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Human manual control performance in hyper-gravity
| Content Provider | Semantic Scholar |
|---|---|
| Author | Clark, Torin K. Newman, Michael C. Merfeld, Daniel M. Oman, Charles M. Young, Laurence R. |
| Copyright Year | 2015 |
| Abstract | Hyper-gravity provides a unique environment to study how misperceptions impact control of orientation relative to gravity. Previous studies have found that static and dynamic roll tilts are perceptually overestimated in hyper-gravity. The current investigation quantifies how this influences control of orientation. We utilized a long-radius centrifuge to study manual control performance in hyper-gravity. In the dark, subjects were tasked with nulling out a pseudo-random roll disturbance on the cab of the centrifuge using a rotational hand controller to command their roll rate in order to remain perceptually upright. The task was performed in 1, 1.5, and 2 G's of net gravito-inertial acceleration. Initial performance, in terms of root-mean-square deviation from upright, degraded in hyper-gravity relative to 1 G performance levels. In 1.5 G, initial performance degraded by 26 % and in 2 G, by 45 %. With practice, however, performance in hyper-gravity improved to near the 1 G performance level over several minutes. Finally, pre-exposure to one hyper-gravity level reduced initial performance decrements in a different, novel, hyper-gravity level. Perceptual overestimation of roll tilts in hyper-gravity leads to manual control performance errors, which are reduced both with practice and with pre-exposure to alternate hyper-gravity stimuli. |
| Starting Page | 1409 |
| Ending Page | 1420 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s00221-015-4215-y |
| PubMed reference number | 25651980 |
| Journal | Medline |
| Volume Number | 233 |
| Alternate Webpage(s) | https://dspace.mit.edu/openaccess-disseminate/1721.1/107159 |
| Alternate Webpage(s) | http://dspace.mit.edu/openaccess-disseminate/1721.1/107159 |
| Journal | Experimental Brain Research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
