Finite Mixture Models
Abstract
The important role of finite mixture models in the statistical analysis of data is underscored by the ever-increasing rate at which articles on mixture applications appear in the statistical and general scientific literature. The aim of this article is to provide an up-to-date account of the theory and methodological developments underlying the applications of finite mixture models. Because of their flexibility, mixture models are being increasingly exploited as a convenient, semiparametric way in which to model unknown distributional shapes. This is in addition to their obvious applications where there is group-structure in the data or where the aim is to explore the data for such structure, as in a cluster analysis. It has now been three decades since the publication of the monograph by McLachlan & Basford (1988) with an emphasis on the potential usefulness of mixture models for inference and clustering. Since then, mixture models have attracted the interest of many researchers and have found many new and interesting fields of application. Thus, the literature on mixture models has expanded enormously, and as a consequence, the bibliography here can only provide selected coverage.
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Parametric bootstrap likelihood-ratio test results were discarded because they had local maxima issues in the bootstrapping process.
“Note that Parametric bootstrap likelihood-ratio test (BLRT) (McLachlan et al., 2000) was also performed, but the test results were discarded because they had local maxima issues in the bootstrapping process.”
From Time in treatment: Examining mental illness trajectories across inpatient psychiatric treatment (2020) · cites this paper as McLachlan et al., 2000
Cites
Maximum Likelihood from Incomplete Data Via the <i>EM</i> Algorithm
Dempster, A. P., Laird, N. M., & Rubin, D. B. (1977) · Journal of the Royal Statistical Society Series B: Statistical Methodology · doi:10.1111/j.2517-6161.1977.tb01600.x · Cited by 50,444 · see citing works
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Nylund, K. L., Asparouhov, T., & Muthén, B. O. (2007) · Structural Equation Modeling: A Multidisciplinary Journal · doi:10.1080/10705510701575396 · Cited by 11,415 · see citing works
Missing data: our view of the state of the art
Schafer, J. L., & Graham, J. W. (2002) · Psychological Methods · doi:10.1037/1082-989x.7.2.147 · Cited by 11,638 · see citing works
Top 10 algorithms in data mining
Wu, X., Kumar, V., Ross Quinlan, J., Ghosh, J., Yang, Q., Motoda, H., McLachlan, G. J., Ng, A., Liu, B., Yu, P. S., et al. (2008) · Knowledge and Information Systems · doi:10.1007/s10115-007-0114-2 · Cited by 5,667 · see citing works
Self-citationTesting the number of components in a normal mixture
Lo, Y. (2001) · Biometrika · doi:10.1093/biomet/88.3.767 · Cited by 4,640 · see citing works
Kivela, M., Arenas, A., Barthelemy, M., Gleeson, J. P., Moreno, Y., & Porter, M. A. (2014) · Journal of Complex Networks · doi:10.1093/comnet/cnu016 · Cited by 3,235 · see citing works
The Politics of Authoritarian Rule
Svolik, M. W. (2012) · doi:10.1017/cbo9781139176040 · Cited by 2,611 · see citing works
Latent class analysis: a guide to best practice
Weller, B. E., Bowen, N. K., & Faubert, S. J. (2020) · Journal of Black Psychology · doi:10.1177/0095798420930932 · Cited by 2,223 · see citing works
Spurk, D., Hirschi, A., Wang, M., Valero, D., & Kauffeld, S. (2020) · Journal of Vocational Behavior · doi:10.1016/j.jvb.2020.103445 · Cited by 2,119 · see citing works
Latent Variable Modeling of Differences and Changes with Longitudinal Data
McArdle, J. J. (2009) · Annual Review of Psychology · doi:10.1146/annurev.psych.60.110707.163612 · Cited by 1,952 · see citing works
Using Bayesian model averaging to calibrate forecast ensembles.
