- How the Two CDPA Content Areas Are Organized
- What Is and Is Not Published About the Blueprint
- Domain 1: How to Design for Persuasion, Emotion, and Trust
- Domain 2: The PET Architect
- The Influence Toolkit You Must Already Know
- Exam Format, Fees, and Retake Mechanics
- Scheduling Your Prep Around the Two Areas
- Where These Skills Show Up on the Job
- Frequently Asked Questions
- The Certified Digital Persuasion Analyst credential from HFI is organized around two courses: PET Design and The PET Architect.
- The two domains are unweighted preparation categories; no official weighted blueprint has been verified.
- The published assessment mixes multiple-choice with application/essay questions, with at least 70% required on multiple choice.
- The Architect course assumes you can already apply the PET Design persuasion tools, so study Domain 1 first.
How the Two CDPA Content Areas Are Organized
The Certified Digital Persuasion Analyst (CDPA) credential is issued through Human Factors International (HFI) and its training arm, HFI Training. Unlike many professional certifications that publish a multi-domain blueprint with percentage weights, the CDPA is tied to two specific HFI courses. Those two courses give candidates a clean way to divide their preparation:
- Domain 1: How to Design for Persuasion, Emotion, and Trust (PET Design)
- Domain 2: The PET Architect
That is the full list. If you came looking for six or eight content areas, you will not find them here, and it is worth being skeptical of any resource that claims a longer official list. The title of this guide refers to "2 content areas" because that is what the issuer-linked course structure supports. For a broader orientation to the credential itself, see What Is CDPA Certification? and CDPA Certification.
What Is and Is Not Published About the Blueprint
Honest preparation starts with knowing where the public information stops. The issuer-served Analyst certification page and the CDPA page explicitly name the Certified Digital Persuasion Analyst and link its assessment to the PET Design and PET Architect courses. Beyond that, several details are not publicly disclosed or could not be verified:
| Item | Status |
|---|---|
| Official weighted domain percentages | Not verified; no weighted blueprint found |
| Exact question count | Not publicly disclosed |
| Multiple-choice vs. essay split | Not publicly disclosed |
| Scored vs. unscored items | Not publicly disclosed |
| Numerical essay rubric | Not verified |
| Pass rate | Not publicly disclosed |
| Open-book, calculator, adaptive rules | Not verified |
| Certification validity, renewal fee, CEU/CPE | Not publicly verified for the CDPA specifically |
One naming wrinkle deserves a mention. Other HFI program materials use the title Certified Digital Persuasion Architect. No formal renaming date, and no exact equivalence between the current examination and the Analyst-labeled one, has been established. If you are buying or scheduling, confirm directly with HFI which label and exam version your purchase covers. For more on how hard candidates find the assessment, see How Hard Is the CDPA Exam? and the discussion of CDPA pass rate data.
Domain 1: How to Design for Persuasion, Emotion, and Trust
PET Design is the foundation. HFI's published learning outcomes for this course describe a practical, design-centered skill set rather than a purely theoretical one. Candidates are expected to be able to analyze existing digital experiences and also to build persuasive ones. The published outcomes include:
PET Design: Published Learning Outcomes
The course outcomes, as published by HFI, break down into these capabilities:
- Apply core methods and tools for persuasive and emotional design, including creating a persuasion strategy
- Evaluate sites on the basis of persuasion, emotion, and trust
- Use PET Design markers to identify persuasion, emotion, or trust design elements in your own prototypes or designs
- Integrate PET-related requirements into data gathering and interaction design
- Build personas specifically to research, probe, and analyze PET-related factors
- Construct designs and persuasion flows based on users' drives and blocks
- Validate the persuasiveness and emotional impact of designs
- Leverage the research that continues to shape this rapidly evolving discipline
Evaluating versus building
Notice the two modes embedded in those outcomes. Several are evaluative: evaluate sites, identify markers, validate impact. Others are constructive: create a strategy, build personas, construct persuasion flows. A candidate who has only practiced one mode will be exposed by application-style questions. If your background is UX research, drill the construction side. If you come from marketing or conversion work, drill the evaluation and validation side.
Drives and blocks
The phrase "users' drives and blocks" is central. A persuasion flow is not a sequence of screens; it is a path that matches what motivates a user (drives) against what holds them back (blocks). When you study sample sites or scenarios, practice naming the drive being engaged, the block being addressed, and the PET marker that signals it. That habit maps directly onto the kind of application reasoning the published assessment describes.
Personas with a PET purpose
A standard persona captures demographics and goals. A PET persona is built to probe persuasion, emotion, and trust factors specifically. Expect to reason about what such a persona would need to contain, and how PET requirements enter data gathering and interaction design from the start rather than being bolted on at the end.
Domain 2: The PET Architect
Where Domain 1 trains you to analyze and design, Domain 2 scales the thinking up to strategy and orchestration. The published outcomes for The PET Architect emphasize the criticality of PET Design in market strategies, product innovation, and application design, and then introduce a more structured vocabulary.
The Core PET Meme
A central construct in this domain. HFI describes the Core PET Meme as something that is:
- Tuned with executive intention
- Tuned with deep PET analysis insights
- Practical to transmit
- Protected from maladaptation
Candidates also work on creating a projection of a Core Meme, which can be a phrase, a behavior, or an image.
The Persuasion Flow
The Architect course centers the persuasion flow on the Core PET Meme. The published outcomes describe these elements:
- Select effective, synergistic, and practical methods
- Create core chains through an interaction
- Ensure momentum
- Ensure final conversion
- Embellish with triggers
Retention and Sustained Relationships
The course goes beyond the initial conversion to cover building in customer retention methods, including:
- Pain control
- Habit
- Engagement and commitment
Where architecture gets applied
The published outcomes name three application areas for PET Architecture methods: market strategies, new product and service innovations, and application and website designs. When practicing, vary your scenarios across all three. A question about a subscription product's retention loop calls on different instincts than a question about a landing page's conversion chain, even though the underlying framework is shared.
