Search Results - "Fisher, Zachary F."

Associations between somatomotor-putamen resting state connectivity and obsessive-compulsive symptoms vary as a function of stress during early adolescence: Data from the ABCD study by Petrie, Daniel J., Meeks, Kathleen D., Fisher, Zachary F., Geier, Charles F.

“…Obsessive-compulsive symptoms (OCS) are relatively common during adolescence although most individuals do not meet diagnostic criteria for obsessive-compulsive…”
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What ergodicity means for you by Hunter, Michael D., Fisher, Zachary F., Geier, Charles F.

“…This paper explores the relation between within-person and between-person research designs using the concept of ergodicity from statistical mechanics in…”
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Group Integrative Dynamic Factor Models With Application to Multiple Subject Brain Connectivity by Kim, Younghoon, Fisher, Zachary F, Pipiras, Vladas

“…This work introduces a novel framework for dynamic factor model-based group-level analysis of multiple subjects time-series data, called GRoup Integrative…”
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Latent Variable GIMME Using Model Implied Instrumental Variables (MIIVs) by Gates, Kathleen M, Fisher, Zachary F, Bollen, Kenneth A

“…Researchers across many domains of psychology increasingly wish to arrive at personalized and generalizable dynamic models of individuals' processes. This is…”
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Penalized Estimation and Forecasting of Multiple Subject Intensive Longitudinal Data by Fisher, Zachary F., Kim, Younghoon, Fredrickson, Barbara L., Pipiras, Vladas

“…Intensive longitudinal data (ILD) is an increasingly common data type in the social and behavioral sciences. Despite the many benefits these data provide,…”
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Prospective associations between stressors and alcohol use from early adolescence to young adulthood in Mexican-origin youth in the United States by Martinez, Griselda, Maggs, Jennifer L, Bámaca, Mayra Y, Fisher, Zachary F, Robins, Richard W

“…Stressors experienced across multiple domains (e.g., family and peers) may contribute to alcohol use trajectories; however, little is known about the…”
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Optimal Instrument Selection Using Bayesian Model Averaging for Model Implied Instrumental Variable Two Stage Least Squares Estimators by Henry, Teague R., Fisher, Zachary F., Bollen, Kenneth A.

“…Model-Implied Instrumental Variable Two-Stage Least Squares (MIIV-2SLS) is a limited information, equation-by-equation, noniterative estimator for latent…”
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An Instrumental Variable Estimator for Mixed Indicators: Analytic Derivatives and Alternative Parameterizations by Fisher, Zachary F., Bollen, Kenneth A.

“…Methodological development of the model-implied instrumental variable (MIIV) estimation framework has proved fruitful over the last three decades. Major…”
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An Introduction to Model Implied Instrumental Variables Using Two Stage Least Squares (MIIV-2SLS) in Structural Equation Models (SEMs) by Bollen, Kenneth A., Fisher, Zachary F., Giordano, Michael L., Lilly, Adam G., Luo, Lan, Ye, Ai

“…Structural equation models (SEMs) are widely used to handle multiequation systems that involve latent variables, multiple indicators, and measurement error…”
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Blind Subgrouping of Task-based fMRI by Fisher, Zachary F., Parsons, Jonathan, Gates, Kathleen M., Hopfinger, Joseph B.

“…Significant heterogeneity in network structures reflecting individuals’ dynamic processes can exist within subgroups of people (e.g., diagnostic category,…”
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Estimating Both Directed and Undirected Contemporaneous Relations in Time Series Data Using Hybrid-Group Iterative Multiple Model Estimation by Luo, Lan, Fisher, Zachary F., Arizmendi, Cara, Molenaar, Peter C. M., Beltz, Adriene, Gates, Kathleen M.

“…Researchers across varied fields increasingly are collecting and analyzing intensive longitudinal data (ILD) to examine processes across time at the individual…”
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Contamination bias in the estimation of child maltreatment causal effects on adolescent internalizing and externalizing behavior problems by Felt, John M., Chimed‐Ochir, Ulziimaa, Shores, Kenneth A., Olson, Anneke E., Li, Yanling, Fisher, Zachary F., Ram, Nilam, Shenk, Chad E.

“…Background When unaddressed, contamination in child maltreatment research, in which some proportion of children recruited for a nonmaltreated comparison group…”
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Contamination in Observational Research on Child Maltreatment: A Conceptual and Empirical Review With Implications for Future Research by Shenk, Chad E, Shores, Kenneth A, Ram, Nilam, Felt, John M, Chimed-Ochir, Ulziimaa, Olson, Anneke E, Fisher, Zachary F

“…Contamination is a methodological phenomenon occurring in child maltreatment research when individuals in an established comparison condition have, in reality,…”
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A Limited Information Estimator for Dynamic Factor Models by Fisher, Zachary F., Bollen, Kenneth A., Gates, Kathleen M.

“…Structural equation modeling (SEM) is an increasingly popular method for examining multivariate time series data. As in cross-sectional data analysis,…”
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Assessing the Robustness of Cluster Solutions Obtained From Sparse Count Matrices by Gates, Kathleen M., Fisher, Zachary F., Arizmendi, Cara, Henry, Teague R., Duffy, Kelly A., Mucha, Peter J.

“…Psychological researchers often seek to obtain cluster solutions from sparse count matrices (e.g., social networks; counts of symptoms that are in common for 2…”
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Evaluating Discrete Time Methods for Subgrouping Continuous Processes by Park, Jonathan J, Fisher, Zachary F, Chow, Sy-Miin, Molenaar, Peter C M

“…Rapid developments over the last several decades have brought increased focus and attention to the role of time scales and heterogeneity in the modeling of…”
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A Square-Root Second-Order Extended Kalman Filtering Approach for Estimating Smoothly Time-Varying Parameters by Fisher, Zachary F., Chow, Sy-Miin, Molenaar, Peter C. M., Fredrickson, Barbara L., Pipiras, Vladas, Gates, Kathleen M.

“…Researchers collecting intensive longitudinal data (ILD) are increasingly looking to model psychological processes, such as emotional dynamics, that organize…”
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Affect and Personality: Ramifications of Modeling (Non-)Directionality in Dynamic Network Models by Park, Jonathan J., Chow, Sy-Miin, Fisher, Zachary F., Molenaar, Peter C. M.

“…The use of dynamic network models has grown in recent years. These models allow researchers to capture both lagged and contemporaneous effects in longitudinal…”
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Structured Estimation of Heterogeneous Time Series by Fisher, Zachary F., Kim, Younghoon, Pipiras, Vladas, Crawford, Christopher, Petrie, Daniel J., Hunter, Michael D., Geier, Charles F.

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Robust Estimation and Dynamic Models by Fisher, Zachary F

“…This dissertation follows the three paper format. Each paper addresses core issues confronting contemporary psychometric research, including the imperfect…”
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