- The CASLI Generalist Performance Exam for CDI is built around four job-task domains, not random topics.
- Domain content is drawn from CASLI's 2018 Deaf Interpreter Job Task Analysis, not the older 2000 Role Delineation Study.
- You must pass the Fundamentals of Interpreting knowledge exam before you're eligible for the performance test.
- Failed knowledge exam sections require a three-month wait before retesting.
Exam Structure Overview
Before diving into content, it helps to see where the four domains actually live inside the CDI credentialing process. RID owns the eligibility requirements, but CASLI (the Center for the Assessment of Sign Language Interpretation) writes and administers the actual tests. There are two exams a candidate must pass in sequence: the CASLI Generalist Knowledge Exam (CGKE) and the CASLI Generalist Performance Exam for CDI.
The CGKE has two parts. Fundamentals of Interpreting is a 120-item multiple-choice test - 60 questions in written English with English answer choices, and 60 in ASL with ASL answer choices, with no option to choose your preferred language. The Ethical Decision Making and Cultural Responsiveness Exam consists of 8 multi-step case studies. You must pass Fundamentals of Interpreting before you're eligible to sit the performance exam, and if you fail only one part, you retake only that part. This is where the four content domains become important: they are the organizing framework behind both the case studies and the performance exam scenarios.
The Four Content Domains
The CASLI Generalist Performance Exam for CDI, released November 16, 2020, is organized around four sequential domains that mirror the real-world lifecycle of a Deaf interpreter's assignment: Pre-Commitment Activities, Pre-Encounter Activities, The Encounter, and Post-Encounter Activities. Each domain represents a distinct phase of professional practice, and each phase carries its own decision points, ethical considerations, and skill demonstrations.
This structure isn't arbitrary - it reflects how CDIs actually work in the field, from the moment a request comes in to the follow-up after the assignment ends. If you're just starting to map out your preparation, our CDI Study Guide 2026: How to Pass on Your First Attempt walks through how to build a study plan around this exact domain sequence.
Domain 1: Pre-Commitment Activities
Everything that happens before you agree to accept an assignment.
- Evaluating your own competency and fit for the specific assignment
- Recognizing conflicts of interest before committing
- Understanding assignment logistics, setting, and consumer needs from the initial request
Domain 2: Pre-Encounter Activities
Preparation work once the assignment is accepted but before the encounter starts.
- Coordinating with a hearing interpreter partner (team preparation)
- Gathering context, terminology, and background materials
- Setting up communication access and confirming logistics with all parties
Domain 3: The Encounter
The active interpreting work itself, including all in-the-moment decision-making.
- Applying CDI-specific interpreting strategies (prosodic adjustments, visual-gestural communication, cultural mediation)
- Managing turn-taking and communication breakdowns between Deaf consumer and hearing interpreter
- Making real-time ethical decisions under pressure
Domain 4: Post-Encounter Activities
Everything that happens after the interpreting work is done.
- Debriefing with your interpreting team
- Documenting the assignment appropriately
- Engaging in self-reflection and identifying professional growth areas
Domain 1: Pre-Commitment Activities
Pre-Commitment is tested because a huge percentage of interpreting failures start before anyone ever enters the room. Candidates are expected to demonstrate sound judgment about whether they are the right interpreter for a given request - factoring in language variety, regional sign differences, the Deaf consumer's specific communication needs, and any personal or professional conflicts of interest.
Scenario items in this domain often present a request with subtle red flags: a family member on the other end, a topic outside the candidate's competency area, or insufficient information about the setting. The correct response usually isn't "accept and figure it out" - it's identifying what additional information is needed, or recognizing when declining or referring is the professional choice.
Key Takeaway
When you see a Pre-Commitment scenario on the exam, ask yourself first whether the candidate has enough information to safely commit - not whether they're skilled enough to do the job once inside it.
Domain 2: Pre-Encounter Activities
This domain is heavily about teamwork, because CDIs almost always work paired with a hearing interpreter. Exam items test whether candidates understand how to set expectations with their team partner, request or provide background materials, and establish signals or strategies for the encounter ahead of time.
Pre-Encounter also covers practical readiness: confirming the physical or virtual setup will support effective communication, understanding what materials (documents, slides, terminology lists) should be reviewed beforehand, and anticipating potential communication barriers specific to the Deaf consumer involved. Candidates who skip this domain in their studying tend to underperform on team-coordination scenarios, since these questions are less about technical skill and more about professional process.
Domain 3: The Encounter
The Encounter is the largest and most heavily weighted domain conceptually, because it covers the actual interpreting performance - the part most people associate with "being a CDI." This includes visual-gestural communication strategies, use of space and body to convey meaning, managing pace and turn-taking with a hearing interpreter partner, and real-time repair strategies when communication breaks down.
