as path integration or dead reckoning (Fujita, Loomis, Klatzky, & Golledge, 1990;Gallistel, 1990;Israel & Berthoz, 1992;Klatzky, Beall, Loomis, Golledge, & Philbeck, 1998;Loomis et al, 1993;Maurer & Seguinot, 1995;Potegal, 1982). The third internal process is spatial (or imaginal) updating of the initially perceived target according to the estimate of the person's current location; spatial updating has been the focus of considerable research (e.g., Amorim, Glasauer, Corpinot, & Berthoz, 1997;Book & Garling, 1981;Loarer & Savoyant, 1991;Pick & Rieser, 1982;Potegal, 1971Potegal, , 1972Presson & Montello, 1994;Rieser, 1989;Rieser, Guth, & Hill, 1986;Rieser & Rider, 1991).…”

Section: Perceptually Guided Actionmentioning

confidence: 99%

Assessing auditory distance perception using perceptually directed action

Loomis

Klatzky

Philbeck

et al. 1998

Perception & Psychophysics

127

125

View full text Add to dashboard Cite

Three experiments investigated auditory distance perception under natural listening conditions in a large open field. Targets varied in egocentric distance from 3 to 16 m. By presenting visual targets at these same locations on other trials, we were able to compare visual and auditory distance perception under similar circumstances. In some experimental conditions, observers made verbal reports of target distance. In others, observers viewed or listened to the target and then, without further perceptual information about the target, attempted to face the target, walk directly to it, or walk along a two-segment indirect path to it. The primary results were these. First, the verbal and walking responses were largely concordant, with the walking responses exhibiting less between-observer variability. Second, different motoric responses provided consistent estimates of the perceived target locations and, therefore, of the initially perceived distances. Third, under circumstances for which visual targets were perceived more or less correctly in distance using the more precise walking response, auditory targets were generally perceived with considerable systematic error. In particular, the perceived locations of the auditory targets varied only about half as much in distance as did the physical targets; in addition, there was a tendency to underestimate target distance, except for the closest targets.Spatial hearing is concerned with the localization of sound sources and reflecting surfaces. In this paper, our focus is on the localization of sound sources. The egocentric location of a source is usually specified in these following coordinates: azimuth (compass direction with respect to the facing direction ofthe head), elevation, and distance. The vast majority of studies on the localization of sources has been concerned with directional hearing; only a few studies have dealt with auditory distance perception. Now, however, the emerging technology of virtual acoustics is promoting considerable interest in the topic. Virtual acoustic displays have considerable promise as interfaces between humans and computers in which "virtual" or "spatialized" sound is used to represent real and virtual environments and abstract data structures

show abstract

Chapter 2 Visual imagery in locomotor movement without vision

Cited by 14 publications

References 18 publications

Calibration of human locomotion and models of perceptual-motor organization.

Calibration of human locomotion and models of perceptual-motor organization.

Is there "feedback" during visual imagery? Evidence from a specificity of practice paradigm.

Assessing auditory distance perception using perceptually directed action

Contact Info

Product

Resources

About