Ivan Makarov, Snorri Steinn Stefánsson Thors, Elvar Atli Aevarsson, Finnur Kári Pind Jörgensson, Nashmin Yeganyeh, Árni Kristjánsson, Runar Unnthorsson
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引用次数: 1
摘要
当对观察者的下背部连续施加两个短暂的振动触觉刺激时,会出现系统性的刺激定位错误:如果第二个刺激强度高于第一个刺激强度,观察者倾向于认为第二个刺激高于第一个刺激强度,而当弱强度刺激紧跟着强强度刺激强度时,观察者倾向于认为第二个刺激强度高于第一个刺激强度,反之亦然。这种触觉错位效应被称为强度顺序错觉。在最初的幻觉演示中,刺激的频率和幅度是密不可分的,因此幅度的变化也会导致频率的变化。因此,尚不清楚这种错觉是由频率、幅度或两者的变化引起的。为了测试这一点,我们进行了一个多因素实验,其中我们使用了允许独立操作频率和幅度的L5致动器。这种方法使我们能够研究刺激幅度、频率和位置的影响,并评估这些因素之间的潜在相互作用。我们报告了四个主要发现:1)我们能够复制强度顺序与L5内壁错觉,2)错觉主要发生在向上的方向,或者换句话说,当强烈刺激后发生了较弱的一个高于或在相同的位置作为第一个刺激,3)幻觉没有发生类似的刺激模式应用于水平方向时,4)幻觉完全是由于振幅的变化,而变化的频率(100 Hz vs 200 Hz)没有影响。
The Haptic Intensity Order Illusion is Caused by Amplitude Changes
When two brief vibrotactile stimulations are sequentially applied to observers’ lower back,there is systematic mislocalization of the stimulation: If the second stimulation is of higher intensity than the first one, observers tend to respond that the second stimulation was above the first one, and vice versa when weak intensity stimulation follows a strong one. This haptic mislocalization effect has been called the intensity order illusion . In the original demonstration of the illusion, frequency and amplitude of the stimulation were inextricably linked so that changes in amplitude also resulted in changes in frequency. It is therefore unknown whether the illusion is caused by changes in frequency, amplitude or both. To test this, we performed a multifactorial experiment, where we used L5 actuators that allow independent manipulation of frequency and amplitude. This approach enabled us to investigate the effects of stimulus amplitude, frequency and location and assess any potential interactions between these factors. We report four main findings: 1) we were able to replicate the intensity order illusion with the L5 tactors, 2) the illusion mainly occurred in the upwards direction, or in other words, when strong stimulation following a weaker one occurred above or in the same location as the first stimulation, 3) the illusion did not occur when similar stimulation patterns were applied in the horizontal direction and 4) the illusion was solely due to changes in amplitude, while changes in frequency (100 Hz vs 200 Hz) had no effect.
期刊介绍:
ACM Transactions on Applied Perception (TAP) aims to strengthen the synergy between computer science and psychology/perception by publishing top quality papers that help to unify research in these fields.
The journal publishes inter-disciplinary research of significant and lasting value in any topic area that spans both Computer Science and Perceptual Psychology. All papers must incorporate both perceptual and computer science components.