monfils 418_variable types

Egsexmaritalstatus

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Unformatted text preview: a
single
value
is
used,
it
is
a
constant
 •  e.g.,
Gender
specific
studies
 •  Using
constants
limits
the
generality
of
findings
 •  Both
variables
and
constants
can
be
part
of
an
 experimental
design.
 More
useful
defini$on
of
a
variable
 •  Opera$onal
defini$on
of
a
variable:

providing
a
 defini$on
of
a
variable
in
terms
of
the
criteria
a
 researcher
uses
to
measure
or
manipulate
it
 •  In
other
words:
opera$onally
defining
a
variable
 should
allow
other
researchers
to
replicate
the
 experiment
 When
we
define
variables,
it’s
important
to
take
 into
account
the
different
scales
of
measurement
 with
which
they
are
associated
 Scales
of
Measurement

   Nominal scales
use
numbers
to
dis$nguish
among
 objects
(i.e.,
categories)
   Ordinal scales
are
used
to
place
objects
in
order
on
a
 con$nuum
   Interval scales
have
equal
intervals
between
objects
   Ra4o scales...
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