Schizoid avoidant behavior

schizoid-avoidant behaviorSchizoid/avoidant behavior
The relationship between schizoid personality disorder (SPD) and avoidant personality disorder (AvPD) has been a subject of controversy for decades.wikipedia
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Schizoid personality disorder

schizoidschizoid personalitySchizoids
The relationship between schizoid personality disorder (SPD) and avoidant personality disorder (AvPD) has been a subject of controversy for decades.

Avoidant personality disorder

avoidantavoidance behaviorAvoidance
The relationship between schizoid personality disorder (SPD) and avoidant personality disorder (AvPD) has been a subject of controversy for decades.
There is also an overlap between avoidant and schizoid personality traits (see Schizoid avoidant behavior) and AvPD may have a relationship to the schizophrenia spectrum.

ANKK1

ANNK1 and addictive behaviors
Both have been associated with a shared genetic risk factor and the same polymorphism within the ANKK1 gene.

Phenotype

phenotypicphenotypesphenotypically
Today it is still unclear and remains to be seen if these two personality disorders are linked to genetically distinct, but overlapping, personality disorders or if these two personality disorders are merely two different phenotypic expressions of the same genetic disorder.

Polymorphism (biology)

polymorphismpolymorphicmorph
Both have been associated with a shared genetic risk factor and the same polymorphism within the ANKK1 gene.

Spectrum disorder

spectrumschizophrenia spectrumpsychotic spectrum
There is also some evidence that AvPD (like SPD) is a personality disorder of the schizophrenia spectrum.

Ambivalence

ambivalentambivalent emotionsambivalently
Originally, schizoid personality disorder involved social avoidance combined with marked ambivalence regarding the desirability of social contact.

Theodore Millon

Millon
Through the efforts of Theodore Millon, this complex idea was later divided across two disorders with the emergence of a separate AvPD construct and the idea of ambivalence was lost.