TY  - CONF
AU  - Riemer, Martin
AU  - Wolbers, Thomas
TI  - First person perspective: A methodological constraintfor path integration studies?
JO  - Cognitive processing
VL  - 16
SN  - 1612-4782
M1  - DZNE-2020-00664
SP  - S60
PY  - 2015
AB  - * Background: Studies on path integration are constrained by the factthat spatial distances are always perceived from the vantage point ofthe body. A spatial distance cannot be perceived per se, but only from the  first  person  perspective. This  constraint  potentially affects production  tasks, in which  participants  are asked  to cover a  previouslylearned standard distance, and discrimination tasks, in which participants have to compare the lengths of two travelled paths. However, responses in reproduction tasks are given while the  participant  ismoving  along  the  path  to  be  estimated, whereas  judgments  in  dis-crimination  tasks are required  only  after  both  distances have beencompleted.* Aims: It was tested whether distance reproduction and distance dis-crimination  are  differentially  affected  by  an  egocentric  coding  ofspace.* Method:  Using  an  immersive  virtual  environment  set-up,  subjects performed  distance  discrimination  and  reproduction  tasks.  Interfer-ence  with  egocentric  spatial  coding was  induced by  repetitive TMSover the right posterior parietal cortex (PPC).Results:  We  report  differential effects  on  the  two  psychophysicaltasks. In distance discrimination, TMS selectively decreased responsevariability, while the mean accuracy of judgments was unaffected. Indistance reproduction,  TMS  had a selective  effect  on  judgment accuracy, while response variability was not affected.* Conclusions:  Errors  in  distance  reproduction  do  not  coincide  with judgment accuracy, but rather with altered judgment precision. These results  allude  to  an  inherent  difference  between discrimination and reproduction tasks, which can be traced back to a differential impactof the first person perspective on spatial distance perception.
T2  - VI. International Conference on Spatial Cognition
CY  - 7 Sep 2015 - 11 Sep 2015, Rome (Italy)
Y2  - 7 Sep 2015 - 11 Sep 2015
M2  - Rome, Italy
LB  - PUB:(DE-HGF)1 ; PUB:(DE-HGF)16
UR  - https://pub.dzne.de/record/145308
ER  -