Raftery, A. E., Gneiting, T., Balabdaoui, F., & Polakowski, M. (2005) · Monthly Weather Review · doi:10.1175/mwr2906.1 · Cited by 1,915 · see citing works
Marsh, H. W., Lüdtke, O., Trautwein, U., & Morin, A. J. S. (2009) · Structural Equation Modeling: A Multidisciplinary Journal · doi:10.1080/10705510902751010 · Cited by 1,245 · see citing works
Morawska, L., Johnson, G. R., Ristovski, Z. D., Hargreaves, M., Mengersen, K., Corbett, S., Chao, C. Y. H., Li, Y., & Katoshevski, D. (2009) · Journal of Aerosol Science · doi:10.1016/j.jaerosci.2008.11.002 · Cited by 1,129 · see citing works
Beyond Dichotomies: Competence Viewed as a Continuum
Blömeke, S., Gustafsson, J.-E., & Shavelson, R. J. (2015) · Zeitschrift für Psychologie · doi:10.1027/2151-2604/a000194 · Cited by 1,205 · see citing works
On Learning, Representing, and Generalizing a Task in a Humanoid Robot
Calinon, S., Guenter, F., & Billard, A. (2007) · IEEE Transactions on Systems, Man and Cybernetics, Part B (Cybernetics) · doi:10.1109/tsmcb.2006.886952 · Cited by 1,090 · see citing works
Beyond SEM: General latent variable modeling
Muthén, B. O. (2002) · Behaviormetrika · doi:10.2333/bhmk.29.81 · Cited by 1,074 · see citing works
The devil is in the details: an evaluation of recent feature encoding methods
Chatfield, K., Lempitsky, V., Vedaldi, A., & Zisserman, A. (2011) · Procedings of the British Machine Vision Conference 2011 · doi:10.5244/c.25.76 · Cited by 834 · see citing works
Joint Unsupervised Learning of Deep Representations and Image Clusters
Yang, J., Parikh, D., & Batra, D. (2016) · 2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR) · doi:10.1109/cvpr.2016.556 · Cited by 879 · see citing works
Learning Stable Nonlinear Dynamical Systems With Gaussian Mixture Models
Khansari-Zadeh, S. M., & Billard, A. (2011) · IEEE Transactions on Robotics · doi:10.1109/tro.2011.2159412 · Cited by 771 · see citing works
The GRoLTS-Checklist: Guidelines for Reporting on Latent Trajectory Studies
van de Schoot, R., Sijbrandij, M., Winter, S. D., Depaoli, S., & Vermunt, J. K. (2017) · Structural Equation Modeling: A Multidisciplinary Journal · doi:10.1080/10705511.2016.1247646 · Cited by 721 · see citing works
Deconstructing the construct: a network perspective on psychological phenomena
Schmittmann, V. D., Cramer, A. O. J., Waldorp, L. J., Epskamp, S., Kievit, R. A., & Borsboom, D. (2013) · New Ideas in Psychology · doi:10.1016/j.newideapsych.2011.02.007 · Cited by 740 · see citing works
Sensor-based and vision-based human activity recognition: A comprehensive survey
Minh Dang, L., Min, K., Wang, H., Jalil Piran, M., Hee Lee, C., & Moon, H. (2020) · Pattern Recognition · doi:10.1016/j.patcog.2020.107561 · Cited by 730 · see citing works
Haslam, N., Holland, E., & Kuppens, P. (2012) · Psychological Medicine · doi:10.1017/s0033291711001966 · Cited by 611 · see citing works
Sample Size Planning for Statistical Power and Accuracy in Parameter Estimation
Maxwell, S. E., Kelley, K., & Rausch, J. R. (2008) · Annual Review of Psychology · doi:10.1146/annurev.psych.59.103006.093735 · Cited by 542 · see citing works
Bauer, D. J., & Curran, P. J. (2004) · Psychological Methods · doi:10.1037/1082-989x.9.1.3 · Cited by 536 · see citing works
Price, M. J., Ades, A., Soldan, K., Welton, N. J., Macleod, J., Simms, I., DeAngelis, D., Turner, K. M., & Horner, P. J. (2016) · Health Technology Assessment · doi:10.3310/hta20220 · Cited by 494 · see citing works
