Answer:
the tendency to comply with a large request if one has previously complied with a small request.
Explanation:
Foot in the door
This approach simple states that by asking for something that is easy, than moving to something harder, you will receive a "yes" for both. This simply means that we as individuals tend to agree to a larger request more readily if we have already agreed to a small request.
Foot in the door technique has the ability to cause cognitive disparitiy due to the fact that if an individual has changed their views on helping, they would experience disparitiy or dissonance if they did not help again.
That is even after first replying "yes" to a simple request that anyone would do, the person begins to feel helpful and therefore want to help again once you ask for something harder.