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For
amount of recall we assign numerical
values to
the seven categories of recall: 0=0, A=l, I=2, F=4, P=8,
M=16, and W=32. After
making these numerical
translations, the total amount of dream
recall, whether
for a single day, a week or a month,
can be obtained by
adding up the numerical ratings. For example, if on day 1
there was a dream recalled with rating
F, and one with
rating M, then the total dream recall for
that day would
be 4+16=20. If on day 2, there
was a dream recalled
with rating P, the total dream recall
for that day would
be 8. The total dream recall for days 1 and
2 combined
would be 20+8=28.
For vividness of
recall we first deal with
each
qualitative category separately. The
ratings are already
in numerical form, but since
an unequal number of
dreams may be involved for two comparison periods,
it
is necessary to work in terms of averages. Thus
we add
up the vividness ratings for a
particular category over
the time period involved and then divide that total by
the
number of dreams rated. For example, suppose
we are
working with the category of color and
are comparing
the vividness of color retention for dreams
recalled on
day 1 versus day 2. On the first
day, two dreams are
recalled, say with color vividness ratings of 0 and 2. The
average rating would then be 0
+ 2 = 2÷2 dreams +1.
For the second day, one dream was recalled, say
with a
color vividness rating of 2. Here we would
have 2÷l=2.
After the average vividness ratings
are computed for
each of the separate categories
an overall average
vividness rating for that time period can
be obtained by
adding up the individual averages.
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