It's also the domain most connected to ethical decision-making under pressure. A consumer may not understand a concept as interpreted by the hearing partner; a rapid medical or legal exchange may require the CDI to intervene, clarify, or slow the process. Exam scenarios test whether the candidate can recognize these moments and respond appropriately rather than freezing or overstepping their role.
Domain 4: Post-Encounter Activities
Post-Encounter is frequently underestimated because it happens after the "real work" is done. But it's tested seriously: candidates need to show they understand how to debrief professionally with a team partner, document an assignment appropriately without violating confidentiality, and reflect critically on their own performance to identify growth areas.
This domain also touches on maintaining professional boundaries after an assignment ends - for example, how to handle a consumer who tries to continue a personal relationship, or how to appropriately report a concern that arose during the encounter. It's a smaller domain on paper, but scenarios here are often just as ethically nuanced as those in Domain 3.
How Domains Map to the Exam Format
It's important to understand that the four domains aren't tested as four separate labeled sections you'll see on screen. Instead, they're woven throughout both the Ethical Decision Making and Cultural Responsiveness case studies and the performance exam scenarios. A single multi-step case study might touch Pre-Commitment in its first step and shift into The Encounter by its third.
| Exam Component | Format | Domain Relationship |
|---|---|---|
| Fundamentals of Interpreting | 120 multiple-choice items (60 English, 60 ASL) | Foundational knowledge underlying all four domains |
| Ethical Decision Making & Cultural Responsiveness | 8 multi-step case studies | Scenarios often span multiple domains within one case |
| CASLI Generalist Performance Exam for CDI | Live/recorded performance tasks | Directly assesses Domains 1-4 in applied interpreting contexts |
Because domain content is layered rather than isolated, memorizing definitions won't get you far. You need to recognize which domain a scenario is testing and what the "correct" professional behavior looks like within that phase. Our CDI Exam Domains 2026: Complete Guide to All 4 Content Areas resource and the companion CDI Cheat Sheet 2026: One-Page Review of Must-Know Facts can help you keep the domain distinctions straight while you drill practice scenarios on our practice test platform.
Why Domain Mastery Matters on the Job
The four-domain structure isn't just an exam artifact - it reflects what agencies, hospitals, courts, and educational institutions actually expect from a CDI they hire. Employers evaluate whether a candidate can be trusted through an entire assignment lifecycle, not just during the visible interpreting moment.
- Legal and medical settings weigh Pre-Commitment and Pre-Encounter heavily, since conflicts of interest and preparation failures create liability
- Mental health and educational settings often emphasize The Encounter's ethical decision-making skills
- Agencies tracking repeat business care deeply about Post-Encounter professionalism, since poor debriefing or documentation damages team relationships
Understanding this connection matters beyond passing the test. If you're evaluating whether certification is worth pursuing at all, see Is the CDI Certification Worth It? Complete ROI Analysis 2026 and CDI Salary Guide 2026: Complete Earnings Analysis for context on how domain competence translates into hiring demand and pay.
Scheduling Your Domain Review
A simple way to organize review time is to dedicate focused blocks to each domain rather than studying topics randomly. This isn't about a rigid generic method - it's about matching study time to how heavily each domain shows up across both the case studies and performance exam.
Domains 1 & 2
- Review conflict-of-interest scenarios and assignment acceptance criteria
- Practice team-coordination and pre-assignment prep scenarios
Domain 3
- Drill visual-gestural communication and repair strategy scenarios
- Practice recognizing when to intervene versus stay neutral
Domain 4 & Full Review
- Review debriefing and documentation scenarios
- Run full-length mixed case studies pulling from all four domains
For a more detailed week-by-week plan covering registration timing, fees, and retake rules, pair this schedule with the full CDI Study Guide 2026: How to Pass on Your First Attempt.
FAQ
No. The domains - Pre-Commitment, Pre-Encounter, The Encounter, and Post-Encounter Activities - are woven throughout the Ethical Decision Making and Cultural Responsiveness case studies and the performance exam rather than appearing as four labeled sections.
Most candidates find The Encounter the most demanding, since it combines technical interpreting skill with real-time ethical judgment. See How Hard Is the CDI Exam? Complete Difficulty Guide 2026 for a full breakdown.
You must first pass the Fundamentals of Interpreting portion of the CGKE to become eligible for the CASLI Generalist Performance Exam for CDI; if you fail only one CGKE part, you retake only that part.
Failed knowledge exam sections require a three-month waiting period before you can retake them, and a single Fundamentals or Case Studies retake costs $140.
Check CDI Requirements 2026: Eligibility, Prerequisites & How to Qualify for the bachelor's degree/Alternative Pathway requirement and audiogram documentation needed before you can register.