In Linear Discriminant Analysis (LDA), it is assumed that the features are ….. in each class.

Which function is used in logistic regression to restrict predictions between 0 and 1?

A 25-year-old man survives a motor vehicle accident. For the past 48 hours, he has had nightmares, feels hypervigilant, and avoids reminders of the crash. He has no past psychiatric history. Which of the following best describes the diagnostic status of his symptoms?

A 24-year-old man presents with mood swings every 2-3 weeks over the past 15 months. He describes periods lasting about 2 days of feeling “energized,” sleeping less, and spending impulsively, followed by episodes of low mood, fatigue, and withdrawal for a few days. He cannot recall if these episodes caused significant impairment, and no episode has clearly met full criteria for mania or major depression. There is no history of psychosis, hospitalization, or suicidal ideation. Based on this presentation, which of the following is the most appropriate diagnosis?

Signs of readiness to begin the planning process include:

A 38-year-old man is brought to the clinic by his wife for unusual behavior. He is disoriented, provides only approximate answers to questions, and reports hallucinations, blackouts, and memory lapses without coherent explanations. For example, when asked his age, he replies, “I’m not 10.” There is no evidence of neurological disease or substance use. What is the most likely diagnosis?

A 9-year-old child with a history of extensive trauma, including physical abuse and witnessing domestic violence, continues to show some PTSD symptoms and peer difficulties. Despite these challenges, the child demonstrates determination and a positive outlook in working to overcome adversity. What is the most appropriate action for the PMHNP?

Adoptive parents of a 5 year old male who has a history of five past foster home placements bring the child to an initial psychiatric interview with chief concern of oppositional behaviors. To determine attachment issues, the clinician should ask

A 32 year-old graduate student accompanied by her husband is seen in the clinic with concerns about having ADHD. She reports feeling “hyper” the past four or five days. She has been staying up studying until 3 or 4 a.m. and gets up by 7 a.m. to get ready for class. She reports being easily distracted, and finds it is difficult to maintain focus. She is afraid she will not be able to keep up with the semester expectations. Discussing this with her husband, this is a pattern over the past several years that he has noticed three or four times a year, and after several weeks of the frenetic pace, she sleeps 10 to 12 hours a night, complains of no energy, lacks motivation, stops engaging with him and tends not to eat. Her presentation is most consistent with

A 29-year-old woman reports alternating episodes of elevated and depressed mood over the past year. She describes episodes in the last 12 months where she felt euphoric, talked rapidly, needed only 3–4 hours of sleep, and spent impulsively. Each of these periods lasted about 5 days and were followed by episodes of low mood, anhedonia, hypersomnia, and feelings of worthlessness lasting 2 to 3 weeks. She denies hallucinations, delusions, or history of full manic episodes. She is currently not on treatment. What is the most appropriate diagnosis?