rp3 - 9/15/10
 Viola,on
of
Expecta,on
Paradigms
...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 9/15/10
 Viola,on
of
Expecta,on
Paradigms
 •  Preferen,al
Looking
Paradigms
 •  Habitua,on
 Cogni,on‐Ac,on
Tradeoff
 •  Increased
motor
demands,
decreased
 cogni,ve
performance
 •  Increased
cogni,ve
demands
for
planning
and
 execu,ng
a
reach
lead
to
slower
motoric
 responding
 Motoric
Manipula,on
 1
 9/15/10
 Cogni,ve
Manipula,on
 Learning
about
object
proper,es
 •  Reaching
and
grasping
 Grasping
Pictures
 2
 9/15/10
 Grasping
Pictures
 Grasping
TV
images
 Grasping
Pictures
 •  Do
9‐months
think
the
picture
is
a
real
object?

 Is
that
why
they
are
grasping
for
it?
 3
 9/15/10
 Grasping
Pictures
 Detour
Reaching/
Object
Retrieval
Task
 Controlling
for
weight
when
grasping
 an
object
 •  6‐
to
8‐month
olds:
applica,on
of
force
in
 reach
and
grasp
unrelated
to
weight
of
object
 •  9‐months:
adjusts
arm
and
hand
tension
to
 object’s
weight
aYer
grasping
the
object
 •  12‐months:
adjusts
arm
and
hand
tension
 upon
repeatedly
receiving
the
same
object
 •  18‐months:
Develops
rule
that
“similar”
 objects
should
weigh
the
same
 4
 9/15/10
 Bimanual
Reaching
 •  4
to
5‐months:

can
only
deal
with
one
toy
at
a
 ,me
 •  6
to
8‐months:
infants
store
a
toy
in
one
hand
 to
fee
the
receiving
hand
for
the
second
toy
 Bimanual
Reaching
 •  Needing
both
hands
to
accomplish
a
task
 Hand
Preferences
 •  Do
manual
asymmetries
present
in
young
 infants
provide
any
clue
to
later
hand
 preferences?
 •  Hand
preference
remains
stable
at
around
3‐ to
4‐years
of
age


 5
 9/15/10
 Hand
Preferences
 •  Conflic,ng
results!
 •  Early
hand
asymmetries
as
task
dependent
 –  Right
hand

directed
target‐related
ac,vi,es
 –  LeY
hand

non‐directed
ac,vi,es
 Determining
Handedness
 •  Spontaneous
arm
movements
 –  Not
suscep,ble
to
the
task
demands
required
of
 inten,onal
movements
 –  Right
arm
appears
to
be
more
developed
than
the
 leY
 •  Spoon‐use
(17
to
23‐months)
showed
 preference
for
which
hand
they
used
for
the
 spoon
 Fine
Motor
Development
 •  Movements
produced
by
the
small
muscle
 groups
 •  Most
research
into
fine
motor
skills
related
to
 manipula,on
 6
 9/15/10
 Basic
Grasps
in
Infancy
 •  Palmer
grasp
 –  Emerges
around
4‐
to
5‐months
 –  Involves
the
whole
hand
or
palm
 –  Larger
objects
 Basic
Grasps
in
Infancy
 •  Pincer
grasp
 –  Emerges
around
9‐
to
10‐months
 –  Thumb
and
index
finger
 –  Really
small
objects
 Holding
a
wri,ng
implement
 •  3
stages
 7
 9/15/10
 Holding
a
wri,ng
implement
 •  Stage
1:
Supinate
Grasp

 Holding
a
wri,ng
implement
 •  Stage
2:
Pronate
Grasp
 Holding
a
wri,ng
implement
 •  Stage
3:
 –  Sta,c
Tripod
(around
4‐years
of
age)
 –  Dynamic
tripod
(by
6‐to
7‐years
of
age)
 8
 9/15/10
 Holding
a
wri,ng
implement
 •  Proximodistal
rule
of
motor
development
 Stages
of
Handwri,ng
 Problems
with
Fine
Motor
Skills
in
 special
popula,ons
 9
 ...
View Full Document

This note was uploaded on 02/17/2011 for the course HK 453 taught by Professor Claxton during the Fall '10 term at Purdue.

Ask a homework question - tutors are online