Learning that occurs but is not observable in behavior until there is a reason to demonstrate it is called learning.

The correct answer is:

Latent learning.

Explanation:

Latent learning cannot be seen immediately, it is a type of learning that occurs without reinforcement and can only be demonstrated when the subject is in a certain situation that requires to use the skills or information learned. Latent learning can occur through experience and the subject can only realize how much he have learned until he puts all the information or skills together, latent learning can also occur unconsciously after observing a behavior or action repeatedly, so when the subject is a situation already knows what to do.

For example; someone passes through the same supermarket in the daily route to work and unconsciously observes it, when the subject needs to go shopping to a supermarket, he already knows the route. The information of where the supermarket is can only be demonstrated when the subject needs to go shopping to the supermarket and already knows where it is located.

This type of learning demonstrates that a subject is capable of learning without reinforcement

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