Below 3 Hz, the difference in the power spectrum density (PSD) is larger and the coherence decreases.
The difficulty of the discrimination was varied parametrically from trial-to-trial by adjusting the percentage of dots in coherent motion: the task was easy if most of the dots moved coherently (e.g. 50% or 100% coherence), but became progressively more difficult as the coherence decreased.
It is investigated, how the visibility (coherence) decreases if the interfering TEM00-modes signal 1 and signal 2 of a single photon are separated within the light cone e.g. tangentially as shown on right of the figure Fig. 2 Experimental setup: For parametric down conversion a 2 mm long BBO crystal was used.
Therefore, the phase error cannot be reduced in inverse proportion to the integration time, and coherence decreases when the integration time is longer than a few tens of seconds.
Additionally, we found that with an increase in frequency, the coherence value decreased.
Negative values indicate areas where coherence decreased in the coseismic pair (I3 or I4) relative to the preseismic pair (I1 or I2).
Collagen in the media was predominantly aligned in circumferential direction (planar von Mises distribution with concentration parameter bM= 1.03±0.23), and its coherence decreased gradually from the luminal to the abluminal tissue layers (inner media, b= 1.54±0.40; outer media, b= 0.72±0.20).
Most of the curves show a similar trend – textual coherence decreases slightly with increasing cluster size.
Decreases in color coherence also resulted in slower RTs (Fig. 1e, using a regression to test if mean RT increases as loge coherence decreases (harder stimulus difficulties) as in ref. 45; average R 2, T: 0.94, O: 0.65; slope of regression: M ± SD over sessions, T: −42.1 ± 8.1 ms/loge coherence, O: −8.6 ± 4.5 ms/loge coherence.
It has also been shown that EEG coherence decreases for expert shooters as compared to novices during aiming period [ 10].
