FIGURE 5-3 Sensitivity and false positive rate in seven field datasets on polygraph validity.

NOTE: Points connected by lines come from the same dataset.

similar to and may be slightly higher than that found from polygraph validity studies using laboratory models. (The interquartile range of accuracy indexes for all 59 datasets, laboratory and field, was from 0.81 to 0.91, the same range as for the laboratory studies alone.) In the next section, we discuss what these data suggest for the accuracy of the full population of polygraph tests in the field.

From Research to Reality

Decision makers are concerned with whether the levels of accuracy achieved in research studies correspond to what can be expected in field polygraph use. In experimental research, extrapolation of laboratory re-



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