Priya, a 21-year-old junior who is normally described by friends as reserved and methodical, has seemed unusually different for the past ten days. Her roommate reports Priya has been sleeping only about two hours a night but insists she feels "more energized than ever" rather than tired. She has started three separate new creative projects simultaneously, speaks so quickly and jumps between topics so fast that friends have trouble following her, and yesterday used most of her semester's savings to book a spontaneous trip, telling friends she has "never felt this unstoppable." She denies using any drugs or alcohol during this period, and a friend who saw her over the weekend said she seemed irritable and snapped at a classmate over a minor disagreement, which is out of character for her. Her class attendance has dropped because she says the lectures "move too slowly" for her right now. Nothing unusual was happening in her life ten days ago that would obviously explain the sudden shift.
Step 1
Read Presenting Info
Read the presenting information above carefully, then continue when ready.
Step 2
Identify Salient Features
Select the features from this vignette that are most diagnostically salient.
Step 3
Identify Possible Families
Which disorder families should be considered as possible explanations for this presentation?
Step 4
Select Relevant Evidence
Select the pieces of evidence that most directly support the leading formulation.
Step 5
Consider Competing Explanations
Select the explanations that are legitimate competing possibilities worth weighing, even if ultimately less supported.
Step 6
Choose Best Formulation
Which formulation is best supported by the full pattern of evidence?
Step 7
Explain Reasoning
In 2-4 sentences, explain which evidence most strongly supports your formulation and why you ruled out the alternatives. Use hedged, professional language.
Step 8
Review Expert Explanation
Compare your reasoning to the expert explanation below.
Expert reasoning
This vignette describes a pattern most consistent with a manic episode within Bipolar I Disorder: a sustained (about ten days), marked, and clearly noticeable change from Priya's usual reserved baseline, involving decreased need for sleep without fatigue, rapid pressured speech, multiple simultaneous ambitious projects, uncharacteristic irritability, and a high-risk impulsive financial decision -- with real consequences and impairment (reduced class attendance, strained relationships). Because stimulant use can produce a very similar picture, a careful formulation would still want to actively rule out a substance-induced cause through history and, ideally, toxicology, even though she denies use here. The absence of any delusions, hallucinations, or disorganized speech argues against a primary psychotic disorder. It would be a mistake to dismiss this pattern as simply "enthusiasm" or "high achievement drive" -- the severity, sustained multi-day duration, and real functional consequences distinguish this from ordinary positive mood or motivation. Any real clinical conclusion would require a fuller history, including whether this represents a first episode or a recurrence.