Final answer:
The multifactorial model of schizophrenia acknowledges that both biological and psychological factors contribute to the development of the disorder, as evidenced by studies on genotype-environment interaction and the function of dopaminergic neurons.
Step-by-step explanation:
The multifactorial model of schizophrenia suggests that a combination of both biological and psychological factors interact to cause the disorder. This model is supported by research showing that the likelihood of developing schizophrenia increases for individuals who have a genetic predisposition and who are also raised in disturbed or stressful environments. The biopsychosocial model and studies by Tienari et al. highlight the importance of understanding the genotype-environment interaction in schizophrenia spectrum disorders. Additionally, the development of schizophrenia involves neurological aspects, such as malfunctioning dopaminergic neurons and potential issues with glutamate signaling, which are treated with antipsychotic medications that block dopamine receptors.