Table 5. Pearson’s correlation coefficient and intraclass correlation coefficient for absolute agreement for all shoulder extension measurements.   Correlation Absolute Agreement PCC Interpretation Sig. (p=) ICC for Absolute Agreement Interpretation Sig. (p=) RPIn v PPIn 0.074 Negligible 0.769 0.120 Poor 0.387 RPMax v PPMax 0.519 Moderate 0.027 0.689 Moderate 0.012 “PCC” refers to Pearson’s correlation coefficient, “Sig.” refers to significance, “ICC” refers to intraclass correlation, “RPIn v PPIn” refers to comparing researcher perception of initial tension in a stretch with participant perception of initial sensation of stretch, “RPMax v PPMax” refers to comparing researcher perception of maximum tension in a stretch with participant perception of maximum tolerable stretch. Intraclass correlation coefficients are for absolute agreement using average measures and a two-way random effects model. Significance considered at p ≤ 0.05.