May 2 ===== Gerken:2008 ----------- p. 175: "One class of hypotheses is based on the observation that infants show a decline in non-native consonant discrimination at roughly the period of development that they begin to recognize and produce first words (e.g., Best, 1995; Jusczyk, 1985; MacKain, 1982; Werker & Pegg, 1992)" First, my intuition tells me that infants should actually show an increase in consonant discrimination, eg. begin to recognize and ignore non-native sounds (because they don't carry meaning like native-sounds do). Am I misinterpreting this? Second, I'm wondering how infant discrimination of sounds was operationalized in the experiments. (in fact, in most of the experiments in the paper, how 'interest' or attention' or ‘discrimination’ or lack thereof in patterns/phonemes/words/etc. is operationalized is not mentioned and I think these methods would provide a great deal of discussion when interpreting results…) p176: "On this view, an English-learning infant might hear a continuum of different degrees of aspiration on word final stops, with most of the values clustering around a particular point in the acoustic distribution. That is, English-learning infants are likely to hear a unimodal distribution of aspiration." How can a sound be aspirated in different degrees or on a continuum? Many studies in the paper show that infants can generalize sound patterns learned during the experiment 'training' phase to unseen test examples. However it seems that these trained patterns use sounds from the infant's native language. It would be interesting to see the results of an experiment in which an infant is trained on sound patterns of a non-native language and see if they perform worse in generalization (I would imagine so). Is there any correlation between infants' sensitivity to different linguistic form and determining if a structure is difficult to comprehend or not? What evidence suggests that infants are sensitive to the word order and syntactic categories even before they completely comprehend the meaning? According to the paper, infants are sensitive to the ordering of word-like units before they become sensitive to the basic categories of phonology. How is it possible for children to know about the context in which certain words appear if they are not even able to segment words phonologically? How can the sensitivity to syntactic form (e.g. word order) be influenced by bilingual L1 acquisition? (Especially if the rules concerning word order differ between the two acquired languages) Authors highlight the ability of child to identify the word order and generalize it. However, I feel that this opinion is generally stated keeping in mind about the languages with fixed word orders. What about the cases where the child's native language has flexible word order? (Because one utterance can be presented in different word orders and the authors also highlight that there is no semantic inference during the period of testing) What are the probable reasons for having earlier vowel inventory sensitivity in infants? How are the tests conducted for the results presented and referred in the paper? Is it plainly the analysis from eye tracking or did some studies use the brain wave? In this paper, it was hinted that cross-linguistic differences existed in language development. This of course relates to difference in each individual language morpho-syntactic and phonological rules. I was wondering, what implications (if any) can the way children, who are learning different languages, handle linguistic structures (e.g., word order, inflectional morphology, phonology...) have for language teaching (2nd language acquisition)? Continuing on my previous question, is there agreement on how do these typological differences influence language acquisition processes - i.e. is there a group of languages for which there is a significantly different sequence of linguisitc structures being learnt by infants/children from that observed for English speaking children (since English is the most investigated and reported language in these studies)? "in some studies discrimination is reflected in greater attention to familiar forms, while in other studies there is greater attention to novel forms." (p. 174)-- Are there individual preferences for familiar or novel forms? How do researchers know that infants are actually able to discriminate between these two forms and that the results are not influenced by any confounding variables? The studies mentioned in the article discuss infants in general, but are there any gender differences in sensitivity to linguistic form?