Visual signal detection. II. Signal-location identification.
We have measured the effect of signal-location uncertainty on the detectability of simple visual signals in uncorrelated image noise. An M-alternative forced-choice signal-location identification technique was used with values of M ranging from 2 to 1800. We find high statistical efficiency (50% for aperiodic signals), and results from one value of M can be used to predict all others. The results are consistent with the view that humans can act as suboptimal maximum a posteriori probability observers.
D001288:Attention; D004192:Discrimination, Psychological; D006801:Humans; D010364:Pattern Recognition, Visual; D011601:Psychophysics; D014796:Visual Perception