Priors in whole-genome regression: the Bayesian alphabet returns
Gianola, D. (2013) · Genetics · doi:10.1534/genetics.113.151753 · Cited by 457 · see citing works
The different clinical faces of obstructive sleep apnoea: a cluster analysis
Ye, L., Pien, G. W., Ratcliffe, S. J., Björnsdottir, E., Arnardottir, E. S., Pack, A. I., Benediktsdottir, B., & Gislason, T. (2014) · European Respiratory Journal · doi:10.1183/09031936.00032314 · Cited by 474 · see citing works
Henson, J. M., Reise, S. P., & Kim, K. H. (2007) · Structural Equation Modeling: A Multidisciplinary Journal · doi:10.1080/10705510709336744 · Cited by 429 · see citing works
Trajectories of loneliness during childhood and adolescence: Predictors and health outcomes
Qualter, P., Brown, S. L., Rotenberg, K. J., Vanhalst, J., Harris, R. A., Goossens, L., Bangee, M., & Munn, P. (2013) · Journal of Adolescence · doi:10.1016/j.adolescence.2013.01.005 · Cited by 377 · see citing works
Efficient Greedy Learning of Gaussian Mixture Models
Verbeek, J. J., Vlassis, N., & Kröse, B. (2003) · Neural Computation · doi:10.1162/089976603762553004 · Cited by 340 · see citing works
On the Jensen–Shannon Symmetrization of Distances Relying on Abstract Means
Nielsen, F. (2019) · Entropy · doi:10.3390/e21050485 · Cited by 257 · see citing works
Stability, change, and implications of students’ motivation profiles: A latent transition analysis
Gillet, N., Morin, A. J. S., & Reeve, J. (2017) · Contemporary Educational Psychology · doi:10.1016/j.cedpsych.2017.08.006 · Cited by 252 · see citing works
Wolf, E. J., Lunney, C. A., Miller, M. W., Resick, P. A., Friedman, M. J., & Schnurr, P. P. (2012) · Depression and Anxiety · doi:10.1002/da.21946 · Cited by 198 · see citing works
On the efficiency of targeted clinical trials
Maitournam, A., & Simon, R. (2005) · Statistics in Medicine · doi:10.1002/sim.1975 · Cited by 200 · see citing works
Wolf, E. J., Miller, M. W., Kilpatrick, D., Resnick, H. S., Badour, C. L., Marx, B. P., Keane, T. M., Rosen, R. C., & Friedman, M. J. (2015) · Clinical Psychological Science · doi:10.1177/2167702614545480 · Cited by 188 · see citing works
Cheung, M. W.-L. (2008) · Psychological Methods · doi:10.1037/a0013163 · Cited by 175 · see citing works
Improved amino acid flexibility parameters
Smith, D. K., Radivojac, P., Obradovic, Z., Dunker, A. K., & Zhu, G. (2003) · Protein Science · doi:10.1110/ps.0236203 · Cited by 164 · see citing works
How school climate relates to chronic absence: a multi–level latent profile analysis
Van Eck, K., Johnson, S. R., Bettencourt, A., & Johnson, S. L. (2017) · Journal of School Psychology · doi:10.1016/j.jsp.2016.10.001 · Cited by 159 · see citing works
Harris, R. A., Qualter, P., & Robinson, S. J. (2013) · Journal of Adolescence · doi:10.1016/j.adolescence.2012.12.009 · Cited by 154 · see citing works
Identification of depression subtypes and relevant brain regions using a data-driven approach
Tokuda, T., Yoshimoto, J., Shimizu, Y., Okada, G., Takamura, M., Okamoto, Y., Yamawaki, S., & Doya, K. (2018) · Scientific Reports · doi:10.1038/s41598-018-32521-z · Cited by 136 · see citing works
Dendukuri, N., Schiller, I., Joseph, L., & Pai, M. (2012) · Biometrics · doi:10.1111/j.1541-0420.2012.01773.x · Cited by 117 · see citing works
Portoghese, I., Leiter, M. P., Maslach, C., Galletta, M., Porru, F., D’Aloja, E., Finco, G., & Campagna, M. (2018) · Frontiers in Psychology · doi:10.3389/fpsyg.2018.02105 · Cited by 124 · see citing works
