Internal working model of attachment
Internal working model of attachment is a psychological approach that attempts to describe the development of mental representations, specifically the worthiness of the self and expectations of others' reactions to the self. This model is a result of interactions with primary caregivers which become internalized, and is therefore an automatic process. John Bowlby implemented this model in his attachment theory in order to explain how infants act in accordance with these mental representations. It is an important aspect of general attachment theory.
Yukio Ishizuka
In 1976, while many psychiatrists continued to be preoccupied with the definition of psychological illnesses (Diagnostic Statistical Manuals), Ishizuka turned to a monograph by M. Jahoda published in 1958 entitled « Current Concepts of Positive Mental Health.» Jahoda offered six conditions for developing and evaluating future models of Positive Mental Health. In doing so, she pointed out the limits of the ‘disease’ model and set guidelines to define models of health applicable both in wellness and disease. 
Concluding that the ‘medical’ or ‘disease model’ used in psychiatry was not fit to understand healthy human beings or to assist them in ‘normal’ or optimal functioning, Ishizuka began to build such a model. His exposure to the East, and training in the West helped him develop a model of health across different cultures. Focusing almost entirely on the experience of his diverse patients, he challenged what he knew to define a model of health and personality applicable both in extreme distress and optimal health.