Informational Influence
Informational Influence exists when another human's conduct gives information about what is fact. If a friend of yours shows you that a study revealed just how bad our air quality is in Utah and how bad it is for our health, you would then be influenced to help keep the air clean. That is an example of informational Influence. You're taking the information and using it to influence your actions.
Persuasion
Persuasion is when a person's faith or attitude is persuaded by a conversation with another person. Persuasion sets in when we see commercials that are advertising products that they think will "better" our lives. We watch the infomercials and see something we like and how it's used and how much help or difference it makes the peoples lives on those commercials seem. We then are persuaded into buying those products because we want that same satisfaction in our lives. Another example of Persuasion is religion, we have missionaries go around knocking on peoples doors and then explaining to people why they should choose a specific religion rather than another due to their beliefs. Some folks get persuaded into thinking that their religion is the right one because of what was communicated between them the missionaries.
Consistency
Consistency is when a person's behaviors stay the same or persistent throughout long durations of time. When people wear the same outfits for the same day every week for months on end or they go to the gym everyday after work for years, those are examples of what consistency can be. Sometimes we have moments where we get discouraged because we realize there are inconsistencies happening in our lives and that is what is called Cognitive Dissonance. We need to be aware of the differences because if we start to feel that dissonance then it is clear we need to do what it takes to get back to the right consistency that is healthy and works for us as individuals.
References:
Schacter, Gilbert, & Wegner (2011) Introducing Psychology: First edition. Social Psychology. New York: 41 Madison Avenue
Schacter, Gilbert, & Wegner (2011) Introducing Psychology: First edition. Social Psychology. New York: 41 Madison Avenue