Answer:There are different reference groups that has an influence on an individual purchasing decisions these are primary groups, secondary groups ,aspirational groups and dissociative groups.
Explanation:
Primary groups
These are the closest people to you it could be your family,closest friends or room mates.
These are the people you want to impress when you do the purchase so their opinions , feelings and views matters a lot in determining your decision to buy a particular product.
They will openly share their honest opinions and will help you in making a wise decision to buy a particular product, they will give you the confident you need in making a decision to purchase that product.
Secondary groups
These are the people you have professional relationships with such as your colleagues or your superiors.
This group doesn't have much influence on your decision because they can not openly share their opinion with you due to the level of the relationship you have with them which isn't too close.
Aspirational group
This is a group of people that you desire to look like , for example you will imitate how they dress up which will influence you to buying clothes that are similar to their clothes.
Dissociative group
This is the group that you don't want to look like as a result you will stay away from buying things that will make you look like them for example you will not buy clothes that they wear.
