降低耳石可靠性下基于可靠性加权的物体运动归因

文献信息

中文摘要

背景： 将世界相对的物体运动与视网膜运动分离需要估计自身运动。我们研究了在递归状态空间观测器中，实验性降低一个前庭观测通道的可靠性如何改变这种归因。方法：我们通过增加生成性耳石噪声来降低有效耳石可靠性，并保持半规管和视觉噪声固定。观测器联合估计自身运动和物体运动，并使用耳石预测误差形成对两个内部可靠性上下文的近似信念。结果：在30对配对实现中，与角自身运动RMSE增加4.37%相比，降低耳石可靠性使假阳性世界运动RMS增加47.61%，物体运动RMSE增加48.77%。仅瞬时残差模型捕获了部分物体事件误差，但未捕获无物体假阳性增加。提供预言机自身运动基本消除了后一效应。两个独立的非递归基线在更嘈杂的耳石输入下也产生更多假阳性运动。两者的物体运动RMSE均高于递归观测器，并且缺乏历史依赖性恢复机制。主要递归效应在可靠性推断固定、适应移除以及两个适应率替换为一个时仍然存在。结论：因此，退化的耳石证据可以将模糊的视网膜证据转向外部运动估计。递归估计改善了物体运动恢复，并使这种归因依赖于预测历史。

英文摘要

Separating world-relative object motion from retinal motion requires an estimate of self-motion. We examined how experimentally degrading one vestibular observation channel alters this attribution in a recurrent state-space observer. We reduced effective otolith reliability by increasing generative otolith noise and held canal and visual noise fixed. The observer jointly estimated self-motion and object motion and used otolith prediction errors to form an approximate belief over two internal reliability contexts. Across 30 paired realizations, reduced otolith reliability increased false-positive world-motion RMS by 47.61% and object-motion RMSE by 48.77%, compared with a 4.37% increase in angular self-motion RMSE. An instantaneous residual-only model captured part of the object-event error but not the object-free false-positive increase. Supplying oracle self-motion largely eliminated the latter effect. Two independent nonrecurrent baselines also produced more false-positive motion under noisier otolith input. Both had higher object-motion RMSE than the recurrent observer and lacked a mechanism for history-dependent recovery. The principal recurrent effect persisted with reliability inference fixed, adaptation removed, and the two adaptation rates replaced by one. Degraded otolith evidence can therefore shift ambiguous retinal evidence toward external-motion estimates. Recurrent estimation improves object-motion recovery and makes this attribution dependent on predictive history.