Casper common mistakes
Casper · Understand the traps and how to avoid them.
Answering typed Casper scenarios as a multiple-choice exercise, picking a stance and defending it instead of explicitly weighing both sides before recommending an action.
Candidates, especially those from clinical or law backgrounds, arrive trained to select the 'correct' option and treat ambiguity as a trap rather than the thing being assessed; the timed format rewards a quick verdict over visible reasoning.
What to do instead
For every response, write one sentence naming the competing legitimate interests or values, one sentence on the strongest argument for the option you did not choose, then your recommendation and a concrete first step. Practise with a two-minute timer so the structure becomes automatic; reviewers are scoring whether the trade-off is visible, not whether they agree with your choice.
Writing a general principle ('communication is key', 'I would remain professional') without stating what you would actually say or do in the next 24 hours.
Under time pressure, abstract values are faster to produce and feel safe, so candidates default to them; it also protects against committing to an action that might be judged wrong.
What to do instead
End every answer with a concrete action containing a who, what, and when: 'I would message the colleague privately before the shift ends, name the specific behaviour I observed, and ask what was behind it.' If you cannot name a concrete step, you have not finished the answer.
Ignoring the perspective of the person at the centre of the scenario (patient, client, student, customer) and analysing only the relationship between the professionals involved.
Candidates identify with the protagonist and the people they would have to confront, so the social analysis collapses into colleague-to-colleague dynamics; the affected third party is easy to forget when they are not the one sending messages.
What to do instead
Before writing, list every person in the scenario and mark who is most vulnerable or least able to advocate for themselves. Open with that person's interest, then move to the professional relationships. This ordering also makes the answer's priorities explicit to the rater.
Escalating immediately to a manager, HR, or formal complaint as the first response to a peer's minor unprofessional behaviour.
Escalation feels decisive and protects the candidate from the discomfort of a direct conversation; some candidates also believe naming a formal channel signals professionalism.
What to do instead
Apply a proportionality ladder: direct private conversation first, then a documented follow-up, then escalation when the behaviour is unsafe, repeated, or involves a power imbalance or legal duty. State the threshold you are using, e.g. 'I would go to my supervisor only if the behaviour continued after our conversation or affected a patient's safety.'
Failing to close the loop - proposing to raise a concern but never saying how you would check that the situation actually changed.
Candidates treat the conversation as the endpoint because it is the dramatic moment of the scenario; follow-up feels like administrative padding and gets cut when time runs short.
What to do instead
Add one sentence of follow-up to every answer: a check-in date, a specific observable change you would look for, or a person you would confirm with. Keep it to a single clause so it does not crowd out the reasoning.
Reading a distressed person's reaction as a personal attack or as irrationality, and responding with defensiveness or a correction of their facts rather than acknowledging their emotion.
Candidates mirror the emotional tone of the scenario and react to the surface hostility; correcting inaccurate details feels like helping and is intellectually satisfying.
What to do instead
Use a name-the-emotion-first pattern: state what the person is likely feeling and why that is reasonable given their situation, then address facts. Practise separating 'what they feel' from 'what is true' in your notes before writing.
Making assumptions about a person's identity, culture, disability, or family situation that the scenario never stated, and building the answer on those assumptions.
Candidates draw on personal experience or stereotypes to fill gaps because the prompt is deliberately sparse; filling gaps makes the answer feel more concrete and empathetic.
What to do instead
Explicitly flag uncertainty and ask: 'I would ask them how they would like this handled rather than assume.' Where you must act without information, say what you are inferring and why, and describe how you would check the inference early.
Using the answer to display knowledge of policy, ethics frameworks, or clinical guidelines instead of describing interpersonal behaviour.
High-achieving candidates over-prepare on content and import it as a credibility signal; it is also a way to avoid the harder task of committing to a relational move.
What to do instead
Cap policy references at one clause and only when it changes your action. Rewrite any sentence that could appear in a handbook into a sentence about a person: who you speak to, what you say, and how you would respond to their likely reaction.
Running out of time mid-answer, leaving the recommendation or the action step unwritten.
Candidates draft in their head, edit as they type, and spend the first half of the window on framing; the typed-response section is strictly timed and does not reward polish.
What to do instead
Write the recommendation and first action in the first two sentences, then add the trade-off and follow-up. If time is short, a short structured answer with all four elements beats a long answer that stops before the decision. Rehearse with a hard stop at 80 percent of the allotted time.
Treating the video-response section as a performance to be scripted, delivering a rehearsed or overly polished monologue that ignores the specific details of the prompt.
Candidates fear being judged on delivery and over-rehearse generic structures; the camera also pushes people toward performing confidence rather than thinking aloud.
What to do instead
Use the preparation time to note the two or three scenario-specific facts you will reference, and speak to those rather than to a template. It is acceptable to pause and think for a second on camera; raters are assessing reasoning and communication, not fluency.