Pietrzak, R. H., Van Ness, P. H., Fried, T. R., Galea, S., & Norris, F. H. (2013) · Journal of Psychiatric Research · doi:10.1016/j.jpsychires.2012.12.005 · Cited by 125 · see citing works
Keystroke Analysis: Reflections on Procedures and Measures
Baaijen, V. M., Galbraith, D., & de Glopper, K. (2012) · Written Communication · doi:10.1177/0741088312451108 · Cited by 124 · see citing works
Valmaggia, L. R., Stahl, D., Yung, A. R., Nelson, B., Fusar-Poli, P., McGorry, P. D., & McGuire, P. K. (2013) · Psychological Medicine · doi:10.1017/s0033291713000251 · Cited by 121 · see citing works
Elhai, J. D., & Contractor, A. A. (2018) · Computers in Human Behavior · doi:10.1016/j.chb.2018.01.010 · Cited by 121 · see citing works
Evidence for a Multi-Dimensional Latent Structural Model of Externalizing Disorders
the Conduct Problems Prevention Research Group, Witkiewitz, K., King, K., McMahon, R. J., Wu, J., Luk, J., Bierman, K. L., Coie, J. D., Dodge, K. A., Greenberg, M. T., et al. (2013) · Journal of Abnormal Child Psychology · doi:10.1007/s10802-012-9674-z · Cited by 110 · see citing works
Ericksen, S. S., Wu, H., Zhang, H., Michael, L. A., Newton, M. A., Hoffmann, F. M., & Wildman, S. A. (2017) · Journal of Chemical Information and Modeling · doi:10.1021/acs.jcim.7b00153 · Cited by 107 · see citing works
Kerschensteiner, D., & Wong, R. O. L. (2008) · Neuron · doi:10.1016/j.neuron.2008.04.025 · Cited by 92 · see citing works
Sahdra, B. K., Ciarrochi, J., Parker, P. D., Basarkod, G., Bradshaw, E. L., & Baer, R. (2017) · European Journal of Personality · doi:10.1002/per.2108 · Cited by 90 · see citing works
Kumari, M., Badrick, E., Sacker, A., Kirschbaum, C., Marmot, M., & Chandola, T. (2010) · Psychoneuroendocrinology · doi:10.1016/j.psyneuen.2010.01.010 · Cited by 92 · see citing works
Chamroukhi, F., Mohammed, S., Trabelsi, D., Oukhellou, L., & Amirat, Y. (2013) · Neurocomputing · doi:10.1016/j.neucom.2013.04.003 · Cited by 88 · see citing works
Cluster randomized trials with treatment noncompliance.
Jo, B., Asparouhov, T., Muthén, B. O., Ialongo, N. S., & Brown, C. H. (2008) · Psychological Methods · doi:10.1037/1082-989x.13.1.1 · Cited by 83 · see citing works
Dissociation and posttraumatic stress disorder: a latent profile analysis
Blevins, C. A., Weathers, F. W., & Witte, T. K. (2014) · Journal of Traumatic Stress · doi:10.1002/jts.21933 · Cited by 85 · see citing works
Perfectionism and Well-Being: A Positive Psychology Framework
Suh, H., Gnilka, P. B., & Rice, K. G. (2017) · Personality and Individual Differences · doi:10.1016/j.paid.2017.01.041 · Cited by 84 · see citing works
Categories and Dimensions: Advancing Psychological Science Through the Study of Latent Structure
Ruscio, J., & Ruscio, A. M. (2008) · Current Directions in Psychological Science · doi:10.1111/j.1467-8721.2008.00575.x · Cited by 78 · see citing works
Murphy, S., Elklit, A., Dokkedahl, S., & Shevlin, M. (2016) · European Journal of Psychotraumatology · doi:10.3402/ejpt.v7.32678 · Cited by 71 · see citing works
Patterns of substance use across the first year of college and associated risk factors
Cho, S. B., Llaneza, D. C., Adkins, A. E., Cooke, M., Kendler, K. S., Clark, S. L., & Dick, D. M. (2015) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2015.00152 · Cited by 68 · see citing works
A systematic review of latent variable mixture modeling research in social work journals
