Holographic Declarative Memory and the Fan Effect: A Test Case for A New Memory Module for ACT-R
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Bibliographic record
Abstract
We present Holographic Declarative Memory (HDM), a newmemory module for ACT-R and alternative to ACT-R’sDeclarative Memory (DM). ACT-R is a widely used cognitivearchitecture that models many different aspects of cognition,but is limited by its use of words as symbols to representideas or stimuli. HDM replaces the symbols with holographicvectors. Holographic vectors retain the expressive power ofsymbols but have a similarity metric, allowing for shades ofmeaning, fault tolerance, and lossy compression. The purposeof HDM is to enhance ACT-R’s ability to learn associations,learn over the long-term and store large quantities of data, anduse partial or fuzzy matching. To demonstrate HDM, we fitperformance of an ACT-R model that uses HDM to abenchmark memory task, the fan effect.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| 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 it