Table S8. Final standard error of measurements (SEM).

SEM type	Equation	Equals
SEM intra	√(σ2 error)	0.15
SEM inter, fixed effects	√(σ2 error + σ2 S × O)	0.15
SEM inter, random effects	√(σ2 error + σ2 observer + σ2S × O)	0.27