Killian, M. O., Cimino, A. N., Weller, B. E., & Hyun Seo, C. (2019) · Journal of Evidence-Based Social Work · doi:10.1080/23761407.2019.1577783 · Cited by 65 · see citing works
Van Eck, K., Warren, P., & Flory, K. (2017) · Journal of Youth and Adolescence · doi:10.1007/s10964-016-0542-y · Cited by 63 · see citing works
Kavčič, T., Avsec, A., & Zager Kocjan, G. (2022) · Personality and Individual Differences · doi:10.1016/j.paid.2021.111287 · Cited by 62 · see citing works
Cry-based infant pathology classification using GMMs
Farsaie Alaie, H., Abou-Abbas, L., & Tadj, C. (2016) · Speech Communication · doi:10.1016/j.specom.2015.12.001 · Cited by 58 · see citing works
Moate, R. M., Gnilka, P. B., West, E. M., & Bruns, K. L. (2016) · Journal of Counseling & Development · doi:10.1002/jcad.12073 · Cited by 58 · see citing works
Wang, J., Fang, S., Yang, C., Tang, X., Zhu, L., & Nie, Y. (2023) · Psychology Research and Behavior Management · doi:10.2147/prbm.s400757 · Cited by 56 · see citing works
Wessman, J., Paunio, T., Tuulio-Henriksson, A., Koivisto, M., Partonen, T., Suvisaari, J., Turunen, J. A., Wedenoja, J., Hennah, W., Pietiläinen, O. P. H., et al. (2009) · Biological Psychiatry · doi:10.1016/j.biopsych.2009.05.034 · Cited by 52 · see citing works
Predictors and Changes in Paternal Perinatal Depression Profiles—Insights From the DREAM Study
Garthus-Niegel, S., Staudt, A., Kinser, P., Haga, S. M., Drozd, F., & Baumann, S. (2020) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2020.563761 · Cited by 46 · see citing works
Saber, M., Giordano, K. R., Hur, Y., Ortiz, J. B., Morrison, H., Godbout, J. P., Murphy, S. M., Lifshitz, J., & Rowe, R. K. (2020) · European Journal of Neuroscience · doi:10.1111/ejn.14611 · Cited by 46 · see citing works
Hierarchy of speech-driven spectrotemporal receptive fields in human auditory cortex
Venezia, J. H., Thurman, S. M., Richards, V. M., & Hickok, G. (2019) · NeuroImage · doi:10.1016/j.neuroimage.2018.11.049 · Cited by 47 · see citing works
A visual segmentation method for temporal smart card data
Ghaemi, M. S., Agard, B., Trépanier, M., & Partovi Nia, V. (2017) · Transportmetrica A: Transport Science · doi:10.1080/23249935.2016.1273273 · Cited by 42 · see citing works
A finite mixture method for outlier detection and robustness in meta‐analysis
Beath, K. J. (2014) · Research Synthesis Methods · doi:10.1002/jrsm.1114 · Cited by 39 · see citing works
Engagement and abstinence among users of a smoking cessation text message program for veterans
Christofferson, D. E., Hertzberg, J. S., Beckham, J. C., Dennis, P. A., & Hamlett-Berry, K. (2016) · Addictive Behaviors · doi:10.1016/j.addbeh.2016.06.016 · Cited by 33 · see citing works
Mixture-based clustering for the ordered stereotype model
Fernández, D., Arnold, R., & Pledger, S. (2016) · Computational Statistics & Data Analysis · doi:10.1016/j.csda.2014.11.004 · Cited by 39 · see citing works
Trajectories of resilience among widows: a latent transition model
Bennett, K. M., Morselli, D., Spahni, S., & Perrig-Chiello, P. (2020) · Aging & Mental Health · doi:10.1080/13607863.2019.1647129 · Cited by 35 · see citing works
A test of work motivation profile similarity across four distinct samples of employees
Gillet, N., Morin, A. J. S., Ndiaye, A., Colombat, P., & Fouquereau, E. (2020) · Journal of Occupational and Organizational Psychology · doi:10.1111/joop.12322 · Cited by 34 · see citing works
