Say a participant is shown a reference stimulus of white colour. Afterwards, they are shown a number of test stimuli that range from yellow to blue like this (yellow -> less_yellow -> whitish -> white -> less_whitish -> blueish -> blue) and they are asked to note which one is identical to the reference stimulus
In my experience, the participant is likely to underestimate, and pick the stimulus before the actual "white", but rather somewhere in the area of "whitish". This may be because they're shown stimuli that progressively go towards the target they are looking for, and they are worried they might miss it, and every new stimulus looks more and more like the reference stimulus.
Anyone knows of a psychological bias that relates to this?
Edit: After going through some lists of cognitive biases, contrast effect is similar to what I am referring to, but it does not relate to other facts such as fear of passing the threshold.
Edit2: Less-is-better effect seems to be related to this too.