It is an example of the positive effects of what scientists call "disfluency".    From Wordnik.com.  [BBC News - Home] Reference

To me, native speaker equivalence means that, apart from disfluency, you only make "native speaker mistakes.".    From Wordnik.com.  [languagehat.com: NATIVE SPEAKER.] Reference

We'd found that disfluency led people to think harder about things.    From Wordnik.com.  [BBC News - Home] Reference

 A Word About Fluency -  We all go through a stage of disfluency.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Keeping with the theme of the research, they titled their paper, "Fortune favors the bold and the italicized: Effects of disfluency on educational outcomes.".    From Wordnik.com.  [Yahoo! News: Business - Opinion] Reference

disfluency, can actually help young children learn language.    From Wordnik.com.  [NPR Topics: News] Reference

I documented lots of Kevin Madden's goofs, gaffs, pratfalls, moments of disfluency, attempts to botch even the simplest of messages, and naive and transparent lies on my "who is Willard Milton Romney" blog. ".    From Wordnik.com.  [race42008.com] Reference