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I am flickering letters on and off to participants, controlled by a flicker rate which I am restricting to integer values.

If I want to implement a QUEST staircase to determine the final threshold estimate of the flicker rate, is it possible for the threshold estimate to be of a higher resolution than the grain size of 1 that I have chosen? Phrased differently, how precise will the estimate be? QUEST would be more efficient than method of constant stimuli; however, I do not want to use QUEST if in exchange I have to sacrifice the accuracy of the final threshold.

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