# Cookie Consent A/B Test Audit Report

## Audit Information

| Field | Value |
|-------|-------|
| **Organization** | CloudVault SaaS Inc. |
| **Experiment ID** | exp_2026q1_banner_layout |
| **Experiment Name** | Q1 2026 Cookie Banner Layout Test |
| **Audit Date** | 2026-03-14 |
| **Auditor** | Marta Kowalski, DPO |
| **Experiment Owner** | Lisa Chen, Product Manager |
| **Experiment Duration** | February 1 — March 14, 2026 |

## Variant Summary

| Variant | Name | Traffic | Accept Rate | Sample Size |
|---------|------|---------|-------------|-------------|
| A (Control) | Horizontal symmetric layout | 50% | 67.2% | 48,312 |
| B (Test) | Vertical stacked layout | 50% | 69.1% | 48,890 |

## Dark Pattern Assessment

### Variant A: Horizontal Symmetric Layout

| Category | Score | Finding |
|----------|-------|---------|
| Visual Asymmetry | 0/10 | Accept and reject buttons identical (240x48px, blue, 16px bold) |
| Interaction Asymmetry | 0/10 | Both require 1 click; "Reject All" on same layer as "Accept All" |
| Language Manipulation | 0/10 | "Accept All Cookies" / "Reject All Cookies" — both neutral |
| Timing/Delay | 0/10 | Both buttons render simultaneously, no delays |
| Repeated Prompting | 0/10 | Choice persisted for 180 days, no reappearance after rejection |
| **Overall Score** | **0.00** | **LOW RISK — Compliant** |

### Variant B: Vertical Stacked Layout

| Category | Score | Finding |
|----------|-------|---------|
| Visual Asymmetry | 1/10 | Both buttons same size but accept button positioned above reject (top = primary) |
| Interaction Asymmetry | 0/10 | Both require 1 click on same layer |
| Language Manipulation | 0/10 | "Accept All Cookies" / "Reject All Cookies" — both neutral |
| Timing/Delay | 0/10 | Simultaneous rendering |
| Repeated Prompting | 0/10 | Same 180-day persistence |
| **Overall Score** | **0.25** | **LOW RISK — Compliant** |

## Consent Rate Analysis

| Metric | Value |
|--------|-------|
| Accept rate spread | 1.9 percentage points |
| Statistical significance (p-value) | 0.04 |
| Red flag threshold (>20pp with asymmetry) | Not triggered |
| Uplift source | Layout change (vertical vs horizontal), not manipulation |

**Assessment:** The 1.9 percentage point difference is within normal variation for layout changes. Both variants maintain equal prominence and ease. No manipulation-driven uplift detected.

## Compliance Determination

| Criterion | Variant A | Variant B |
|-----------|-----------|-----------|
| Equal visual prominence | PASS | PASS |
| Equal interaction cost | PASS | PASS |
| Neutral language | PASS | PASS |
| No timing manipulation | PASS | PASS |
| No repeated prompting | PASS | PASS |
| No pre-selected purposes | PASS | PASS |
| No cookie wall | PASS | PASS |
| "Reject All" on first layer | PASS | PASS |
| **Overall** | **COMPLIANT** | **COMPLIANT** |

## Recommendations

1. **Proceed with experiment:** Both variants are compliant. The team may select either variant based on business metrics without privacy concern.
2. **Vertical layout note:** While Variant B scores 0.25 (negligible), monitor future iterations to ensure the top position is not exploited by making the accept button more visually prominent.
3. **Pre-launch review process:** Continue requiring DPO sign-off before deploying consent banner experiments (process established Q4 2025).

## Sign-Off

| Role | Name | Date | Decision |
|------|------|------|----------|
| DPO | Marta Kowalski | 2026-03-14 | Approved — both variants compliant |
| Product Manager | Lisa Chen | 2026-03-14 | Acknowledged compliance requirements |
| Engineering Lead | James Park | 2026-03-14 | Confirmed technical implementation |