Capturing Heightened Impulsivity In Adolescent Mice using A T-Maze Delay Discounting Task
Bibliographic record
Abstract
Delay discounting is a well-established measure of heightened impulsive decision-making during adolescence. The VTA and mPFC are implicated in delay discounting and undergo developmental alterations during adolescence. It remains elusive, however, as to whether the functional maturation of this circuit underlies age-dependent changes in delay discounting. In this study, we used a T-maze delay discounting task and found C57BLK6/J wildtype adolescent mice to exhibit steeper delay discounting than adults with a five second delay contingency. This difference in impulsivity was not driven by age-dependent abilities in cognitive and behavioural flexibility. To measure in vivo calcium signaling in dopaminergic VTA axons in the PL during delay discounting decision-making, we injected a Cre-dependent calcium sensor in TH-cre animals and saw no terminal viral expression after thirty days. Furthermore, TH-Cre adolescent animals exposed to deep anaesthetic ketamine did not exhibit heightened impulsivity compared to adult counterparts.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".