The ideal is to use generalized social reinforcement, but initially, other reinforcers can be used to engage the child in training.

It necessarily needs to be a food reinforcer, as no child can make the ecoic with only social reinforcement.

It necessarily needs to be a social reinforcer, as no child can make the ecoic with only food reinforcement.

The reinforcer used in ecoic training does not influence the effectiveness of the training.