Factors that can influence the perceiver of a situation include

attitudes, past experiences, and expectations.

Explanation:

An observer is one who observes, pays attention to something or something, as a didactic tool leads the observer to learn or make changes. The presence of an observer is very important in any situation, because he can visualize things that will help complete tasks, thoughts and positions on a particular subject. However, an observer can also disturb a situation when he does not interpret the signals he observes correctly.

The observer needs to take care of what is influencing him, because the influences are directly related to the conclusion of the data and ideas of a situation. Factors that can influence a situation observer include attitudes, past experiences, and expectations.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.