Abstract
When
two
targets
(T1
&
T2)
are
presented
in
rapid
succession,
observers
often
fail
to
report
T2
if
they
attend
to
T1.
Bottleneck
theories
propose
that
this
attentional
blink
(AB)
is
due
to
T1
occupying
a
slow
processing
stage
when
T2
is
presented.
Accordingly,
if
increasing
T1
difficulty
increases
T1
processing
time,
this
should
cause
a
greater
AB.
Attention
capture
hypotheses
suggest
that
T1
captures
attention,
which
cannot
be
reallocated
to
T2
in
time.
Accordingly,
if
increasing
T1
difficulty,
decreases
saliency,
this
should
cause
a
smaller
AB.
Studies
examining
how
T1
difficulty
affects
the
AB
have
reported
inconsistent
results.
For
example,
some
found
a
negative
correlation
between
T1
contrast
and
T2
performance
(Chua,
2005)
where
others
find
a
positive
correlation
(Christmann
&
Leuthold,
2004).
Here,
we
use
additive
Gaussian
noise
to
tease
apart
the
exogenous
capture
effect
from
the
effect
of
T1
contrast.
The
capture
effect
is
varied
by
the
overall
contrast
energy
for
signal
and
noise.
In
two
T1
conditions
we
adjust
T1
performance
to
60%
by
signal
to
noise
ratio
(SNR)
but
vary
T1
contrast
energy
between
conditions.
From
17
observers
we
find
that
T2
performance
correlates
negatively
with
T1
contrast
energy.
Our
results
indicate
that
T1
capture
modulates
the
AB.
We
suggest
that
this
effect
has
confounded
previous
studies
on
the
effect
of
T1
difficulty.
In
an
electrophysiological
version
of
the
study
we
will
further
examine
the
implied
relation
between
attention
capture
and
the
AB.
Original language | English |
---|---|
Title of host publication | Proceedings of the Cognitive Neurosciences Society's Annual meeting 2011 |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | 18th Cognitive Neurosciences Society's Annual meeting - San Francisco, CA, United States Duration: 2 Apr 2011 → 5 Apr 2011 Conference number: 2011 http://neurocritic.blogspot.dk/2011/04/cognitive-neuroscience-society-annual.html |
Conference
Conference | 18th Cognitive Neurosciences Society's Annual meeting |
---|---|
Number | 2011 |
Country | United States |
City | San Francisco, CA |
Period | 02/04/2011 → 05/04/2011 |
Internet address |