Number of Words and Stems that Differ

"The number of words and stems that differ— Stemmers often leave words unchanged. For example, a stemmer might not alter "engineer" because it is already a root word. Stronger stemmers will change words more often than weaker stemmers." Frakes & Fox [Ref: W1].


If the Levenshtein Distance setting is 0 to 0, the words listed will be where the words in List A and List B are identical, conversely with a setting of 1 to 32 it will list all words that differ in List A and List B. The setting will affect the metric displayed for List A and B Mean Word Length, and Mean Characters Removed.