PPT-Latent Variables, Constructs, and Constructions

Roy Howell Texas Tech University Latent Variables Constructs and Constructions  Premise It takes both conceptual clarity and representational accuracy to advance the process of knowledge accumulation. Harvey Goldstein. Centre for Multilevel Modelling. University of Bristol. The (multilevel) binary . probit. model. . Suppose . that we have a variance components 2-level model for . an . underlying continuous variable written as . Causes. (More Theory than Applied). . Peter Spirtes, Erich . Kummerfeld. , Richard Scheines, Joe Ramsey. 1. An example. Person 1. Stress. Depression. 3. Religious Coping. Task: learn causal model. Naman Agarwal. Michael Nute. May 1, 2013. Latent Variables. Contents. Definition & Example of Latent Variables. EM Algorithm Refresher. Structured SVM with Latent Variables. Learning under semi-supervision or indirect supervision. AND OPERATIONALIZATION July 5, 2011 Amanda Leggett Outline  Understanding CONSTRUCTS  Understanding the importance of OPERATIONAL DEFINITIONS  Understanding VARIABLES CONST Part II: Definition and Properties. Nevin. L. Zhang. Dept. of Computer Science & Engineering. The Hong Kong Univ. of Sci. & Tech.. http://www.cse.ust.hk/~lzhang. AAAI 2014 Tutorial. Part II: Concept . AlgoritHm. Online Recommendations. Motivation. It is now common to get “personal recommendations” when we visit a website.. News articles. Product recommendations. Advertisements. Why ?. Unlike paper newspapers or brick and mortar stores, there is no limit [in terms of space/inventory] what can be shown or sold on a web-site... Latent Variables (. LV) in Comparative Effectiveness (CE) research. . We . emphasize the visual modeling approach of statistical questions about CE of alternative . treatments (or interventions); we . Nevin. L. Zhang. Dept. of Computer Science & Engineering. The Hong Kong Univ. of Sci. & Tech.. http://www.cse.ust.hk/~lzhang. AAAI 2014 Tutorial. HKUST. 2014. HKUST. 1988. Latent Tree Models. Bergen, August 2009. Roy Howell. Texas Tech University. Latent . Variables, Constructs, and . Constructions.  . First, some acknowledgements:. Einar Breivik, whose questions made me change my thinking about the idea of formative measurement (after 20 years of being wrong). John A. Lee, Michel Verleysen. 1. Dimensionality Reduction. By: . sadatnejad. دانشگاه صنعتي اميرکبير. (. پلي تکنيک تهران). Dim. Reduction- . Practical Motivations . 2. Alan Nicewander. Pacific Metrics. Presented at a conference to honor . Dr. Michael W. Browne of the Ohio State University, September 9-10, 2010 . Using the factor analytic version of item response (IRT) models, . Nevin. L. Zhang. Dept. of Computer Science & Engineering. The Hong Kong Univ. of Sci. & Tech.. http://www.cse.ust.hk/~lzhang. AAAI 2014 Tutorial. What can LTA be used for:. Discovery of co-occurrence patterns in binary data. Nevin. L. Zhang. Dept. of Computer Science & Engineering. The Hong Kong Univ. of Sci. & Tech.. http://www.cse.ust.hk/~lzhang. AAAI 2014 Tutorial. Part II: Concept . and Properties. Latent . Tree . Nisheeth. Coin toss example. Say you toss a coin N times. You want to figure out its bias. Bayesian approach. Find the generative model. Each toss ~ Bern(. θ. ). θ. ~ Beta(. α. ,. β. ). Draw the generative model in plate notation.