Imagine
that we obtained the following psychophysical function from an observer whose task was to judge whether or not sugar was tasted in a cup of water.

1. What is the scale on each axis?

2. Pick a data point and explain how it would be produced according to the Method of Limits.

3. Explain how that data point would be produced to the Method of Constant Stimuli.

4. What is the absolute threshold in this case?