(A) Representative variability descriptive statistics – standard deviation (Std. Dev.), skewness, and kurtosis, Fano factor, Entropy, and Higuchi fractal dimension of string-pulling image sequence of a Black mouse. Standard deviation depicts summary of spatial variation over time (mouse posture from sitting to standing). Skewness and kurtosis capture regions of rare events around the mouse body such as position of string. Shown below each frame are the respective values of spatial entropy (SE), sharpness (S), and Hausdorff fractal dimension (HFD) separated with a hyphen. (B) same as (A) but for White mouse. The White mouse has greater yaw and pitch head motion as seen in the standard deviation. (C) Mean ± SEM cumulative distribution function (CDF) of the standard deviation values within a mask obtained for each individual mouse from their respective mean frames. For the representative Black and White mice, outline of these masks is shown in Figure 2B and D, respectively. (D–H) Same as (C) but for other parameters. (I) Mean ± SEM SE, S, and HFD shown for frames of parameters mentioned above.