seeing slow and seeing fast. problems with timeline metaphor of perceptual experience
DESCRIPTION
Draft of talk at the AAHPSSS conference 2014 http://aahpsss.org/conference/2014-conference/TRANSCRIPT
[email protected] of Psychology
@ceptional
Seeing Slow and Seeing Fast
http://www.slideshare.net/holcombea/
Adapted from: Tse, P. U., Intriligator, J., Rivest, J., & Cavanagh, P. (2004). Attention and the subjective expansion of time. Perception & Psychophysics, 66(7), 1171–1189.
53 x 8
?
Cognition
Perception
Holcombe, Kanwisher, & Treisman (2001)
When many impressions follow in excessively rapid succession in time, although we may be distinctly aware that they occupy some
duration, and are not simultaneous, we may be quite at a loss to tell which comes first and which last
!-William James (1890)
single-shot cycling
Subjective timeV P R S V P R S V P
?
On a timeline, one event succeeds another. !
But that succession order may not be available / reportable.
Succession order not always available/reportable, so there are seemingly seamless transitions in experience but we can’t report what they are transitioning between. !
RESPONSE Fine, but consciousness at any one time is unified. !
E.g. when we perceive an object, and experience its color, and its motion, we should experience it as having a particular color and motion.
unified visual experience of motion and color
RESPONSE Fine, but consciousness at any one time is unified. !
E.g. when we perceive an object, and experience its color, and its motion, we should experience it as having a particular color and motion.
unified visual experience of motion and color
NO?Any two qualities should be experienced as simultaneous or not-simultaneous. !
Simultaneity experience unknown?
http://www.psych.usyd.edu.au/staff/alexh/research/colorMotionSimple/
Unified visual experience
Separate timelines?
color
motion
OR
Also: see auditory streaming
0amountof light
sensoryfilter
0
0lumsignal
centralfilter
NO SIGNAL
Stages of the system
flicker perceptionfirst-order motion perception
500 250 125 63 32 16duration of half cycle (ms)
1 2 4 8 16 32alternation rate, hertz (cycles per second)
form-color separated
& other arbitrary ♪ ♪
motion-color
500 250 125 63 32 16duration of half cycle (ms)
1 2 4 8 16 32alternation rate, hertz (cycles per second)
form-color separated
motion-colormotion-motion T
global form-colorhigher order motion
word recognitionacceleration, direction change
jump pink
instantaneous positionselection from R S V P
& other arbitrary ♪ ♪
flicker perceptionfirst-order motion perception
depth from binocular disparity
local elements ➞ global form
edges and texture boundaries
binding motion-motion non-T
color-orientation, common location
L eye: R eye:
1 targetobject tracking 2 targets
3 targets
Local analysis V1,V2
Non-local analysis V4, LOC
words
sele
ctio
n,
trac
king
Visual cognition
Massively parallel
Very low capacity
Movie1_threeFlickerPhaseLimits.mov
Above the slow limit
Above the flicker, motion, etc. limit
•Succession of experiences may not yield experience of succession
•Multiple timelines?, even for features of the same object (color and motion)
Holcombe, A.O. (2013). The temporal organisation of perception. In The Oxford Handbook of Perceptual Organisation. Wagemans, J., ed. Holcombe, A.O. (2009). Seeing slow and seeing fast: Two limits on human perception. Trends in Cognitive Science, 13(5), 216-21.
Problems with timeline metaphor
Big brain, big visual system. Multiple timescales
https://vimeo.com/100287188