Pronunciation ˌhaɪpərˌædəpˈteɪʃn

A phenomenon which may occur when speakers try to imitate or change to an accent other than their native one and which consists of applying a change to a wider set of forms than is necessary. For example, a speaker of a northern accent of English imitating a southern accent may correctly make the change æɑ: in words such as path, pass, ask, but may also apply this change to words such as gas, mass, giving a pronunciation which is incorrect in the target accent.

Also called hypercorrection.