The only training required in our method is to con-
struct linear models that map fMRI signals to each LDM
component, and no training or fine-tuning of deep-learning
models is needed.
...
To construct models from fMRI to the components of
LDM, we used L2-regularized linear regression, and all
models were built on a per subject basis. Weights were
estimated from training data, and regularization parame-
ters were explored during the training using 5-fold cross-
validation.