Before revision: Methods used include collecting word lists (Bender 1971), playing recorded texts to assess comprehension (Casad 1974 ), sentence repetition tests (Radloff 1991), questionnaires (Hochstetler and Tillinghast 1996), group and individual interviews, retelling of stories (McKinnies and Priestly 2004), direct observation (Cooper and Carpenter 1976), and even internet surveys (tafesilafai.org).
After revision: , Yoder 2017pointing to pictures after listening to instructions (GooskensSchneider 2016),Methods used include collecting word lists (Bender 1971), playing recorded texts to assess comprehension (Casad 1974 ), sentence repetition tests (Radloff 1991), questionnaires (Hochstetler and Tillinghast 1996), group and individual interviews, retelling of stories (McKinnies and Priestly 2004), direct observation (Cooper and Carpenter 1976), and even internet surveys (tafesilafai.org).