Sentence examples for counting thresholds from inspiring English sources
The arrow in the figure indicates the difference in counting thresholds between the youngest and the oldest groups, equivalent to a change of about 30%.
On the other hand, the reduction in counting thresholds with age may be more closely related to an attenuation in spatial selective attention [26] or to the ability to retrieve relevant stimulus information, such as contrast and position from visual memory [52] and count the number dot-by-dot, or group-by-group.
Surprisingly, despite the degraded counting thresholds in the older observers, their ability to count the number of dots was, on average, quite accurate (i.e. veridical - Fig. 3A).
The mean counting thresholds were systematically decreased from 7.01±0.30 (21 30-yr-old 21 30-yr-old 21 30-yr-old-yr-old) across differentoage groups.
Therefore, two elderly observers (KG, 67-yr-old; MA, 65-yr-old) with the lowest counting thresholds were selected to repeatedly practice the counting task (6 sessions in total; each with 400 trials), in order to evaluate the effect of practice.
The present findings serve as baseline normative data for measures of counting threshold as a function of age.
Each block consisted of 100 trials, 10 trials for each N. To determine the precision of the judgment, we estimate a counting threshold.
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).
c-Fos-positive nuclei were counted relative to a counting threshold based on staining intensity and target size.
In 2008, the CD4+ T cell counts threshold for treatment was increased to 350 cells/mm [ 24].
Recall that the counting threshold reflects the maximum number of items (out of 10) that an observer can correctly enumerate at a criterion level of performance.
