Saddleback Journal of Biology - Saddleback College

Spring 2010 Biology 3B Paper
rankings done by the female subjects in both sets of
data collection.
percentage and selection percentage of male subjects
in study 1 for long-term relationships.
Subject
#1
Subject
#2
Subject
#3
Subject
#4
Average
Symmetry
Ratio
(%)
Selection
Percentage
(Menstruating)
Selection
Percentage
(Nonmenstruating)
Average
Symmetry
Ratio
(%)
Selection
Percentage
(Menstruating)
97.96 97.18 96.58 96.54
0 0 12.5 12.5
6.6 0 8.8 2.2
Subject
#5
Subject
#6
Subject
#7
Subject
#8
96.00 96.48 98.58 98.97
12.5 0 25 1437.5
Figure 1. Three facial measurements (A 1 , A 2 , A 3 )
represent bilateral facial symmetry.
Results
Ratio averages of the three facial symmetry
measurements of each subject and selection
percentage for the first study are shown in table 1.
The male subjects with the greatest degree of
bilateral facial symmetry was never chosen
significantly more by the menstruating group then by
the non-menstruating group for long-term
relationships. In the first study the menstruating
group selected the individual with the greatest
bilateral facial symmetry for long-term relationship
55% of the time. There is no significant difference in
the amount of times chosen by the menstruating
group compared to the non-menstruating group
(p=0.5711).
Selection
Percentage
(Nonmenstruating)
4.4 11.1 35.5 31.1
Ratio averages of the three facial symmetry
measurements of each subject and selection
percentage for the second study are shown in table 2.
In the second study the menstruating group selected
the individual with the greatest bilateral facial
symmetry for long-term relationship 46% of the time.
There is no significant difference in the amount of
times chosen by the menstruating group compared to
the non-menstruating group (p=0.6711). For shortterm
relationships only one individual (subject #3)
was chosen significantly more often by the
menstruating group (p=0.0005).
Table 1. Average ratio
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Saddleback Journal of Biology
Spring 2010