TY - JOUR
T1 - The effect of search time on perception
AU - Christensen, E. E.
AU - Murry, R. C.
AU - Holland, K.
AU - Reynolds, J.
AU - Landay, M. J.
AU - Moore, J. G.
PY - 1981/1/1
Y1 - 1981/1/1
N2 - A group of 100 carefully selected chest radiographs was read by ten observers, five experienced and five inexperienced. The radiographs were chosen to present the readers with a disproportionately large number of both subtle abnormalities and nonpulmonary lesions. Each reader was allowed to search the radiographs for as long as appropriate, up to a maximum of four minutes. The length of time taken for each observation was recorded to the nearest second. The time-perception data were plotted on both linear and semilogarithmic graphs. The results showed that experienced readers concluded their visual search while they were still making a significant number of true-positive observations and while the true-positive detection rate was higher than the rate for false-positives. For lesions in the central portions of the radiograph (heart, lungs, and pleura), the time-perception curves were biphasic, with both a rapid and a slow component of perception. If these data are plotted on a semilogarithmic scale, each of the two components plots as a straight line. For lesions in the periphery of the radiograph (chest wall and upper abdomen), the time-perception curve is monophasic, showing only a slow component.
AB - A group of 100 carefully selected chest radiographs was read by ten observers, five experienced and five inexperienced. The radiographs were chosen to present the readers with a disproportionately large number of both subtle abnormalities and nonpulmonary lesions. Each reader was allowed to search the radiographs for as long as appropriate, up to a maximum of four minutes. The length of time taken for each observation was recorded to the nearest second. The time-perception data were plotted on both linear and semilogarithmic graphs. The results showed that experienced readers concluded their visual search while they were still making a significant number of true-positive observations and while the true-positive detection rate was higher than the rate for false-positives. For lesions in the central portions of the radiograph (heart, lungs, and pleura), the time-perception curves were biphasic, with both a rapid and a slow component of perception. If these data are plotted on a semilogarithmic scale, each of the two components plots as a straight line. For lesions in the periphery of the radiograph (chest wall and upper abdomen), the time-perception curve is monophasic, showing only a slow component.
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U2 - 10.1148/radiology.138.2.7455116
DO - 10.1148/radiology.138.2.7455116
M3 - Article
C2 - 7455116
AN - SCOPUS:0019379846
VL - 138
SP - 361
EP - 365
JO - Seminars in Fetal and Neonatal Medicine
JF - Seminars in Fetal and Neonatal Medicine
SN - 1744-165X
IS - 2
ER -