Does Spell-Checking Software Need a Warning Label? In this article presents information on the importance of spell-checking software. In terms of overall performance, both their level of expertise and the presence of the software that checked spelling and grammar affected users. High verbals performed better than low verbals. For the most obvious errors properly discovered by the software, user performance was higher with the language-checking software turned on. However, considering false positives and false negatives--both common situations when editing a document--performance was worse for both high and low verbals with the software turned on. When the language-checking software identifies errors correctly, leaving it on helps both high and low verbals eliminate errors. In this case, when the software is with journal_articlesspell_checkingtext_checking