Online apps for statistical analysis
Test for u-shaped (or inverted u-shaped) relationships using the two-lines procedure (Simonsohn, 2018). Upload data, specify a regression model, and get a publication-ready figure.
Open two-lines testProbe interactions with GAM simple slopes and Johnson-Neyman curves. Upload data, select focal predictor, moderator, and outcome, then run interprobe from the R package statuser.