where |·|1 denotes the L1-norm, and e d denotes the directional energy associated with the direction index d.
For forward and reverse replay content analyses, we measured the reward site bias of replay event time bins that showed strong directional preference for outbound (O) or inbound (I) track direction (direction index >0.5, where the direction index is [O-I]/[O+I]) (Singer et al., 2013).
The broad peak appears at a 2θ value of 20°-30° 20°-30°re 2c as the arrow's dinection indexed PPy.
We also design two different indexes: the Grid Index and the Direction Index, to facilitate data retrieval from the broadcast channel.
We call idea 2 fixed-Q NTF (f-NTF), and each direction is numbered with a direction index, d, ranging from 0 to D-1. Figure 2 shows block diagrams of two different solutions.
Furthermore, by dividing the number of changes of direction by the length of the axis being travelled across provides an estimate of the width of the search corridor used by participants; and finally (3) dividing participants' modal time before changing direction by the next most commonly occurring time before changing direction indexes variability in speed of searching.
where (boldsymbol {Gamma }_{text {iso}}^{[m,n]}) is the (m,n th element of the noise coherence matrix, K is the number of azimuth angles, and D m (k) is the M-dimensional anechoic ATF on microphone m from direction index k.
For each replay event, we transformed the direction index of each time bin into an index of forward or reverse content, as follows.
Also (I_{x1}), (I_{x2}), (I_{y1}), (I_{y2}) are photocurrents measured in the direction indicated by the index, which in the following experiments are called Channel A, B, C and D, respectively.
Further, orientation selectivity index (OSI) and direction discrimination index (DDI) were computed as discrimination indices for orientation and direction by correcting for the goodness of the tuning fit as suggested by Prince et al. (2002) where, RMSE is the square root of the residual variance around the means across the tuning curve.
