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arxiv: 2605.16932 · v1 · pith:NYWU6MNEnew · submitted 2026-05-16 · 💻 cs.RO

MORN: Metacognitive Object-Goal Regulation for Resource-Rational Long-Horizon Navigation

Pith reviewed 2026-05-19 20:23 UTC · model grok-4.3

classification 💻 cs.RO
keywords object goal navigationlong-horizon navigationmetacognitive controlresource rationalitydual-process theoryroboticsvision-language modelspartial observability
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The pith

MORN adds a metacognitive meta-controller to frozen navigation agents so they can estimate progress velocity and perceptual uncertainty and abort infeasible subgoals early.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper presents MORN as a way to give long-horizon object navigation agents resource awareness they currently lack. Purely reactive agents using vision-language models often exhaust time and battery chasing subgoals that turn out to be unreachable under partial observability. MORN layers a higher-level controller on top of any existing navigation backbone; the controller tracks three internal states to decide whether to keep pursuing a goal or switch. This change raises goal completion rate from 0.23 to 0.30 and cuts wasted steps from 0.90 to 0.70 on the HM3D benchmark. The result matters because real robots operate under hard limits on energy and time, so early abandonment of dead-end missions preserves capacity for the rest of the task.

Core claim

MORN augments frozen navigation backbones with a System 2 meta-controller that continuously monitors the System 1 locomotor by formalizing Potentiality Index, Persistence Gating, and Evidence Accumulation; it then dynamically regulates the mission schedule according to online estimates of progress velocity and perceptual uncertainty, neutralizing the sunk cost fallacy so agents abort zombie goals early and commit to achievable ones.

What carries the argument

The System 2 meta-controller that monitors the System 1 locomotor using three neuro-cognitive states to estimate progress velocity and perceptual uncertainty and regulate the mission schedule.

If this is right

  • Agents reach more goals without retraining or replacing the underlying navigation model.
  • Fewer steps are spent on unreachable subgoals, preserving battery and time for remaining mission segments.
  • The same regulation logic applies across different frozen backbones and environments with partial observability.
  • Local exploration can be balanced against global mission viability without explicit global planning.
  • Early termination of infeasible goals reduces exposure to compounding errors from repeated failed attempts.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same three-state monitoring approach could be tested on mobile manipulation tasks where partial observability also produces zombie subgoals.
  • Real-world battery-life gains would follow if the controller's estimates remain accurate when sensor noise increases beyond simulation levels.
  • The architecture suggests a general template for adding lightweight executive oversight to any reactive policy in long-horizon sequential decision problems.

Load-bearing premise

The three neuro-cognitive states can be formalized and estimated online from a frozen navigation backbone in a way that reliably distinguishes feasible from infeasible subgoals under partial observability.

What would settle it

An ablation experiment on HM3D that disables the meta-controller estimates or replaces them with random values and measures whether goal completion rate stays at 0.23 and wasted step fraction stays at 0.90.

Figures

Figures reproduced from arXiv: 2605.16932 by Jiaqiao Tang, Jiayi Li, Kangyi Wu, Lin Zhao, Qingrong He, Xi Lin.

Figure 1
Figure 1. Figure 1: Obsessive vs. Metacognitive Behavior. Left: Standard ObjectNav agents fall into the “Sunk Cost Trap,” exhausting the global budget on a single infeasible goal. Right: MORN enforces “Resource Rationality” by strategically aborting “zombie goals” early. This preserves critical resources (time/battery) for subsequent solvable targets, maximizing overall mission utility. decision that requires estimating the e… view at source ↗
Figure 2
Figure 2. Figure 2: MORN Dual-Process Architecture. The framework decouples navigation into two distinct systems. System 1 (Bottom) is a reactive navigation backbone that handles locomotion and perception. System 2 (Top) acts as the metacognitive executive. It monitors the backbone via the Upward Bus, computing three neuro-cognitive states (Feasibility Πt , Commitment Γt , Evidence Σt). Based on these states, the Meta-Action … view at source ↗
Figure 3
Figure 3. Figure 3: Benchmark statistics (N=500 episodes). Distribution of goal counts, geodesic distances, object categories, and inter-goal distances. The benchmark stresses long-horizon scheduling with realistic goal separations and category diversity. remaining global budget: Bsub(t) = min 300,max Bmax −t |Grem| ,50. (9) Episode construction follows a controlled composition rule: we sample K ∈ {2,3} goal categories th… view at source ↗
Figure 4
Figure 4. Figure 4: Qualitative timeline of a real-world multi-goal episode. Top: [PITH_FULL_IMAGE:figures/full_fig_p006_4.png] view at source ↗
Figure 6
Figure 6. Figure 6: Threshold Sensitivity. Performance remains stable across τΣ ∈ [0.5,0.7]. The multi-modal Σt creates a robust decision boundary. remaining budget toward goals with better marginal returns. MGSR remains low even for improved methods because all￾goal success is a conjunction that becomes structurally sparse as K increases; for deployment, CR and WSF more directly capture user utility and time efficiency. Fina… view at source ↗
Figure 7
Figure 7. Figure 7: Timeline Analysis of a 3-Goal Episode. Top: ITM confidence over time. Middle: Cognitive states evolution. Bottom: Active goal and resource consumption. MORN commits only when Σt peaks, not on transient spikes. effectively converts wasted steps into successful searches for alternative goals. C. Qualitative Case Study We analyze the internal dynamics of MORN during a successful 3-goal run (based on video dat… view at source ↗
Figure 9
Figure 9. Figure 9: Failure Mode Decomposition. We categorize failed episodes by cause. While baselines (Fixed/Reactive) are dominated by “No De￾tection” (Red)–implying resource exhaustion–MORN significantly shrinks this category. Instead, failures shift to “SWITCH” (Orange) and “ABORT” (Yellow), confirming that the agent is actively managing failures via strategic abandonment rather than passively draining the budget [PITH_… view at source ↗
read the original abstract

