1
.
A
method
of
research
known
as
____________________
____________________
allows
psychologists
to
study
behavior
as
it
occurs
in
real
-
life
settings
.
2
.
Psychologists
use
____________________
research
to
examine
relationships
between
two
or
more
variables
without
manipulating
any
variable
.
3
.
The
method
of
research
best
suited
to
explaining
behavior
is
____________________
research
.
4
.
The
____________________
variable
in
an
experiment
is
manipulated
to
see
how
it
affects
a
second
variable
;
the
____________________
variable
is
the
one
observed
for
any
possible
effects
.
5
.
To
ensure
that
the
results
of
a
particular
study
apply
to
a
larger
population
,
researchers
use
____________________
or
____________________
samples
.
