# Development and Reliability of a Street Skateboarding Notational Analysis Framework and Application
## 3 Results
### Reliability
#### 3.2.1 Intra-Rater Reliability
\\ \cline{1-1} \cline{2-5}  & \multicolumn{2}{c}{**BA Mean Difference (frames/seconds) [95\% LoA]**} \\ \cline{2-5}  & \multicolumn{4}{c}{**(\(n\) = \# TAs) a**} \\ \cline{2-5}  & \multicolumn{2}{c}{**Intra-Rater**} & \multicolumn{2}{c}{**Inter-Rater**} \\ \cline{2-5}  & **R1\({}_{\text{1}}\)-R12 b** & **R2-R1 c** & **R3-R1** & **R3-R2** \\ \hline \multirow{3}{*}{\(\mathrm{Frame}_{\mathrm{TO}}\)} & \(-0.55\) [\(-\)6.75, 5.65] & \(-4.72\) [\(-\)10.53, 1.09] & \(-5.04\) [\(-\)9.56, \(-\)0.53] & \(-0.32\) [\(-\)5.21, 4.57] \\  & (\(n\) = 586) & (\(n\) = 489) & (\(n\) = 489) & (\(n\) = 489) \\ \multirow{3}{*}{\(\mathrm{Frame}_{\mathrm{IA-Start}}\)} & \(-0.14\) [\(-\)6.62, 6.34] & \(-3.55\) [\(-\)17.29, 10.19] & \(-3.48\) [\(-\)10.38, 3.42] & 0.07 [\(-\)14.78, 14.92] \\  & (\(n\) = 586) & (\(n\) = 489) & (\(n\) = 489) & (\(n\) = 489) \\ \multirow{3}{*}{\(\mathrm{Frame}_{\mathrm{IA-End}}\)} & \(-0.14\) [\(-\)6.75, 5.65] & 2.71 [\(-\)9.19, 14.61] & 1.52 [\(-\)6.57, 9.61] & \(-\)1.19 [\(-\)11.77, 9.39] \\  & (\(n\) = 586) & (\(n\) = 489) & (\(n\) = 489) & (\(n\) = 489) \\ \multirow{3}{*}{\(\mathrm{Frame}_{\mathrm{LD}}\)} & 0.23 [\(-\)3.79, 4.26] & 0.97 [\(-\)4.46, 6.39] & \(-0.35\) [\(-\)4.61, 3.9] & \(-\)1.32 [\(-\)6.34, 3.71] \\  & (\(n\) = 586) & (\(n\) = 489) & (\(n\) = 489) & (\(n\) = 489) \\ \hline \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{TA}}\)} & 0.01 [\(-\)0.08, 0.11] & 0.09 [\(-\)0.04, 0.23] & 0.08 [\(-\)0.03, 0.18] & \(-\)0.02 [\(-\)0.13, 0.09] \\  & (\(n\) = 586) & (\(n\) = 488) & (\(n\) = 488) & (\(n\) = 488) \\ \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{TO}}\)} & 0.01 [\(-\)0.1, 0.12] & 0 [\(-\)0.23, 0.24] & 0.03 [\(-\)0.09, 0.16] & 0.03 [\(-\)0.21, 0.27] \\  & (\(n\) = 443) & (\(n\) = 376) & (\(n\) = 376) & (\(n\) = 376) \\ \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{IA}}\)} & \(-0.01\) [\(-\)0.15, 0.14] & 0.14 [\(-\)0.12, 0.4] & 0.07 [\(-\)0.11, 0.25] & \(-\)0.07 [\(-\)0.36, 0.21] \\  & (\(n\) = 408) & (\(n\) = 355) & (\(n\) = 355) & (\(n\) = 355) \\ \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{LD}}\)} & 0.02 [\(-\)0.1, 0.13] & \(-\)0.05 [\(-\)0.2, 0.1] & \(-\)0.04 [\(-\)0.19, 0.12] & 0.02 [\(-\)0.13, 0.17] \\  & (\(n\) = 448) & (\(n\) = 378) & (\(n\) = 378) & (\(n\) = 378) \\ \hline \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{LD}}\)} & TO, take-off; IA, event/interaction; LD, landing; BA, Bland–Altman; LoA, limits of agreement. Values _include_ all coping tricks (e.g., potential redirection tricks such as axel stalls), but _exclude_ redirection tricks (e.g., kick-turns). Intra-rater reliability was assessed between two timepoints (denoted with subscript) by a single rater (R1), and inter-rater reliability was assessed between two different raters of three individuals (R2-R1, R3-R1, and R3-R2). * Number of TAs may vary across grouping and derived features due to missing data from raters and specific trick-type nuances. * Intra-rater (R1) time points (1 and 2). * Inter-rater individual raters (1, 2 and 3). R1 is the same as the intra-rater. \\ \hline \multirow{3}{*}{\(\mathrm{Time}_{\mathrm{TA}}\)} & TO, take-off; IA, event/interaction; LD, landing; BA, Bland–Altman; LoA, limits of agreement. Values _include_ all coping tricks (e.g., kick-turns), Intra-rater reliability was assessed between two timepoints (denoted with subscript) by a single rater (R1), and inter-rater reliability was assessed between two different raters of three individuals (R2-R1, R3-R1, and R3-R2)[1.48, 1.85]) than female TAs (MAD = 1.12 [0.95, 1.33]), and less consistent (BA MD [95% LoA]: male = \(-\)1 [\(-\)5.35, 3.34], female = 0.01 [\(-\)3.77, 3.79]). All frame selections were least reliable for quarterpipe/coping obstacle interactions (obst-type\({}_{\text{TO}}\), obst-type\({}_{\text{IA/TA}}\), obst-type\({}_{\text{LD}}\)). Frame\({}_{\text{IA-End}}\) selection was less reliable for grinds (MAD = 2.38) than slides (MAD = 1.43).