Processes that require relatively little attention are ; however, processes that require relatively large amounts of attention are

The answer is automatic and controlled, respectively.

Explanation:

Automatic and controlled processes are related to the concept of automatization: this is, the amount of attention required for performing a task.

Automatic processes can be done with little to no attention, and it's possible to acquire this level of automatization for most tasks with practice and habituation. Controlled processes are usually the case for unfamiliar or very complex tasks, and probably won't allow any other activity to be performed at the same time.

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