Preaspiration in the Nordic Languages: Synchronic and Diachronic ...

very large, since postaspiration was approximately only 7–9 ms shorter
on average in till type (i.e., function) words than in tennis type (i.e.,
content) words.
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60
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GT CK MP FS
Figure 4–4. The range of postaspiration durations for word-initial fortis stops
for the four CSw subjects. 1
The mean postaspiration duration of initial stops in taverna type
words was slightly shorter than in tennis type words for 3 of the 4
subjects, but t-tests do not indicate that the differences are significant.
The difference was even smaller than that observed between the tennis
type and the till type words (i.e., content vs. function words). It should be
noted that there are far fewer tokens for the taverna type words than for
the other categories, which affects the significance in the t-tests.
There were also differences in mean postaspiration duration between
subjects. For tennis type words, subject FS had the highest mean, 58 ms.
GT and MP had similar mean durations, 46 and 44 ms respectively. CK
1 The notched box shows the median (central line) and the lower and upper quartiles
(lower and upper box boundaries). The box thus comprises 50% of the observed data.
The notched area shows the confidence interval around the median. The dotted-line
(i.e. whisker) connects the nearest observations within 1.5 IQRs (inter-quartile ranges)
of the lower and upper quartiles. The vertical line to the left of the box shows the 90%
percentile range. The diamond in that line shows the mean and the 95% confidence
interval around the mean. Crosses (+) and circles () indicate outliers, observations
more than 1.5 IQRs (near outliers) and 3.0 IQRs (far outliers) from the quartiles.
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