PMID- 14629684
OWN - NLM
STAT- MEDLINE
DCOM- 20040114
LR  - 20170214
IS  - 0956-7976 (Print)
IS  - 0956-7976 (Linking)
VI  - 14
IP  - 6
DP  - 2003 Nov
TI  - Static scene analysis for the perception of heading.
PG  - 543-8
AB  - In the current study, we explored observers' use of two distinct analyses for 
      determining their direction of motion, or heading: a scene-based analysis and a 
      motion-based analysis. In two experiments, subjects viewed sequentially 
      presented, paired digitized images of real-world scenes and judged the direction 
      of heading; the pairs were presented with various interstimulus intervals (ISIs). 
      In Experiment 1, subjects could determine heading when the two frames were 
      separated with a 1,000-ms ISI, long enough to eliminate apparent motion. In 
      Experiment 2, subjects performed two tasks, a path-of-motion task and a 
      memory-load task, under three different ISIs, 50 ms, 500 ms, and 1,000 ms. 
      Heading accuracy decreased with an increase in ISI. Increasing memory load 
      influenced heading judgments only for the longer ISI when motion-based 
      information was not available. These results are consistent with the hypothesis 
      that the scene-based analysis has a coarse spatial representation, is a sustained 
      temporal process, and is capacity limited, whereas the motion-based analysis has 
      a fine spatial resolution, is a transient temporal process, and is capacity 
      unlimited.
FAU - Hahn, Sowon
AU  - Hahn S
AD  - University of California at Riverside, USA.
FAU - Andersen, George J
AU  - Andersen GJ
FAU - Saidpour, Asad
AU  - Saidpour A
LA  - eng
GR  - EY012437/EY/NEI NIH HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - United States
TA  - Psychol Sci
JT  - Psychological science
JID - 9007542
SB  - IM
MH  - Cues
MH  - Humans
MH  - Judgment
MH  - Locomotion
MH  - *Motion Perception
MH  - Space Perception
MH  - *Visual Perception
EDAT- 2003/11/25 05:00
MHDA- 2004/01/15 05:00
CRDT- 2003/11/25 05:00
PHST- 2003/11/25 05:00 [pubmed]
PHST- 2004/01/15 05:00 [medline]
PHST- 2003/11/25 05:00 [entrez]
AID - psci_1463 [pii]
AID - 10.1046/j.0956-7976.2003.psci_1463.x [doi]
PST - ppublish
SO  - Psychol Sci. 2003 Nov;14(6):543-8. doi: 10.1046/j.0956-7976.2003.psci_1463.x.