Ambivalence refers to mixed positive and negative feelings or simultaneous attraction and repulsion.
Ambivalence also refer to positive and negative Values that often exist simultaneously; can refer to uncertainty about taking a particular direction or frequent vacillation between two (2) different perspectives or courses of action ; one of the “four A’s” used to identify the Splitting of the external reality in schizophrenia. (see Eugen Bleuler)
The other "A's are: Affect, Autism and (loosening of) Associations.
List of books: Ambivalence