«Timpe’s book presents a thoroughly empirical attempt to measure discourse-related constructs, the very nature of which make them more difficult to manipulate than, for example, form-related ones, such as those of a grammatical, morphological or phonological nature. [...] This is a thought-provoking book, which addresses profound questions concerning the relationship between knowledge, identity, learning and membership.» (Jose I. A. Rio, Linguist List, April 2015)