Materialism in psychology refers to a philosophical position that everything, including mental events, is composed of physical matter and is thus subject to the laws of physics. Materialism is also used to describe a value system that places a high priority on making a lot of money and having many possessions, as well as on image and popularity, which are almost always expressed via money and possessions. Here are some key points about materialism in psychology:

• Philosophical Materialism: This is the view that everything in existence is composed of physical matter and is therefore subject to the laws of physics.

• Value System Materialism: This is the view that places a high priority on making a lot of money and having many possessions, as well as on image and popularity, which are almost always expressed via money and possessions.

Research has shown that materialism is associated with lower levels of well-being, less pro-social interpersonal behavior, more ecologically destructive behavior, and worse academic outcomes. Materialism is also associated with treating others in more competitive, manipulative, and selfish ways, as well as with being less empathetic. However, it is important to note that materialism is not the same as compulsive consumption, which is when a person feels unable to control their spending.

In summary, materialism in psychology can refer to a philosophical position that everything is composed of physical matter or a value system that places a high priority on making a lot of money and having many possessions. Materialism is associated with negative outcomes such as lower levels of well-being and less pro-social behavior.