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Masking disrupts recovery of location information

1993; Springer Science+Business Media; Volume: 54; Issue: 6 Linguagem: Inglês

10.3758/bf03211800

1532-5962

D. J. K. Mewhort, M. Frank Huntley, Hilary Duff-Fraser,

EEG and Brain-Computer Interfaces

In two experiments, we tested subjects’ ability to localize a letter in a character string with identification controlled by varying the delay of a mask, dimming the display, or deleting some of the dots used to define the letters on the cathode-ray screen. The first experiment involved two tasks. In the first task, subjects indicated whether or not a letter named verbally had been present in an eight-letter target string. In the second task, they localized a letter named verbally in the target string; the target string was presented by using display parameters shown in the first task to hold character identification between 70% and 75% correct. In the second experiment, we tallied errors in a partial-report bar-probe study after equating performance across the manipulations of display quality. Masking disrupted subjects’ ability to recover location information more than either a manipulation of stimulus luminance or a manipulation of its visual form.