PMID- 23588421
OWN - NLM
STAT- MEDLINE
DCOM- 20131211
LR  - 20211021
IS  - 1432-1106 (Electronic)
IS  - 0014-4819 (Linking)
VI  - 227
IP  - 2
DP  - 2013 Jun
TI  - Time perception during apparent biological motion reflects subjective speed of 
      movement, not objective rate of visual stimulation.
PG  - 223-9
LID - 10.1007/s00221-013-3502-8 [doi]
AB  - We have investigated links between biological motion perception and time 
      perception. Participants compared the durations of two paired visual frames, 
      inside which task-irrelevant sequences of static body postures were presented. 
      The sequences produced apparent movements of shorter and longer path lengths, 
      depending on the sequential order of body postures (ABC or ACB). Shorter and 
      longer path lengths were paired with shorter and longer interstimulus intervals 
      (ISIs) to produce path/ISI congruent sequences with intermediate subjective 
      speeds and path/ISI incongruent sequences with slowest and fastest subjective 
      speeds. Participants compared the duration of the visual frames surrounding these 
      sequences; body postures and biological motion were irrelevant. The ability to 
      discriminate the duration of the frames (as measured by the just noticeable 
      difference, JND) was reduced for pairs of path/ISI congruent sequences as 
      compared to pairs of path/ISI incongruent sequences. That is, duration 
      discrimination improved when implied speed differed between the two sequences of 
      a pair compared to when the implied speed was the same. Since stimuli showed no 
      actual movement and were fully matched for lower-level visual input and objective 
      stimulus durations, our findings suggest an involvement of higher-order visual or 
      even motor areas in temporal biases during apparent biological motion perception. 
      We show that apparent speed is the primary dimension of such percepts consistent 
      with a dominant role of movement dynamics in the perception of other people's 
      actions. Our results also confirm an intimate relation between time perception 
      and processing of human movement.
FAU - Orgs, Guido
AU  - Orgs G
AD  - Institute of Cognitive Neuroscience, University College London, Alexandra House, 
      17 Queen Square, London WC1N 3AR, UK. g.orgs@ucl.ac.uk
FAU - Kirsch, Louise
AU  - Kirsch L
FAU - Haggard, Patrick
AU  - Haggard P
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130416
PL  - Germany
TA  - Exp Brain Res
JT  - Experimental brain research
JID - 0043312
SB  - IM
MH  - Differential Threshold
MH  - Discrimination, Psychological/*physiology
MH  - Female
MH  - Humans
MH  - Male
MH  - *Motion
MH  - Motion Perception/*physiology
MH  - Movement/*physiology
MH  - Photic Stimulation
MH  - Posture
MH  - Time Perception/*physiology
MH  - Young Adult
EDAT- 2013/04/17 06:00
MHDA- 2013/12/16 06:00
CRDT- 2013/04/17 06:00
PHST- 2013/01/24 00:00 [received]
PHST- 2013/03/25 00:00 [accepted]
PHST- 2013/04/17 06:00 [entrez]
PHST- 2013/04/17 06:00 [pubmed]
PHST- 2013/12/16 06:00 [medline]
AID - 10.1007/s00221-013-3502-8 [doi]
PST - ppublish
SO  - Exp Brain Res. 2013 Jun;227(2):223-9. doi: 10.1007/s00221-013-3502-8. Epub 2013 
      Apr 16.