Robots deployed in unstructured human environments must frequently execute long-horizon missions, such as find the mug, then the chair, then the printer, under strict operational constraints. While contemporary zero-shot Object Navigation (ObjectNav) agents leverage Vision-Language Models (VLMs) to effectively localize semantic targets, they operate as purely reactive systems that inherently lack global resource awareness. Consequently, these agents inadvertently exhaust critical budgets, including time and battery, on infeasible subgoals due to partial observability, failing to balance local exploration with global mission viability. To bridge this gap by injecting resource-rationality into the navigation loop, we present MORN (Metacognitive Object-goal Regulation Navigation), an executive architecture inspired by Dual-Process Theory in cognitive science. MORN augments frozen navigation backbones with a System 2 meta-controller that continuously monitors the System 1 locomotor. By formalizing three neuro-cognitive states, Potentiality Index, Persistence Gating, and Evidence Accumulation, MORN dynamically regulates the mission schedule based on online estimates of progress velocity and perceptual uncertainty. This mechanism effectively neutralizes the Sunk Cost Fallacy, enabling agents to abort zombie goals early and decisively commit to achievable ones. Extensive experiments on the HM3D dataset demonstrate that MORN improves Goal Completion Rate (CR) from 0.23 to 0.30 and reduces Wasted Step Fraction (WSF) from 0.90 to 0.70, establishing that in resource-constrained autonomy, the metacognitive awareness of global resources is as critical as the reactive ability to navigate.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript introduces MORN, an executive architecture that augments frozen ObjectNav backbones with a System-2 meta-controller. The controller formalizes three neuro-cognitive states (Potentiality Index, Persistence Gating, Evidence Accumulation) to monitor online progress velocity and perceptual uncertainty, thereby regulating subgoal persistence and mitigating sunk-cost behavior on infeasible long-horizon missions. Experiments on HM3D report raising Goal Completion Rate from 0.23 to 0.30 and lowering Wasted Step Fraction from 0.90 to 0.70.

Significance. If the mechanism and gains are reproducible, the work supplies a lightweight, backbone-agnostic route to resource-rational navigation that preserves the strengths of existing reactive agents while adding global viability awareness. The modest, directionally consistent improvements and the explicit separation of System-1 locomotion from System-2 regulation are practical strengths for deployment under time and energy constraints.

major comments (2)
  1. [§4] §4 (Experiments): the reported CR and WSF deltas are presented without baselines, episode counts, random seeds, variance, or statistical significance tests, preventing assessment of whether the 0.23-to-0.30 and 0.90-to-0.70 changes are reliable or merely within run-to-run fluctuation.
  2. [§3.1–3.3] §3.1–3.3: the online estimation procedures for Potentiality Index, Persistence Gating, and Evidence Accumulation are described at a high level but lack explicit equations or pseudocode showing how each quantity is computed from a frozen backbone’s outputs under partial observability; this is load-bearing for the claim that the meta-controller can reliably distinguish feasible from infeasible subgoals.
minor comments (2)
  1. [Abstract] Abstract: the baseline agent achieving the 0.23/0.90 figures is not named; adding this single clause would improve immediate readability.
  2. [§3] Notation: the three states are introduced with capitalized names but later referenced inconsistently; a single definitions table or consistent acronym usage would reduce reader effort.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their constructive and detailed feedback. We address each major comment below and outline the revisions we will incorporate to strengthen the manuscript.

read point-by-point responses
  1. Referee: [§4] §4 (Experiments): the reported CR and WSF deltas are presented without baselines, episode counts, random seeds, variance, or statistical significance tests, preventing assessment of whether the 0.23-to-0.30 and 0.90-to-0.70 changes are reliable or merely within run-to-run fluctuation.

