[...] affix shifts, in which a regular inflection erroneously appears on a word earlier or later in the sentence as in "tell-us-ing" for "telling us", are common, whereas shifts involving nonmorphemic material at the ends of words are rare [Garrett, M., 1980, Levels of processing in sentence production, in Butterworth, B., ed., “Language production: Vol. I. Speech and talk”, London, Academic Press, pp. 177-220; Stemberger, J. P., 1985b, An interactive avtivation model of language production, in Ellis, A., ed., “Progress in the psychology of language”, London, Erlbaum, vol. 1, pp. 143-186].
- Stemberger & MacWhinney (2004a), a pag.89