can you explain its dimensional approach?
The approach is influenced by personality theory, argues that full blown psychotic illness is just the most extreme end of the schizotypy spectrum.
Schizotypy
The dimensional approach, influenced by personality theory, argues that full blown psychotic illness is just the most extreme end of the schizotypy spectrum and there is a natural continuum between people with low and high levels of schizotypy. 
how does natural selection work as a mechanism of evolution A prerequisite for natural selection to result in adaptive evolution, novel traits and speciation is the presence of heritable genetic variation that results in fitness differences. what is the role of darwin in it? He defined it as the "principle by which each slight variation [of a trait], if useful, is preserved". what can you tell me about its terminology? The term is most often defined to operate on heritable traits, because these directly participate in evolution. how does the classification take place? It can act on any heritable phenotypic trait, and selective pressure can be produced by any aspect of the environment. can you tell me about the trait mentioned above? It is a distinct variant of a phenotypic characteristic of an organism. what is the role of schizotypy in it? It is an example of a psychological phenotypic trait found in schizophrenia-spectrum disorders.
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Schizotypy [SEP] Dimensional approach
The dimensional approach, influenced by personality theory, argues that full blown psychotic illness is just the most extreme end of the schizotypy spectrum and there is a natural continuum between people with low and high levels of schizotypy. This model is most closely associated with the work of Hans Eysenck, who regarded the person exhibiting the full-blown manifestations of psychosis as simply someone occupying the extreme upper end of his ‘psychoticism' dimension. Support for the dimensional model comes from the fact that high-scorers on measures of schizotypy may meet, or partially fulfill, the diagnostic criteria for schizophrenia spectrum disorders, such as schizophrenia, schizoaffective disorder, schizoid personality disorder and schizotypal personality disorder.