Discussion
The staircase method is a measure of ................. threshold.
Answer: C
The keyed answer is Sensory threshold.
The staircase method is an adaptive form of the method of limits: the stimulus is made weaker after each 'yes' and stronger after each 'no', so the presentations cluster around the threshold and the reversal points are averaged. The same procedure is used to find the absolute threshold (the weakest detectable stimulus) and the difference threshold (the smallest detectable change), so the general term covering what it measures is the sensory threshold.
'Absolute' and 'Difference' each name only one of its two uses, which is why the key prefers the general term. 'Estimate' is not a kind of threshold.
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