The Assessment
Product
The Icosa assessment turns your responses into a complete 20-center personality profile — two engines ranging from direct measurement to adaptive convergent depth, behavioral intelligence captured while you answer, and a structural output rich enough to ground every feature in the system.
One Grid, Two Engines
The Icosa assessment maps your personality across a 4x5 grid: four Capacities (Open, Focus, Bond, Move) by five Domains (Physical, Emotional, Mental, Relational, Spiritual). That grid produces twenty harmony values capturing how you process, engage with, and express life. Every engine generates the same structural output — a complete 20-center profile with coherence band, gateway identification, trap detection, and formation classification.
What changes between engines is precision. ICOSA-D40 takes a direct measurement of each center. ICOSA-C135 triangulates every position from multiple angles. Both capture the same subject — your living personality architecture — at different levels of resolution.
| Engine | Items | Time | Confidence | Best For |
|---|---|---|---|---|
| ICOSA-D40 | 40 | ~8 min | 0.85 | Solid baseline, retake tracking, most users |
| ICOSA-C135 | ~135 (adaptive) | ~20 min | 1.00 | Complex cases, clinical intake, full triangulation |
The confidence number is not a quality judgment. It is a measurement precision indicator that flows through every computation in your profile. An ICOSA-D40 assessment at 0.85 confidence produces a real, mathematically valid profile — it simply carries slightly wider uncertainty margins on fine-grained features. The engine knows what it knows and what it is estimating, and it communicates that distinction clearly. Across both engines, longitudinal reliability is ICC(2,k) = 1.00 — profiles from different engines track across time on the same scale, without correction factors.
How Each Engine Works
ICOSA-D40: Direct Measurement
Forty items using a split direction-and-magnitude format across 20 harmony cells, plus domain splits, dynamics, and seed/need/stress questions. ICOSA-D40 is the default for most users. At 0.85 confidence, it provides a solid baseline that is precise enough for meaningful trend tracking across retakes. If your coherence moves from Strained to Steady between two ICOSA-D40 assessments, that shift reflects real structural change — the measurement is sensitive enough to detect it.
The profile you get back is a real Icosa profile with all the same constructs (coherence, gateways, traps, formations) computed from genuinely measured data. It is the right choice when you want a fast orientation, a screening check, a solid baseline, or regular retake tracking.
ICOSA-C135: Adaptive Convergent
Approximately 135 items, selected adaptively through convergent targeting. ICOSA-C135 identifies which grid positions carry the most diagnostic uncertainty and concentrates questions there. It uses 3-way majority voting for noise resilience, so outlier responses don’t pull the profile off-center. The engine triangulates every center from three angles — under-functioning, centered, and over-functioning — catching asymmetries that a single split-format response would average away.
7-point Likert scales capture fine-grained intensity with seven gradations, giving the engine a high-resolution read on absolute magnitude at each grid position.
Differential items present multiple-choice scenarios that disambiguate similar-looking patterns. When two grid positions could explain the same surface behavior, a differential item forces a choice that reveals which position is actually active.
Seed/need items identify both where a pattern originates and which direction it is moving — crucial for distinguishing between someone who is naturally Open and someone who is learning to be. A settled trait and a developmental edge look different in the data, and seed/need items capture that difference.
At 1.00 confidence, ICOSA-C135 produces the highest-resolution profile the system can generate. Every computation runs at full precision. Every behavioral signal is captured at maximum fidelity. ICOSA-C135 is the engine clinicians use for complex intake assessments and researchers use for study protocols.
Who Is Answering?
The same assessment can be taken from four different perspectives, and the system treats each one as a distinct data source.
Self is you answering about yourself — the default perspective. Your self-perception is valuable because only you have access to your inner experience, but it also carries the blind spots that come with proximity.
Other/Partner is someone answering about you. A partner, close friend, family member, or colleague sees your behavior from the outside. They miss your internal experience but catch patterns you cannot see from inside them.
Clinician is a trained professional observing you through clinical vocabulary. The assessment reframes questions in the third person with clinical precision, and the resulting profile carries the weight of professional observation.
