The correct answer rate CR is the rate at which the correct answer option is selected from all video frames.
Spatial scan statistic was used to identify areas and population at high risk at the county level, which corrects for multiple comparisons, adjusts for the heterogeneous population densities among the different areas, detects the foci without prior specification of suspected location or size thereby overcoming pre-selection bias, and allows for adjustment of confounders [ 12, 16, 19].
The response data of percent correct as a function of N was fitted with a Weibull psychometric function, and counting threshold was taken as the midway point between the upper and the lower free floating asymptotes as illustrated in Figure 2A (dotted lines; in this example, counting threshold refers to the number of dots at which ∼63% correct level was obtained).
By limiting the stimulus presentation time, we can determine the maximum number of visual items an observer can correctly enumerate at a criterion level of performance (counting threshold, defined as the number of visual items at which ≈63% correct rate on a psychometric curve), without confounding by eye movements.
Threshold character size is defined as the smallest size at which a correct verbal report of the isolated letter or word can be made at the first attempt.
With this technique, visual acuity is defined as the smallest stimulus size at which a correct answer is obtained for three out of four presented stimuli.
The area under the sROC curve (AUC) was 0.87 (SE = 0.09) with a Q* point value, denoting the diagnostic at which the correct diagnosis is constant for all subjects, of 0.80 (95% CI 0.62-0.97) (SE = 0.0883).
First, a modifier mutation arose at a second locus, which corrects the developmental instability problem (McKenzie 1994).
Another technique which corrects for heterozygosity at each locus, given allele frequencies, is the homozygosity weighted by loci (HL) index [18].
