Polygraphs have major flaws. Are there better options?

New research exposes polygraphs as 30% less accurate than a coin flip in certain real-world scenarios, driving urgent investigation into brain scans and voice analysis as superior alternatives. A 2025 meta-analysis of 47 studies found that fMRI-based lie detection achieves 85% accuracy, outperforming #2's traditional methods by 25 percentage points. Voice stress analysis, while cheaper at $50 per test, delivers only 62% reliability—better than polygraphs' 54% baseline but still 23% below the typical rival in this field. The quest for a credible replacement gains urgency as courts and employers increasingly reject outdated polygraph evidence, with some U.S. states, like California, already banning their use in hiring. This data-led shift promises to redefine truth verification, balancing precision, cost, and ethical constraints.