Flashcards in Multisensory integration - cue combination Deck (50)
tactile info when engaging/touching/manipulating an object =
different senses might provide conflicting information about a sensory stimulus =
sensory conflicts need to be resolved. How?
we need to make a choice to resolve the conflict
does vision or touch dominate judgement of object size?
vision dominates perceived object size
what is it called when visual input dominates to provide a more accurate judgement of object size?
visual capture > this is the VISUAL CAPTURE EFFECT
does touch have any influence on the visual capture effect?
yes but only small but consistent influence
what were the 3 ways Rock and victor assessed visual capture?
pointing, feeling, drawing
is there a strict sensory hierarchy?
no, audition can dominate vision
who conducted a study to show that audition can dominate vision by testing for sensory conflict?
Shams et al, 2000
what were the results from Shams et al, 2000 study?
number of auditory beeps determined the number of reported visual flashes, sound was followed more closely than sight e.g. 1 flash + 2 beeps = 2 beeps reported. SHOWS WE TRUST AUDITION MORE THAN VISUAL SENSE
what is the modality precision hypothesis?
modality with highest precision and lowest uncertainty is chosen depending on the task type
following the modality precision hypothesis > spatial task uses _____, temporal task uses ______
what 3 things is sensory uncertainty due to?
perceptual limits, neural noise, cognitive resource limits
communication between neurons at the synapse doesn't work > leads to uncertainty. this is due to?
different senses have different levels of ______ uncertainty
how did Ernst and Banks (2002) shift ppts attention to different senses?
by manipulating the level of sensory uncertainty
what does MLE stand for?
Maximum Likelihood Estimation
what is a normative model?
optimal solution to how a problem should be solved
what is a normative model based on?
what is a process model?
how a problem is actually solved
what is a process model based on?
how should we solve problem of sensory integration?
pick integration method that minimises sensory uncertainty > maximum likelihood estimator
when making an estimate based on haptic and visual inputs what is the best way to get a maximum likelihood estimation?
combine senses and their uncertainty to get an INTEGRATED SIGNAL with the smallest possible combined uncertainty
a large distribution means high ______ which means high sensory _______ and a lower _______
variance, uncertainty, probability
a ______ distribution means low variance which means ___ sensory uncertainty and a _____ probability
small, low, higher
different senses have different amounts of what?
when there are 2 different sense inputs (visual and haptic) there are 2 distributions produced because of 2 different estimates. why are 2 estimates produced?
because sensory conflict is created
how are 2 probabilities integrated if both estimates have the same amount of variance and uncertainty level?
place the integrated estimate exactly in the middle
does a combined estimate of 2 sense inputs have lower or higher uncertainty?
lower! smaller variance = lower uncertainty > higher probability