想象与现实的差别在于信号强度

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TheMatrix楼主
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想象与现实的差别在于信号强度

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Abstract

Humans are voracious imaginers, with internal simulations supporting memory, planning and decision-making. Because the neural mechanisms supporting imagery overlap with those supporting perception, a foundational question is how reality and imagination are kept apart. One possibility is that the intention to imagine is used to identify and discount self-generated signals during imagery. Alternatively, because internally generated signals are generally weaker, sensory strength is used to index reality. Traditional psychology experiments struggle to investigate this issue as subjects can rapidly learn that real stimuli are in play. Here, we combined one-trial-per-participant psychophysics with computational modelling and neuroimaging to show that imagined and perceived signals are in fact intermixed, with judgments of reality being determined by whether this intermixed signal is strong enough to cross a reality threshold. A consequence of this account is that when virtual or imagined signals are strong enough, they become subjectively indistinguishable from reality.
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萧武达
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Re: 想象与现实的差别在于信号强度

帖子 萧武达 »

俺的判断是,
想象加强感知, 当符合预期;
想象抵抗感知, 当不合预期。
所以,想象比感知更左右人的判断和行为
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eecs_guy
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Re: 想象与现实的差别在于信号强度

帖子 eecs_guy »

中国共产党未命空间党小组 写了: 3月 31, 2023, 5:16 am 神经元或者说神经系统的信号强度指什么? 神经脉冲的电压幅度大小? 还是脉冲的频率高低?
貌似神经系统信号的强弱是与频率关联的。
那么另一个问题就是,所谓的神经系统的传递信号里面的信息是如何调制的?
串行还是并行?
模拟量还是离散量》
信息是按脉冲的 firing rate 来调制的,就是按频率调制的,所以是脉冲频率调制。
Work smart. Play hard.
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萧武达
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Re: 想象与现实的差别在于信号强度

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数据显示 是频率幅值双因子
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Re: 想象与现实的差别在于信号强度

帖子 TheMatrix楼主 »

佛教修炼讲四禅八定,也有这个意思。
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