Consensus is not a fifth perspective but a computed aggregate. When multiple reporters have assessed the same person, the system generates a weighted composite using weighted multi-perspective integration — combining self-report, other-report, and clinical observation into a single profile that leverages each source’s strengths while compensating for each source’s limitations.
What Happens While You Answer
The assessment does not simply record your answers. It observes how you answer. Twenty-three behavioral signals across five categories are detected during the assessment process itself.
Timing signals track response latency, hesitation patterns, and pacing. A question you answer in 800 milliseconds tells the system something different from one you deliberate on for twelve seconds — not about correctness, but about certainty and familiarity.
Trajectory signals detect patterns of change across the assessment. Are your responses becoming more extreme as you go? More moderate? More consistent? These trajectories reveal engagement quality and response style.
Sequential signals analyze the relationship between consecutive answers. Sudden reversals, consistent streaks, and oscillating patterns each carry distinct meaning about how you are processing the questions.
These behavioral signals do not replace your answers. They overlay additional information that refines the profile, particularly in areas where your stated responses and your response behavior diverge. A person who rates themselves as calm (stated) but hesitates on every emotion-related question (behavioral) generates a richer, more accurate profile than either data source alone.
How Behavioral Signals Affect Your Profile
Behavioral signals operate as overlays, not overrides. Your direct answers always form the foundation of your profile. Behavioral data adjusts the confidence and interpretation of specific grid positions based on observable patterns.
If you answer questions about the Emotional domain quickly and consistently but slow down significantly on Relational domain questions, the system increases its confidence in your Emotional values (you seem clear on those) while noting that your Relational values may carry more uncertainty (you seem less settled there). The signals refine the picture — they never replace it.
The amount of behavioral adjustment is engine-dependent. ICOSA-D40 at 0.85 confidence produces moderate behavioral data. ICOSA-C135 generates the richest behavioral data because its larger item set provides ample space for patterns to emerge.
Behavioral Signal Categories
| Category | Signals | What They Detect |
|---|---|---|
| Timing | 5 | Response latency, hesitation clusters, pacing consistency, domain-specific timing, acceleration/deceleration |
| Trajectory | 5 | Extremity drift, moderation drift, consistency trends, engagement curves, fatigue signatures |
| Motor | 4 | Slider precision, click patterns, scroll behavior, revision frequency |
| Sequential | 4 | Reversal rate, streak patterns, response cycling, adjacency effects |
| Session | 5 | Overall duration, break patterns, completion momentum, abandonment risk, re-engagement quality |
Save, Resume, and Return
Life interrupts. The assessment saves your progress automatically as you go, with debounced auto-save to both your browser and the server. Close your laptop mid-question, and when you return your answers are exactly where you left them.
This is not just convenience — it preserves behavioral data integrity. The system distinguishes between a natural pause (you walked away to answer the door) and a genuine hesitation (you could not decide between two options). Interrupted sessions resume cleanly without contaminating the behavioral signal layer.
Free to Start
The full assessment is available on the free tier. There is no paywall between you and your first profile. ICOSA-D40 is accessible without a subscription; ICOSA-C135 is available on paid plans.
What requires a subscription is the deeper analysis: AI-generated narratives, longitudinal timeline tracking, centering plans, dyadic compatibility assessments, and framework comparisons. But the core assessment, the computation of your 20-center grid profile with coherence band and formation classification, is free. You see your full structural picture before deciding whether you want the interpretive layers built on top of it.
What You Get Back
Regardless of which engine you use, the assessment produces a complete structural profile: 20 harmony values, capacity and domain summaries, a coherence band classification, gateway identification, trap detection, basin detection, fault line analysis, pattern matching, dynamics computation, and formation classification. Over 300 computed metrics from a single sitting.
Every question in the assessment is structurally anchored to the 4x5 grid architecture — not selected from a generic item pool. The two engines do not measure different things. They measure the same twenty centers with increasing resolution, and every piece of your structural profile is grounded in data you provided. The result is a personality portrait that is yours from the first question to the last metric.