NOS is a fuzzy construct; it is neither universal nor stable. There are many attempts to define NOS; for example, McComas, Clough, and Almazroa (1998) provide an overall description of NOS as:
NOS is a fuzzy construct; it is neither universal nor stable. There are many attempts to define NOS; for example, McComas, Clough, and Almazroa (1998) provide an overall description of NOS as: