Complex sentence: Some studies have also found that self-recognition of schizophrenic patients with auditory hallucinations was impaired, meaning that they could not recognise the hallucinations as a product of their own mind.
Split into simpler sentences: Some studies have also found that self-recognition of schizophrenic patients with auditory hallucinations was impaired. Meaning that they could not recognise the hallucinations as a product of their own mind.