THE EFFECT OF SEARCH TIME ON PERCEPTION
THE EFFECT OF SEARCH TIME ON PERCEPTION
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DOI：
10.1148/radiology.138.2.7455116
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发表时间：
1981-01-01
期刊：
影响因子：
19.7
通讯作者：
MOORE, JG
中科院分区：
文献类型：
--
作者：
CHRISTENSEN, EE;MURRY, RC;MOORE, JG
由10名观察员（5名经验丰富的观察员和5名经验不足的观察员）阅读了一组100张精心挑选的胸片。选择X线片向读片者呈现不成比例的大量细微异常和非肺部病变。允许每位阅片人在适当的时间内搜索X线片，最长不超过4分钟。记录每次观察所用的时间长度，精确到最近的秒。时间知觉数据绘制在线性和半对数图上。经验丰富的读者结束他们的视觉搜索，而他们仍然作出了显着数量的真阳性观察和真阳性检出率高于假阳性率。对于射线照片中心部分（心脏、肺和胸膜）的病变，时间感知曲线是双相的，具有快速感知和缓慢感知的部分。如果这些数据以半对数标度绘制，则2个分量中的每一个都以直线绘制。对于X线片周边（胸壁和上腹部）的病变，时间感知曲线是双相的，仅显示慢分量。
A group of 100 carefully selected chest radiographs was read by 10 observers, 5 experienced and 5 inexperienced. The radiographs were chosen to present the readers with a disproportionately large number of subtle abnormalities and nonpulmonary lesions. Each reader was allowed to search the radiographs for as long as appropriate, up to a maximum of 4 min. The length of time taken for each observation was recorded to the neasrest second. The time-perception data were plotted on linear and semilogarithmic graphs. Experienced readers concluded their visual search while they were still making a significant number of true-positive observations and 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 a rapid and a slow component of perception. If these data are plotted on a semilogarithmic scale, each of the 2 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.