One of Marxism's fundamental and most urgent tasks is to construct a genuinely objective psychology, which means a 
psychology based on sociological, not physiological or biological... This is a task which neither biology or physiology is equipped to cope with: The conscious psyche is a socioideological
fact...The process that basically define the content of the psyche occur not inside but outside the individual organism, 
although they involve its participation (25).
The only possible way of bringing the Marxist sociological method to bear on all the profundities and subtleties 
of "immanent" ideological structures is to operate from the basis of the philosophy of language as the philosophy of the 
ideological sign. And that basis must be devised and elaborated by Marxism itself (15).
"That which has been termed "social psychology" and is considered...by the majority of Marxists, as the transitional 
link between the socipolitical order and ideology...is, in its actual, material
 existence, verbal interaction. Removed from
  this actual process of verbal communication and interaction,...social psychology would assume the guise
  of a metaphysical or mythic concept- "the collective soul" or "collective inner psyche," the "spirit of the people," etc. (19)