Simon Thomas answers the question “What causes ESL students to make speaking and writing errors? “ quite comprehensively in a recent blog post at efl-resource.com.
He looks at the differences between “mistakes” (lack of knowledge or understanding) and “slips” (performance errors) – which I think is a distinction originally made by Pit Corder in his 1981 book “Error Analysis and Interlanguage“. Simon goes on to look at possible causes and possible solutions to learner errors.
Since I started typing this – Simon’s just published a further three posts extending and developing the topic (though I haven’t had a chance to read them all yet!):
- Giving immediate correction to ESL students’ spoken errors
- Giving delayed correction in the ESL classroom
- Correcting written work in the ESL classroom



Wonderful collection of resources, and an interesting subject indeed. Cheers, Brad
Thanks Brad!
one of those where other people did all the hard work!
David
When I think about mistakes versus errors, I think of Chomsky’s distinction between competence and performance. Although there may be a pedagogical advantage of distinguishing the two (if it’s even possible), it still is all about the performance.