    Authors: We agree that the experimental reporting in §4 requires additional rigor to allow proper evaluation of the reported improvements. The initial submission presented aggregate deltas without sufficient supporting statistics. In the revised manuscript we will expand §4 to include: the total number of evaluation episodes and scenes used, the random seeds for reproducibility, mean and standard deviation of CR and WSF across multiple runs, and results of appropriate statistical tests (e.g., paired t-tests or Wilcoxon signed-rank tests) confirming that the observed changes exceed run-to-run variability. We will also explicitly restate the baseline conditions against which the 0.23-to-0.30 and 0.90-to-0.70 figures are measured. revision: yes

  2. Referee: [§3.1–3.3] §3.1–3.3: the online estimation procedures for Potentiality Index, Persistence Gating, and Evidence Accumulation are described at a high level but lack explicit equations or pseudocode showing how each quantity is computed from a frozen backbone’s outputs under partial observability; this is load-bearing for the claim that the meta-controller can reliably distinguish feasible from infeasible subgoals.

    Authors: We concur that explicit computational definitions are necessary to substantiate the meta-controller’s ability to operate under partial observability. Although the manuscript outlines the neuro-cognitive states conceptually, it does not supply the precise update rules. In the revision we will add, in §3, the full mathematical formulations: Potentiality Index as a normalized function of estimated progress velocity and perceptual uncertainty derived from VLM confidence scores; Persistence Gating as a dynamic threshold applied to accumulated evidence; and Evidence Accumulation as a recursive Bayesian-style update over successive observations. We will also insert pseudocode that shows the exact sequence of operations performed on the frozen backbone’s outputs (e.g., object detection logits, spatial embeddings, and uncertainty estimates) at each time step. revision: yes

Circularity Check

0 steps flagged

No significant circularity detected

full rationale

The paper describes MORN as an executive architecture that augments a frozen navigation backbone with a System 2 meta-controller monitoring progress velocity and perceptual uncertainty via three formalized neuro-cognitive states. All reported performance gains (CR from 0.23 to 0.30, WSF from 0.90 to 0.70 on HM3D) are presented as empirical outcomes of this added mechanism rather than quantities derived from or fitted to the same experimental data. No equations, self-citations, or uniqueness theorems are invoked in the provided text to justify the core claims, leaving the derivation chain self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 3 invented entities

The central claim rests on the assumption that cognitive-science dual-process concepts can be directly translated into a functional meta-controller for navigation; the three named states are introduced without independent empirical grounding outside the reported experiments.

axioms (1)
  • domain assumption Dual-Process Theory from cognitive science provides a useful model for separating reactive navigation from higher-level resource monitoring in robots.
    The paper states it is inspired by Dual-Process Theory to justify the System 1 / System 2 split.
invented entities (3)
  • Potentiality Index no independent evidence
    purpose: Online estimate of progress velocity toward the current object goal
    One of the three neuro-cognitive states formalized to monitor mission viability
  • Persistence Gating no independent evidence
    purpose: Decision mechanism to abort or continue a subgoal and avoid sunk-cost behavior
    One of the three neuro-cognitive states formalized to regulate commitment
  • Evidence Accumulation no independent evidence
    purpose: Handling of perceptual uncertainty to inform goal viability
    One of the three neuro-cognitive states formalized for uncertainty-aware regulation

pith-pipeline@v0.9.0 · 5832 in / 1466 out tokens · 46843 ms · 2026-05-19T20:23:09.884225+00:00 · methodology

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Lean theorems connected to this paper

Citations machine-checked in the Pith Canon. Every link opens the source theorem in the public Lean library.

  • IndisputableMonolith/Foundation/AbsoluteFloorClosure.lean reality_from_one_distinction unclear
    ?
    unclear

    Relation between the paper passage and the cited Recognition theorem.

    MORN augments frozen navigation backbones with a System 2 meta-controller that continuously monitors the System 1 locomotor. By formalizing three neuro-cognitive states, Potentiality Index, Persistence Gating, and Evidence Accumulation, MORN dynamically regulates the mission schedule based on online estimates of progress velocity and perceptual uncertainty.

  • IndisputableMonolith/Cost/FunctionalEquation.lean washburn_uniqueness_aczel echoes
    ?
    echoes

    ECHOES: this paper passage has the same mathematical shape or conceptual pattern as the Recognition theorem, but is not a direct formal dependency.

    This mechanism effectively neutralizes the Sunk Cost Fallacy, enabling agents to abort zombie goals early and decisively commit to achievable ones.

What do these tags mean?
matches
The paper's claim is directly supported by a theorem in the formal canon.
supports
The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
extends
The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
uses
The paper appears to rely on the theorem as machinery.
contradicts
The paper's claim conflicts with a theorem or certificate in the canon.
unclear
Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.

Reference graph

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