Average root-mean-square errors (RMSE) of the posterior means of the main-effects $β$⁠, intercepts $β0$⁠, and deeper tensor arms $η$ versus sample size $n=250⋅i$ for $i∈{1,2,…,8}$⁠. The median, 25% quantile, and 75% quantile based on the 50 independent simulation replications are shown by the circle, lower bar, and upper bar, respectively.