Kaernbach C
INSERM unité 229, Université de Bordeaux II, Hôpital Pellegrin, France.
Percept Psychophys. 1991 Mar;49(3):227-9. doi: 10.3758/bf03214307.
This paper proposes a method for adaptive testing that is less complicated than the commonly used transformed up-down methods (1 up 2 down, 1 up 3 down, etc.). In addition, the weighted up-down method can converge to any desired point of the psychometric function. The rule is very simple: Each correct response leads to a decrease in signal level, each incorrect response to an increase. The only difference from the simple up-down method (1 up 1 down) is that the steps upward and the steps downward are of a different size. The straightforward construction of the novel procedure pays off in efficiency and stability: A Monte Carlo simulation reveals a definite advantage, though small, of the weighted up-down method over the 1-up-2-down rule.
本文提出了一种自适应测试方法，该方法比常用的转换上下法（如1上2下、1上3下等）更简单。此外，加权上下法可以收敛到心理测量函数的任何期望点。规则非常简单：每次正确响应会导致信号水平降低，每次错误响应会导致信号水平升高。与简单上下法（1上1下）的唯一区别在于向上和向下的步长大小不同。这种新方法的直接构造在效率和稳定性方面得到了回报：蒙特卡罗模拟显示，加权上下法相对于1上2下规则有一定优势，尽管优势较小。
