The Limits of the Complex Ideational Material As an Embedded Performance Validity Test – a Case Report
Bibliographic record
Abstract
Objective This paper describes a clinical case illustrating the limitations of the Complex Ideational Material (CIM) as an embedded performance validity test (PVT).Method A comprehensive neuropsychological battery was administered to a 19-year-old male to evaluate the residual effects of a motor vehicle collision.Results The patient passed all free-standing PVTs and the majority of embedded validity indicators. Failing the CIM (≤9) in the context of long-standing, documented deficits in semantic processing and following the difficulty gradient inherent in the task (i.e. all errors occurred on later items) likely represents a false positive.Conclusions Future research on CIM as PVT should include an item-level analysis in addition to the overall score to reduce the risk of misidentifying bona fide deficits as non-credible responding. More broadly, genuine impairment and invalid performance may be psychometrically indistinguishable in individual embedded PVTs. Failures on embedded validity cutoffs should be interpreted in the context of the patient’s clinical history. Routinely administering a comprehensive battery of neuropsychological tests can aid the interpretation of isolated atypical scores.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.013 | 0.015 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".