You Are Conducting an Experiment in Which Participants Are Asked

Multiple Choice

You are conducting an experiment in which participants are asked to focus intensely on the black star in the center of the screen. A small blue triangle is flashed for a moment in the right top corner. The failure of some of the participants to see the small blue triangle on the screen illustrates

A) difference threshold.
B) retinal disparity.
C) inattentional blindness.
D) an apparent-distance illusion.