An 81-year-old female with moderate Alzheimer's disease (MMSE 16/30) is brought by her caregiver who reports that the patient has been accusing him of stealing her jewelry for the past 3 weeks. She also reports seeing 'children playing in the living room' in the evenings, though no children are present. Her behavior worsens at sundown with increasing agitation. She has no psychiatric history prior to her dementia diagnosis. Medical workup including urinalysis, complete metabolic panel, thyroid function, and B12 level are within normal limits. She is not taking any new medications. The PMHNP is distinguishing dementia-related psychotic features from a primary psychotic disorder or delirium. Which assessment finding pattern most reliably supports a diagnosis of psychosis associated with Alzheimer's disease?