Table 1:

Regression model classes based on functional vs. scalar response variables and for longitudinal (repeated-measures) vs. cross-sectional data. We use “functional mixed models” as a short-hand for function-on-scalar mixed models. We use “functional regression” as a short-hand for single level function-on-scalar regression.

	Longitudinal	Cross-Sectional
Functional	Functional Mixed Mod	Functional Regression
Scalar	Generalized Linear Mixed-Effects (GLMM)	Generalized Linear Models (GLM)