ArticlePsychometrika2016
A Note on the Identifiability of Fixed-Effect 3PL Models.
Article in Psychometrika, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed.
- Joint modeling with generalized item response theory model family and response time model: Enhancing model structural flexibility and data-fitting adequacy.Behavior research methods · 2025Article
- On the Identifiability of 3- and 4-Parameter Item Response Theory Models From the Perspective of Knowledge Space Theory.Psychometrika · 2024Article
- Maximization of Some Types of Information for Unidentified Item Response Models with Guessing Parameters.Psychometrika · 2021Article
- An Item Response Model for True-False Exams Based on Signal Detection Theory.Applied psychological measurement · 2020Article
- The Use of an Identifiability-Based Strategy for the Interpretation of Parameters in the 1PL-G and Rasch Models.Psychometrika · 2019Article
- Identification of Confirmatory Factor Analysis Models of Different Levels of Invariance for Ordered Categorical Outcomes.Psychometrika · 2016Article
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Authors and funding
1 author.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In this note, we prove that the 3 parameter logistic model with fixed-effect abilities is identified only up to a linear transformation of the ability scale under mild regularity conditions, contrary to the claims in Theorem 2 of San Martín et al. (Psychometrika, 80(2):450-467, 2015a).
Indexed as
Identifiers
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.