"Contrastive analysis is a method for separating expressive speech-language patterns that are consistent with a client’s first dialect or language (D1/L1) from patterns that represent true errors" (McGregor, et al., 1997).
The Use of Contrastive Analysis in Distinguishing Difference From Disorder: A Tutorial
(Pham, 2019)
About World Languages (MustGo.Com)
Multilingual Speech Assessments
(McLeod, 2012)
(Mercier, n.d.)