Plausible values approach for estimating relationship among multiple abilities
Change point analysis for ordinal data
Item order effects in test booklets
Impact of low quality of responses in survey research
Filtering methods for response quality indicators
Low Literacy, Job-Related Training, and Employment Outcomes: A Longitudinal Perspective on the Career Development of Low-literate Adults in Germany
Wallin, G., & Bhaktha, N. (2026). A Latent Variable Model for Response Times with Individual-Specific Change-Points. arXiv preprint arXiv:2605.29182. Under review in Psychometrika. (link)
Uanhoro, J. O. & Bhaktha, N. (2026). Regression Calibration Outperforms Plausible Values for Regression with Scores from Short Scales. Under review in Behavior Research Methods. (link)
Majumdar, S. & Bhaktha, N. (2026). Longitudinal Evaluation of Large Language Models. Under review in Transactions of Machine Learning Research.
Bhaktha, N., Silber, H., & Lechner, C. M. (2026). A unified framework for characterizing response quality in surveys with multi-item scales. Nature Communications Psychology, 4(1), 86. (link)
Groskurth, K., Bhaktha, N., & Lechner, C. M. (2025). The simulation-cum-ROC approach: A new approach to generate tailored cutoffs for fit indices through simulation and ROC analysis. Behavior Research Methods, 57(5): 1-28. (link)
Bhaktha, N. & Lechner, C. M. (2021). To Score or Not to Score? A Simulation Study on the Performance of Test Scores, Plausible Values, and SEM, in Regression With Socio-Emotional Skill or Personality Scales as Predictors. Frontiers in Psychology. (link)
Lechner, C., Bhaktha, N., Groskurth, K. & Bluemke, M. (2021). Why ability point estimates can be pointless: a primer on using skill measures from large-scale assessments in secondary analyses. Measurement Instruments for the Social Sciences, 3(1), 1-16. (link)
O'Connell, A. A., Bhaktha, N., & Zhang, J. (2021). Deciding between Multilevel Poisson and Multilevel Negative Binomial Models: Guiding Questions for Researchers. Society for Research on Educational Effectiveness.
Bhaktha, N. (2018). Properties of hurdle negative binomial models for zero-inflated and overdispersed count data. (link)
Maehler, D. B., Bhaktha, N., Poetzschke, S., & Ramos, H. (2025). Cultural Identity Development in Adult (Forced) Immigrants: The Psychometrics of a Measure in Arabic, Spanish and Ukrainian. International Journal of Intercultural Relations, 105, 102134. (link)
Sawyer, B., O’Connell, A.A., Bhaktha, N., Santoro, J., & Justice, L. (2022). Does Teachers’ Self-Efficacy Vary for Different Children? A Study of Early Childhood Special Educators. Topics in Early Childhood Special Education, 42(1), 50-63. (link)
Bhaktha, N., Radunzel, J., & Mattern, K. (2018). Predicted versus Actual GPA: Do Large Differences Signal an Early Warning for Student Attrition?
Lo, M., Mauck, S., Bhaktha, N., O’Connell, A.A., Reed, S. (2023). Power Analysis and Evidence. In Eds. Leong, F. T., & Austin, J. T. The psychology research handbook: A guide for graduate students and research assistants. Third Edition. Sage Publication.
O’Connell, A.A., Bhaktha, N., & Zhang, J. (2022). Multilevel Models for Counts. In Eds. O’Connell, A.A., McCoach, D.B., & Bell, B.A. Multilevel Modeling Methods with Introductory and Advanced Applications. Information Age Publishing.
Bhaktha, N. (2021). Book Review: Finch, W. H., Bolin, J. E., & Kelley, K. (2019). Multilevel modeling using R. Crc Press. Psychometrika
The OECD Survey on Social and Emotional Skills: Performed scale development and validation, and conducted a study on measurement invariance testing of the social and emotional skills scales. (link)
The Programme for the International Assessment of Adult Competencies: Conducted scale validation, measurement invariance testing and alignment for background questionnaires. (link)
A technical report on Causal Effects of Health on Literacy and Training Participation using German National Educational Panel Study. (link)
Graduating Student Experience Survey Report, Center for Educational Research and Teaching Excellence, IIT Kanpur. (link)
A technical report on the psychometric properties of OCEAN and WEMWBS constructs for adolescents for Millennium Cohort Study. (link)
Standard setting and benchmarking of World Bank's School Readiness Instrument. (link)
Several reports on impact evaluations of educational interventions by NITI AAYOG; and large-scale academic assessments of students in municipal schools across different states in India.