最終更新日：2022/12/24
The participants certainly differ in how their practice is distributed (1, 2, or 3 days), but they also differ in how much total practice they get (3, 6, or 9 hours). This is a perfect example of a confound—it is impossible to tell if the results are due to one factor (distribution of practice) or the other (total practice hours); the two factors covary perfectly.
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元となった例文
The
participants
certainly
differ
in
how
their
practice
is
distributed
(1,
2,
or
3
days),
but
they
also
differ
in
how
much
total
practice
they
get
(3,
6,
or
9
hours).
This
is
a
perfect
example
of
a
confound—it
is
impossible
to
tell
if
the
results
are
due
to
one
factor
(distribution
of
practice)
or
the
other
(total
practice
hours);
the
two
factors
covary
perfectly.
