| best.rsa | Compare a list of polynomial models against the data | 
| best.rsa2 | Compare two polynomial models against the data | 
| exportRSA.bootstrap | Export bootstrapped parameters of polynomial model | 
| exportRSA.fit | Export fit indices and names of polynomials models | 
| ident.ext | Probe extrema in the response surface | 
| plotting.ext | Plot extrema in the response surface along the lines of congruence and incongruence | 
| plotting.rsa | Plots the response surface of a polynomial model of first, second, or third degree | 
| plotting.rsaCOEF | Plots the response surface of a polynomial model of first, second, or third degree | 
| RSAmodel | Estimate polynomial models for response surface analysis | 
| RSAmodel.auxiliary | Estimate a list of polynomial models for RSA, using auxiliary variables in FIML | 
| RSA_step1 | Simulation data on needs-supplies fit processes (STEP1) | 
| sim_NSfit | Simulation data on needs-supplies fit processes (illustration) |