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Identifying preschool measures most predictive of language outcomes at 11 years in the Early Language in Victoria Study ...
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A Classification Analysis of the High and Low Levels of Global Competence of Secondary Students: Insights from 25 Countries/Regions
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In: Sustainability ; Volume 13 ; Issue 19 (2021)
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On the Efficiency of German Growth Forecasts: An Empirical Analysis Using Quantile Random Forests ...
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On the Efficiency of German Growth Forecasts: An Empirical Analysis Using Quantile Random Forests
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Growing Random Forests reveals that exposure and proficiency best account for 2 individual variability in L2 (and L1) brain potentials for syntax and semantics
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On the efficiency of German growth forecasts: An empirical analysis using quantile random forests
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Verbing and nouning in French : toward an ecologically valid approach to sentence processing
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Automatic Selection of Parallel Data for Machine Translation
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In: IFIP Advances in Information and Communication Technology ; 14th IFIP International Conference on Artificial Intelligence Applications and Innovations (AIAI) ; https://hal.inria.fr/hal-01821299 ; 14th IFIP International Conference on Artificial Intelligence Applications and Innovations (AIAI), May 2018, Rhodes, Greece. pp.146-156, ⟨10.1007/978-3-319-92016-0_14⟩ (2018)
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Furosine and HMF determination in prebiotic-supplemented infant formula from Spanish market
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Modelling the interplay of multiple cues in prosodic focus marking
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In: Laboratory Phonology: Journal of the Association for Laboratory Phonology; Vol 8, No 1 (2017); 4 ; 1868-6354 (2017)
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Predictive modeling of human placement decisions in an English Writing Placement Test
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In: Graduate Theses and Dissertations (2016)
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To HAVE and to BE: Function Word Reduction in Child Speech, Child Directed Speech and Inter-adult Speech
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Modelling phonetic reduction in a corpus of spoken English using Random Forests and Mixed-Effects Regression
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Dilts, Philip C. - : University of Alberta. Department of Linguistics., 2013
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Modelling phonetic reduction in a corpus of spoken English using Random Forests and Mixed-Effects Regression
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Dilts, Philip C. - : University of Alberta. Department of Linguistics., 2013
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Abstract:
Degree: Doctor of Philosophy ; Abstract: In this thesis, phonetic reduction in the Buckeye Corpus (Pitt et al. 2005) of conversational speech is modelled using advanced statistical techniques. Two measures of phonetic reduction are modelled, reduction in the duration of words and deletion of segments from words. Statistical modelling techniques are used to predict how much of each type of reduction is observed in the corpus. Predictor variables are selected from a number of broad classes, including demographic, phonetic, predictability, syntactic, semantic, and pragmatic variables. The broad scope of these variables leads to a generalizable picture of the factors leading to reduction in spontaneous speech. Two modelling techniques with complementary properties are applied to the modelling task: Random Forest (RF) models (Breiman 2001), and Linear Mixed-Effect Regression (LMER) Models. RF models can be used to model complex interactions and highly co-linear predictor variables much more easily than LMER models can. Conversely, LMER models allow each word form and speaker to differ in their response to reduction-predicting variables. LMER models can also easily incorporate predictor variables composed of a large number of unordered categories. Both of these properties of LMER models are effectively impossible to incorporate into current RF models on the scale required for the present study. Results relating to the variables or combinations of variables that correlate with reduction or improve model prediction are described. Possible explanations for the results and implications for the nature of the processes underlying reduction during spontaneous speech are explored. Results relating to the modelling process are also discussed. In particular, random forest modelling indicated that several potential interactions between variables were overlooked in initial LMER modelling. When these interactions were included in a second round of LMER modelling, several were found to improve prediction significantly. The results of the present study may lead to improvements in speech recognition and speech production technologies. The results also suggest that random forests can be used to improve regression models of language data.
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Keyword:
Linguistics; Mixed-Effects Regression; Phonetic Reduction; Phonetics; Random Forests
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URL: http://hdl.handle.net/10402/era.34065 https://era.library.ualberta.ca/items/ff36bb82-fe70-4a83-b244-96babc2a36bc https://doi.org/10.7939/R3KH0F719
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A random forest system combination approach for error detection in digital dictionaries
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A Hybrid approach for biomedical relation extraction using finite state automata and random forest-weighted fusion
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