Final answer:
During a psychiatric admission, a nurse should collect objective data on the client's emotional state and mental status using a biopsychosocial approach, without including subjective opinions.
Step-by-step explanation:
The admission for a psychiatric nurse conducting an nursing history on a new client should include data addressing the client's emotional state, utilizing a biopsychosocial approach including family system assessment, and specific data detailing the client's mental status. The nurse's subjective opinion about the client's mental and emotional status should not be included as it is not objective data. Instead, the nurse should focus on gathering factual information regarding the client's current and past health history, including any psychological, biological, and social factors that could affect the client's mental health.