This review focuses on covert attention and how it alters early vision. I explain why attention
is considered a selective process, the constructs of covert attention, spatial endogenous and …

Visual stimuli contain a limited amount of information that could potentially be used to
perform a given visual task. At successive stages of visual processing, some of this …

Diapositive 1 Page 1 THEORIE DE LA DETECTION DU SIGNAL La Théorie de la Détection du
Signal (TDS) est à la fois un instrument de mesure de la performance* et un cadre théorique …

Contrast masking was studied psychophysically. A two-alternative forced-choice procedure
was used to measure contrast thresholds for 2.0 cpd sine-wave gratings in the presence of …

Both the speed and the accuracy of a perceptual judgment depend on the strength of the
sensory stimulation. When stimulus strength is high, accuracy is high and response time is …

More than 20 years ago, Tanner [Ann. NY Acad. Sci. 89, 752 (1961)] noted that observers
asked to detect a signal act as though they are uncertain about the physical characteristics …

An ideal observer is a hypothetical device that performs optimally in a perceptual task given
the available information. The theory of ideal observers has proven to be a powerful and …

Most theories of visual search emphasize issues of limited versus unlimited capacity and
serial versus parallel processing. In the present article, we suggest a broader framework …

We have measured the overall statistical efficiency of human subjects discriminating the
amplitude of visual pattern signals added to noisy backgrounds. By changing the noise …

Originally published in 1985, this volume presents the proceedings of the 11th International
Symposium on Attention and Performance. With few exceptions, the central emphasis in …