According to Sternberg, a relationship in which commitment is based only on passion with the two partners not sharing any emotional connectedness is called empty love

_________, or the spontaneous speech people use as they engage in joint activities, is the main function of language, far outweighing all other forms of discourse.

Fill in the blank(s) with the appropriate word(s).

The rarest type of color deficiency occurs when individuals are unable to distinguish red from green

Indicate whether this statement is true or false.