Constanza Mardones-Segovia

University of Georgia | UGA · Department of Educational Psychology

Latent Dirichlet Allocation (LDA) is a probabilistic topic model that has been used as a tool to detect the latent thematic structure in a body of text. In the context of classroom testing, LDA has been used to detect the latent themes in examinees’ responses to constructed-response (CR) items. There is a growing body of evidence that latent themes...

Latent Dirichlet Allocation (LDA; Blei et al., J Mach Learn Res 3:993–1022, 2003) is a probabilistic topic model that has been used to detect the latent structure of examinees’ responses to constructed-response (CR) items. In general, LDA parameters are estimated using Gibbs sampling or variational expectation maximization (VEM). Relatively little...

This study investigates the applicability of topic modeling to analyze educational data. Topic modeling is useful because it reveals the latent topic structure underlying a collection of texts. Because metadata provides useful information about the topics, this study explores a way of including metadata as a covariate predicting topics and outcomes...

Latent Dirichlet Allocation (LDA) is a probabilistic model to analyze textual data. It was originally developed for corpora containing large amount of textual data, such as large sets of journal abstracts, blogs, and newspaper articles. Recently, LDA has been applied in psychological and educational measurement fields to analyze examinees’ response...

A review of various priors used in Bayesian estimation under the two-parameter logistic model is presented together with clear mathematical definitions of the prior distributions. Examples that compared Bayesian estimation methods are presented using empirical data. The effects of the priors and their specifications on both item and ability paramet...

Resumen: El objetivo de la presente investigación consistió en describir y analizar los significados que estudiantes, ayudantes y profesores asignan a la figura del ayudante universitario. La muestra estuvo compuesta por 43 participantes de una universidad chilena. Éstos respondieron entrevistas semi-estructuradas, las cuales fueron analizadas post...

El trabajo doméstico no remunerado alude a todas aquellas actividades que se desarrollan en el ámbito doméstico para la subsistencia del hogar y sus miembros, siendo este asociado mayoritariamente a las mujeres. Sin embargo, existe una pequeña población de hombres que también se dedican a estas labores. El presente estudio de carácter exploratorio...