How a maze can teach before there is a reward
A rat can learn the layout of a maze even when nothing in the maze seems worth learning it for. During unrewarded exploration, it encounters turns, dead ends, and connections between paths. The experience may not produce an obvious change in its behavior at the time, but information about the route can still accumulate.
Psychologists call this latent learning: learning that occurs but is not immediately visible in performance. When food later gives the rat a reason to reach the goal, its behavior can reveal what those earlier trips taught it.
Motivation changes what learning looks like
The key distinction is between acquiring information and showing that you can use it. A rat that wanders without food has little reason to take the most direct route, so its meandering does not prove that it has learned nothing. Once food is available, the maze becomes a problem to solve, and the animal can draw on what it has already encountered.
That makes a reward more than a teaching tool. It can also act as a signal that makes existing knowledge useful. If behavior improves after a reward appears, the improvement need not mean the reward created all the learning from scratch.
Why the distinction matters
The same idea applies beyond mazes: people often absorb details from places or situations without deliberately studying them, then use those details when a goal makes them relevant. Someone may notice which hallway leads to an office while visiting for another reason, and only later rely on that memory to find the room.
A lack of visible progress, then, is not always evidence that nothing has been learned. Sometimes the information is there; the right goal is what brings it into view.
