103_21_full

Thenibblingresponsefwasnotitselfimitatve

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Unformatted text preview: he
same
few
males
as
mates
 Humans
 •  Mate
preferences
among
North
American
college
students
in
1939,
 1956,
1967,
1977,
1985,
and
1996:
regional
as
well
as
temporal
 variaTons
 –  e.g.,
Students
in
Texas
were
more
interested
in
chasTty,
religious
 background,
and
neatness
than
were
students
in
Michigan
 –  Over
Tme,
the
value
placed
on
chasTty
by
both
sexes
dropped,
and
the
 value
placed
on
mutual
a@racTon
and
love
increased
(Buss
et
al.
2001)
 Fear
of
predators
 Adult
free‐ranging
monkeys
show
robust
fear

 response:
fleeing,
fearful
expressions,
alarm
calls,
etc.
 Laboratory
monkeys
show
no
such
response;
fear
is
 not
innate
but
acquired
(to
an
extent)
 Acquired
fear
of
snakes
in
monkeys
is
a
Pavlovian
condiToned
response
 
 
CS
=
sight
of
snake
 
 
US
=
another
monkey
displaying
fear
of
snake
 •  ObservaTonal
condiToning:
an
increase
in
the
likelihood
of
a
sTmulus
 eliciTng
a
response,
based
on
the
subject’s
uncondiToned
reacTon
to
the
 response
of
another
animal
to
the
sam...
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