The single string test proved no problem, but unlike dogs (which Osthaus has previously tested) no cat consistently chose correctly between two parallel strings.
一条绳子的情况下没有问题。 但是与狗不同（奥斯陶斯之前给狗做过实验），没有猫能够一直在两条平行的绳子里选择正确。
They were tested in three ways, using a single baited string, two parallel strings where only one was baited, and two crossed strings where only one was baited.
实验用三种方式展开：一条系着诱饵的绳子，两条平行的绳子其中一条上有饵，和两条交叉的绳子其中一条上有饵。
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