A Lexical Transducer (LT) as defined by Karttunen, Kaplan, Zaenen
1992 is a
specialized finite state transducer (FST) that relates citation forms of
words and
their morphological categories to inflected surface forms. Using LTs is
advantageous
because the same structure and algorithms can be used for morphological
analysis
(stemming) and generation. Morphological processing (analysis and generation)
is
computationally faster, and the data for the process can be compacted more
tightly
than with other methods. The standard way to construct an LT consists of
three
steps: (1) constructing a simple finite state source lexicon
LA which defines all valid
canonical citation forms of the language; (2) describing morphological
alternations
by means of two-level rules, compiling the rules to FSTs, and intersecting
them to
form a single rule transducer RT; and (3) composing LA and RT.
We have already proposed a standard portrait for the assessment of preferable skin tone 1 . The present report describes a psychophysical experimental method, i.e., simultaneous triplet comparison that has been developed for the assessment of skin tone by using the portrait and that is characterized not only by a scalability, stability and reproducibility of the resulting scale values, but also by a reduced stress on observers. We have confirmed that the present simultaneous triplet comparison has a degree of scalability and stability almost equivalent to that of paired comparison that is most widely used for similar purposes, and that the stress on observers (expressed in terms of assessment time) is about half as much as that of paired comparison.
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