Learning
should
be
adjusted
according
to
the
surprise
associated
with
observed
outcomes
but
calibrated
statistical
context.
For
example,
when
occasional
changepoints
are
expected,
surprising
weighted
heavily
speed
learning.
In
contrast,
uninformative
outliers
expected
occur
occasionally,
less
influential.
Here
we
dissociate
from
degree
which
they
demand
learning
using
a
predictive
inference
task
and
computational
modeling.
We
show
that
P300,
stimulus-locked
electrophysiological
response
previously
adjustments
in
behavior,
does
so
conditionally
on
source
of
surprise.
Larger
P300
signals
predicted
greater
changing
context,
context
where
was
indicative
one-off
outlier
(oddball).
Our
results
suggest
provides
signal
is
interpreted
by
downstream
processes
differentially
order
appropriately
calibrate
across
complex
environments.
Fluctuations
in
arousal,
controlled
by
subcortical
neuromodulatory
systems,
continuously
shape
cortical
state,
with
profound
consequences
for
information
processing.
Yet,
how
arousal
signals
influence
population
activity
detail
has
so
far
only
been
characterized
a
few
selected
brain
regions.
Traditional
accounts
conceptualize
as
homogeneous
modulator
of
neural
across
the
cerebral
cortex.
Recent
insights,
however,
point
to
higher
specificity
effects
on
different
components
and
Here,
we
provide
comprehensive
account
relationships
between
fluctuations
neuronal
human
brain.
Exploiting
established
link
pupil
size
central
performed
concurrent
magnetoencephalographic
(MEG)
pupillographic
recordings
large
number
participants,
pooled
three
laboratories.
We
found
cascade
relative
peak
timing
spontaneous
dilations:
Decreases
low-frequency
(2–8
Hz)
temporal
lateral
frontal
cortex,
followed
increased
high-frequency
(>64
mid-frontal
regions,
monotonic
inverted
U
intermediate
frequency-range
(8–32
occipito-parietal
Pupil-linked
also
coincided
widespread
changes
structure
aperiodic
component
activity,
indicative
excitation-inhibition
balance
underlying
microcircuits.
Our
results
novel
basis
studying
modulation
cognitive
computations
circuits.
Neuron,
Год журнала:
2024,
Номер
112(20), С. 3381 - 3395
Опубликована: Июнь 25, 2024
Pupil
size
is
a
widely
used
metric
of
brain
state.
It
one
the
few
signals
originating
from
that
can
be
readily
monitored
with
low-cost
devices
in
basic
science,
clinical,
and
home
settings.
is,
therefore,
important
to
investigate
generate
well-defined
theories
related
specific
interpretations
this
metric.
What
exactly
does
it
tell
us
about
brain?
Pupils
constrict
response
light
dilate
during
darkness,
but
also
controls
pupil
irrespective
luminosity.
fluctuations
resulting
ongoing
"brain
states"
are
as
arousal,
what
pupil-linked
arousal
how
should
interpreted
neural,
cognitive,
computational
terms?
Here,
we
discuss
some
recent
findings
these
issues.
We
identify
open
questions
propose
answer
them
through
combination
tasks,
neurocomputational
models,
neurophysiological
probing
interconnected
loops
causes
consequences
size.
Journal of Neuroscience,
Год журнала:
2018,
Номер
38(10), С. 2418 - 2429
Опубликована: Янв. 25, 2018
Perceptual
decision-making
is
biased
by
previous
events,
including
the
history
of
preceding
choices:
observers
tend
to
repeat
(or
alternate)
their
judgments
sensory
environment
more
often
than
expected
chance.
Computational
models
postulate
that
these
so-called
choice
biases
result
from
accumulation
internal
decision
signals
across
trials.
Here,
we
provide
psychophysical
evidence
for
such
a
mechanism
and
its
adaptive
utility.
Male
female
human
performed
different
variants
challenging
visual
motion
discrimination
task
near
threshold.
In
first
experiment,
decoupled
categorical
perceptual
choices
motor
responses
on
trial-by-trial
basis.
Choice
bias
was
explained
choices,
not
responses,
highlighting
importance
in
action-independent
formats.
second
stimulus
environments
containing
levels
autocorrelation
providing
no
external
feedback
about
correctness.
Despite
performing
under
overall
high
uncertainty,
adjusted
both
strength
sign
environments.
When
sequences
were
dominated
either
repetitions
or
alternations,
individual
degree
this
adjustment
as
good
predictor
performance
sensitivity.
The
scaled
with
two
proxies
observers'
confidence
(accuracy
reaction
time).
Together,
our
results
are
consistent
idea
action-independent,
confidence-modulated
variables
accumulated
flexible
manner
depends
decision-makers'
model
environment.
SIGNIFICANCE
STATEMENT
Decisions
based
input
influenced
one's
manifesting
systematically
choices.
We
here
support
arise
context-dependent
quantity
referred
variable:
variable's
dictates
magnitude
show
an
format
manner,
weighted
This
confidence-weighted
enables
decision-makers
flexibly
adjust
behavior
can
be
important
optimizing
sensitivity
momentary
input.
