Table 1.

Coefficient estimates and pseudo R² values for the (A) Bitterness and (B) overall Liking regression models. Coefficient estimates are reported as the change in the square-root transformation of the response per 1 standard deviation increase (i.e., 27 min or 42 °C) in roasting time and roasting temperature, respectively.

	(A)	(B)
	Bitterness	Liking
Time	−0.02853	5.938e-02*
Temperature	−0.15290*	9.046e-02*
Time:Temperature	−0.06640*	3.763e-02*
Time2	–	−2.459e-02*
Temperature2	–	−4.309e-02*
Time: Temperature2	–	−4.382e-02*
Temperature:Time2	–	–
Pseudo R2	65.6%	62.5%

* model term is significant (p ≤ 0.05).