Unformatted text preview: onotonically related
sions between function of barrier Solving for the weig
are is plotted larger and y
height. A higher barrier ensures on decidence and thus are more accurate thataversions are based of larger weight of evion a natural bans) for h
age. The dashed vertical line is the barrier
units rate maximum on averratio (Green and Swets, 1966). Briefly,
1 versus
Reward are more accurate rate of
= Accuracy/ Response Timeh
dence and thus
associated
Reward rate
Response Time height The dashedwith the line is the barrier
age.
reward. (B) Reward vertical reward rate derate. The
a sensory neuron—in this case, a rate
height associated with the maximum rate of
pends on the decision time plus fixed times
Pr(x,yh1)
reward. (B) Reward plus a “time out” for dein and between trials rate. The reward rate an
kes per second—can be thought of as
pends weight time occurs times
error. on the
maximum reward rate evidence
log
B=A betweendecisionplusofplus fixedwhenan
in decision process is sufficiently out” for
trials
a “time accurate
the and
Pr(x,yh0)
error. A maximum consuming. We suggest
reward rate occurs when
but not overly time
le: for a given set of stimulus conditions
the decision adjusts the barrier height to
that the brain process is sufficiently accurate
but not overly time rate of reward. suggest
achieve the maximumconsuming. We(C) Psytion), it has an expected value but can
that the function using the optimal barrier
chometric brain adjusts the barrier height to
(1
0)
achieve the maximum rate of reward. (C) Psyheight. The probability of a correct response
·
ly from momenttomoment or trialtoischometric function using the optimaldefiniplotted for each motion strength. By barrier
2
(1
height. performance of the 0% response
tion, the The probabilityon a correctcoherent
motion response can take
at
The
best fitting cumulative Weibull,
a plotted for each motion
reasonable approximation to
logistic
eural stimulus is 8). chance (not shown).usingline is aonbarrier height. The time fromwhich is isonset until behavioral onstrength.isBy defininumerous stimulustion, th...
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This note was uploaded on 09/15/2011 for the course COGS 1 taught by Professor Lewis during the Spring '08 term at UCSD.
 Spring '08
 LEWIS

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