Current Biology,
Год журнала:
2018,
Номер
28(19), С. 3128 - 3135.e8
Опубликована: Сен. 13, 2018
People's
assessments
of
the
state
world
often
deviate
systematically
from
information
available
to
them
[1Tversky
A.
Kahneman
D.
Judgment
under
Uncertainty:
Heuristics
and
Biases.Science.
1974;
185:
1124-1131Crossref
PubMed
Scopus
(19190)
Google
Scholar].
Such
biases
can
originate
people's
own
decisions:
committing
a
categorical
proposition,
or
course
action,
subsequent
judgment
decision-making.
This
phenomenon,
called
confirmation
bias
[2Nickerson
R.S.
Confirmation
bias:
A
ubiquitous
phenomenon
in
many
guises.Rev.
Gen.
Psychol.
1998;
2:
175-220Crossref
(3702)
Scholar],
has
been
explained
as
suppression
post-decisional
dissonance
[3Festinger
L.
theory
cognitive
dissonance.
Stanford
University
Press,
Stanford1957Crossref
Scholar,
4Brehm
J.W.
Postdecision
changes
desirability
alternatives.J.
Abnorm.
1956;
52:
384-389Crossref
(704)
Here,
we
provide
insights
into
underlying
mechanism.
It
is
commonly
held
that
decisions
result
accumulation
samples
evidence
informing
about
[5Gold
J.I.
Shadlen
M.N.
The
neural
basis
decision
making.Annu.
Rev.
Neurosci.
2007;
30:
535-574Crossref
(2264)
6Bogacz
R.
Brown
E.
Moehlis
J.
Holmes
P.
Cohen
J.D.
physics
optimal
making:
formal
analysis
models
performance
two-alternative
forced-choice
tasks.Psychol.
2006;
113:
700-765Crossref
(1146)
7Liu
F.
Wang
X.-J.
common
cortical
circuit
mechanism
for
perceptual
discrimination
veridical
judgment.PLoS
Comput.
Biol.
2008;
4:
e1000253Crossref
(23)
8Wang
Decision
making
recurrent
neuronal
circuits.Neuron.
60:
215-234Abstract
Full
Text
PDF
(424)
We
hypothesized
choices
process
by
selectively
altering
weighting
(gain)
evidence,
akin
selective
attention.
developed
novel
psychophysical
task
test
this
idea.
Participants
viewed
two
successive
random
dot
motion
stimuli
made
motion-direction
judgments:
after
first
stimulus
continuous
estimation
overall
direction
across
both
second
stimulus.
Participants'
sensitivity
was
enhanced
when
consistent
with
initial
choice
(compared
both,
choice-inconsistent
stimuli).
model
entailing
choice-dependent
gain
modulation
effect
better
than
several
alternative
mechanisms.
Choice-dependent
also
established
another
averaging
numerical
values
instead
directions.
conclude
intermittent
direct
attention
during
evaluation
possibly
due
decision-related
feedback
brain
[9Wimmer
K.
Compte
Roxin
Peixoto
Renart
de
la
Rocha
Sensory
integration
dynamics
hierarchical
network
explains
probabilities
area
MT.Nat.
Commun.
2015;
6:
6177Crossref
(88)
Our
results
point
interplay
between
decision-making
PeerJ,
Год журнала:
2019,
Номер
7, С. e7086 - e7086
Опубликована: Июль 9, 2019
Eye-tracking
experiments
rely
heavily
on
good
data
quality
of
eye-trackers.
Unfortunately,
it
is
often
the
case
that
only
spatial
accuracy
and
precision
values
are
available
from
manufacturers.
These
two
alone
not
sufficient
to
serve
as
a
benchmark
for
an
eye-tracker:
deteriorates
during
experimental
session
due
head
movements,
changing
illumination
or
calibration
decay.
Additionally,
different
paradigms
require
analysis
types
eye
movements;
instance,
smooth
pursuit
blinks
microsaccades,
which
themselves
cannot
readily
be
evaluated
by
using
alone.
To
obtain
more
comprehensive
description
properties,
we
developed
extensive
eye-tracking
test
battery.
In
10
tasks,
related
measures
such
as:
decay
accuracy,
fixation
durations,
pupil
dilation,
movement,
microsaccade
classification,
blink
influence
motion.
For
some
measures,
true
theoretical
exist.
others,
relative
comparison
reference
eye-tracker
needed.
Therefore,
collected
our
gaze
simultaneously
remote
EyeLink
1000
compared
with
mobile
Pupil
Labs
glasses.
As
expected,
average
0.57°
was
better
than
0.82°
glasses
(N
=
15).
Furthermore,
classified
less
fixations
shorter
saccade
durations
Similarly,
found
fewer
microsaccades
The
over
time
decayed
slightly
1000,
but
strongly
Finally,
observed
measured
diameters
differed
between
eye-trackers
individual
subject
level
group
level.
conclude,
battery
offers
tasks
allow
us
many
parameters
interest
in
stereotypical
situations
addresses
common
source
confounds
measurement
errors
(e.g.,
yaw
roll
movements).
All
recorded
(including
Labs'
videos),
stimulus
code
battery,
modular
pipeline
freely
(https://github.com/behinger/etcomp).