W judgments are a widely used intention timing awareness estimate. These judgments are typically obtained by using the classic Libet-style paradigm whereby participants are asked to estimate the time they become aware of their intention to act by using the location of a rotating object on a clock face. There is an inconsistency in the Libet clock parameters used in previous studies, and it is unclear whether this variability impacts W judgments and other outcome measures, with implications for the construct validity of this measure and the generalisability of results across studies. Here, we present a four-experiment study that systematically manipulated the Libet clock speed, number of clock markings, length of the clock hand and type of clock radius in order to examine whether these parameter manipulations affect intention timing awareness estimates. Our results demonstrate W judgments can be significantly influenced by the clock speed and number of clock markings. The meaning and implications of these results are discussed.

W判断是一种广泛使用的意图时间意识估计。这些判断通常是通过使用经典的 Libet 式范例获得的，参与者被要求估计他们通过使用钟面上旋转物体的位置来估计他们意识到自己的行为意图的时间。先前研究中使用的 Libet 时钟参数存在不一致，尚不清楚这种可变性是否会影响 W 判断和其他结果测量，从而影响该测量的结构有效性和研究结果的普遍性。在这里，我们提出了一项系统地操纵 Libet 时钟速度、时钟标记数量、时钟指针的长度和时钟半径的类型，以检查这些参数操作是否影响意图计时意识估计。我们的结果表明 W 判断会受到时钟速度和时钟标记数量的显着影响。讨论了这些结果的意义和含义。