The reference frame

The term "reference frame" has two meanings in physics. First, there is the observational reference frame, where emphasis is on the state of one or more objects relative to the reference frame. Second we have the concept of a coordinate system, which is concerned with positions, not motion 1.

An inertial reference frame, in Newtonian mechanics is an observational reference frame in which Newton's first law is valid 2.

This is not a physics blog, however, and I intend to use the term reference frame primarily as the foundation for mental processes, in which incoming data is compared to the sum-total of past experience and is categorised in that context. For example, a child growing up in rural India will by necessity have a different set of experiences compared to a child growing up in suburban America, and by extension, their set of core values and beliefs may differ dramatically. Therefore, the two individuals may interpret the same event differently. More on this later.