The Influence Toolkit You Must Already Know
This is the most important cross-domain detail. HFI's recommended prior knowledge for The PET Architect states that participants must be able to apply the persuasion engineering tools from the PET Design course. The listed tools and concepts are:
| Group | Concepts from the published list |
|---|---|
| Pricing and value perception | Contrast principle; High price equals good; The power of free; Divestiture aversion |
| Social influence | Social proof; Social learning; The power of people we like; Pressure by people we like; Diffusion of responsibility; Obedience to authority |
| Decision and perception biases | Decidophobia; Over categorization and correlation; Overestimation of big unlikely events; Expectation; Priming and framing |
| Commitment and consistency | Momentum of "Yes"; Compliance laddering; Cognitive dissonance; Rule of reciprocation; Reason for request |
| Motivation and response | Scarcity; Psychological reactance; Feel good; Conditioning and association |
The grouping above is an editorial study aid; the underlying concepts are the published list. Know each by name, know the mechanism, and be able to recognize it in a described interface or campaign. Pay particular attention to pairs that interact: scarcity can trigger psychological reactance if applied clumsily, and compliance laddering depends on the momentum of "yes." Questions that test tension between two tools are a natural fit for essay-style application items. A compact review of these terms belongs on your CDPA cheat sheet.
Exam Format, Fees, and Retake Mechanics
HFI administers the online exam. A separate platform or proctoring vendor is not publicly named, and current proctoring rules have not been verified. What can be said, with the appropriate caveats about legacy versus current terms:
- Format: The published assessment includes multiple-choice and application/essay questions. It cannot be treated as a multiple-choice-only credential.
- Passing logic: The issuer-controlled badge requires at least 70% on the multiple-choice portion plus passing essays. No numerical essay rubric or current aggregate formula was verified. See CDPA Passing Score for the latest on this.
- Legacy exam-only terms: The older Analyst exam-only page describes 90 minutes within a scheduled 24-hour access window, no prerequisites, USD 475, and one free retake within six months. Current 2026 exam-only checkout pricing is unconfirmed.
- Training package: The current North American Architect package is listed at USD 3,290 for five days and 40 hours, covering two courses, materials, the examination, and one reattempt within six months. No member/non-member price split is published.
Scheduling Your Prep Around the Two Areas
Because the Architect course builds on PET Design, the sequencing is not arbitrary. Here is a sample arrangement that respects the dependency between the domains. Adjust the length to your own calendar and background; for a fuller methodology, see the CDPA Study Guide.
Domain 1: Influence Tools
- Learn every concept in the prior-tools list by name and mechanism
- Practice spotting each in real sites and campaigns
Domain 1: Methods and Validation
- Work through persuasion strategy, PET markers, and drives and blocks
- Sketch PET personas and evaluate sites for persuasion, emotion, and trust
Domain 2: Meme and Flow
- Define Core PET Memes against the four published criteria
- Draft persuasion flows with core chains, momentum, conversion, and triggers
Domain 2: Retention, Then Mixed Practice
- Cover pain control, habit, engagement, and commitment
- Take mixed practice sets and write timed application answers, since essays are part of the published assessment
Practice questions on this site are allocated across the two areas editorially, not by an official weighting, so treat your own weak spots as the guide for how to rebalance. Our main practice test site lets you target each area separately.
Where These Skills Show Up on the Job
PET skills are used wherever digital experiences need to move people to act while keeping their trust. Typical contexts include UX and interaction design teams, conversion and growth roles, product management, and marketing strategy. The Architect course's three named application areas (market strategies, product and service innovations, and application and website designs) are a reasonable guide to the kinds of work the training addresses. For job-market perspective, see CDPA Jobs, and for compensation context, the CDPA Salary Guide. Whether the investment makes sense for you is covered in Is the CDPA Certification Worth It?. Those considering formal coursework can read about CDPA training.
Key Takeaway
Treat the two domains as a dependency chain, not two parallel silos. Master the PET Design toolkit and its evaluation habits first, then use them as raw material for Core PET Memes, persuasion flows, and retention design in the Architect domain. Rehearse written application answers, since essays are part of the published assessment.
If you are still getting oriented on the terminology, What Is CDPA? and What Does CDPA Stand For? are good starting points, and you can test your readiness on the CDPA Exam Prep practice tests.
Frequently Asked Questions
This guide organizes preparation into two areas that mirror the two HFI courses linked to the Certified Digital Persuasion Analyst: PET Design and The PET Architect. They are unweighted preparation categories, not official weighted exam domains, and no official weighted blueprint has been verified.
Unknown. No weighted blueprint has been published or verified, so no domain can be identified as highest-weighted. Prepare for both, and use the fact that the Architect course builds on PET Design to decide study order.
No. The published assessment includes multiple-choice and application/essay questions. The issuer-controlled badge requires at least 70% on multiple choice plus passing essays. The exact question count and the numerical split are not publicly disclosed.
The legacy Analyst exam-only page lists USD 475 with one free retake within six months, but current 2026 exam-only pricing is unconfirmed. The current North American Architect package is listed at USD 3,290 and includes training, the examination, and one reattempt within six months. Verify with HFI before purchasing.
The legacy exam-only page lists no prerequisites, and the 40 training hours in the package are not a universal prerequisite. No mandatory degree, experience hours, or references were verified. That said, the Architect course expects you to already apply the PET Design tools, so the material itself is hard to skip.