Yoon, S. (2018) · Journal of Child and Family Studies · doi:10.1007/s10826-017-0904-4 · Cited by 31 · see citing works
Hallquist, M. N., & Lenzenweger, M. F. (2013) · Journal of Abnormal Psychology · doi:10.1037/a0030060 · Cited by 26 · see citing works
Learning to Play Minigolf: A Dynamical System-Based Approach
Khansari-Zadeh, S. M., Kronander, K., & Billard, A. (2012) · Advanced Robotics · doi:10.1080/01691864.2012.728692 · Cited by 25 · see citing works
Feeling Loved: A novel brief self-report health measure
Barrett, B., Muller, D., Hayer, S., Ewers, T., Chase, J., Barnet, J. H., & Brown, R. (2019) · EXPLORE · doi:10.1016/j.explore.2018.07.005 · Cited by 19 · see citing works
Time in treatment: Examining mental illness trajectories across inpatient psychiatric treatment
Oh, H., Lee, J., Kim, S., Rufino, K. A., Fonagy, P., Oldham, J. M., Schanzer, B., & Patriquin, M. A. (2020) · Journal of Psychiatric Research · doi:10.1016/j.jpsychires.2020.07.001 · Cited by 15 · see citing works
Sexual aggressors against women’s sexual lives: a latent class analysis
Langevin, S., Proulx, J., & Lacourse, E. (2018) · International Journal of Offender Therapy and Comparative Criminology · doi:10.1177/0306624x17694374 · Cited by 12 · see citing works
Modeling of experts’ divergent prior beliefs for a sequential phase III clinical trial
Moatti, M., Zohar, S., Facon, T., Moreau, P., Mary, J.-Y., & Chevret, S. (2013) · Clinical Trials · doi:10.1177/1740774513493528 · Cited by 11 · see citing works
Redican, E., Murphy, J., McBride, O., Bunting, L., & Shevlin, M. (2022) · Journal of Child & Adolescent Trauma · doi:10.1007/s40653-022-00449-2 · Cited by 10 · see citing works
Dirichlet process mixture models for unsupervised clustering of symptoms in Parkinson's disease
White, N., Johnson, H., Silburn, P., & Mengersen, K. (2012) · Journal of Applied Statistics · doi:10.1080/02664763.2012.710897 · Cited by 9 · see citing works
Etiology and Diagnosis of Major Depression—A Novel Quantitative Approach
Ottesen, J. T. (2013) · Open Journal of Endocrine and Metabolic Diseases · doi:10.4236/ojemd.2013.32018 · Cited by 3 · see citing works
Nuwagaba, S. S., & Mbowa, S. (2026) · Cogent Economics & Finance · doi:10.1080/23322039.2026.2648932
- Authors
- McLachlan, G., & Peel, D.
- Affiliations
- The University of Queensland (AU)
- ORCID
- McLachlan, Geoffrey
- Venue
- Wiley Series in Probability and Statistics
- Publisher
- Wiley
- Published
- 2000-09-18
- Volume
- 6
- Issue
- 1
- Pages
- 355-378
- ISSN
- 1940-6347 (ISSN-L)
- OpenAlex
- W1579271636
- Cited by
- 10,991
- References
- 1
- Citations by year
- 2026: 541 · 2025: 408 · 2024: 387 · 2023: 370 · 2022: 413 · 2021: 556 · 2020: 535 · 2019: 549 · 2018: 522 · 2017: 480 · 2016: 556 · 2015: 572 · 2014: 608 · 2013: 640 · 2012: 594
- FWCI
- 27.34
- Type
- book
- Language
- en
- Open access
- closed
- Locations
- Wiley series in probability and statistics (publishedVersion)
- Annual Review of Statistics and Its Application (publishedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Bayesian Methods and Mixture Models
- Physical Sciences › Computer Science › Artificial Intelligence › Advanced Clustering Algorithms Research
- Physical Sciences › Mathematics › Statistics and Probability › Statistical Distribution Estimation and Applications
- Keywords
- mixture models, semiparametric models, clustering
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