Does the law of diminishing returns apply to language practice?

Question

Have there been any studies supporting the idea that the longer you practice a language each session, the less benefit you yield from it? I've always thought this was true, and thus I always tend to practice in short but frequent sessions.

My question doesn't refer to a specific language; a study supporting this effect on learners of any language is sufficient.

Answer 1

Short and frequent is good for any type of learning, the frequency which is more important than the duration. It's during the "in-between" times (diffuse mode) that your brain gets a chance to reformulate itself.

It is explained very nicely in this video

Learning how to learn | Barbara Oakley | TEDxOaklandUniversity