bipolarity
n. a construct of mutual exclusion and, by implication, a strong negative correlation between opposite dimensions. It typically is applied to affect or mood (e.g., happiness vs. sadness; enjoyment vs. irritation), but it also may be used to describe individual differences (e.g., introversion vs. extraversion). In contrast, the concept of unidimensionality is characterized by variation of a single attribute, such as a greater or lesser degree of pleasure.