> ## Documentation Index > Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt > Use this file to discover all available pages before exploring further. # Page Load to First Interaction, FullStory > Page Load to First Interaction for FullStory stores. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it. **Card class:** [Non-Hero](/nerve-centre/overview#card-classes-explained) • **Category:** [Page Analysis](/nerve-centre/connectors#connectors-by-type) ## At a glance > **Page Load to First Interaction** measures how long a visitor waits, from the page beginning to load, before they take their first action on it. FullStory captures this from the session timeline. It is a real-world responsiveness measure: not a synthetic lab score but the actual lag your visitors felt before they could engage. A rising value means pages feel sluggish, and sluggish pages quietly shed engagement and conversion well before anyone files a complaint. | | | | --------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **What it counts** | The typical elapsed time between page load starting and the visitor's first interaction, captured by FullStory across sessions in the period. | | **Sample type** | Backend API data from FullStory, refreshed on the standard data refresh. | | **Why it matters** | It is felt responsiveness, the delay real visitors experienced before they could act. Slow first interaction correlates with higher bounce and lower conversion. | | **Reading the value** | Compare the current period to the prior period. A rising time points to heavier pages, slower scripts, or render-blocking resources. | | **Currency** | count | | **Time window** | `30D vsP` | | **Alert trigger** | `-` | | **Sentiment key** | `fs_page_load_to_first_interaction` | | **Roles** | owner, marketing | ## Calculation Calculated automatically from your FullStory data. Vortex IQ reads the interval between page-load start and the first captured interaction on the session timeline and summarises it across sessions for the period. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading. ## Worked example *A representative reading of **Page Load to First Interaction** for a typical merchant on FullStory.* Suppose the metric drifts from 1.4 seconds to 2.6 seconds over a month. The change tracks a new hero-video block on the homepage that blocks interaction until it buffers. Lazy-loading the video restores responsiveness. The slowdown never threw an error, so only a felt-experience metric like this one would have caught it. For deeper investigation, use Vortex Mind to see which templates slowed; for natural-language exploration, ask Ask Viq which pages feel slowest to visitors. ## Sibling cards merchants should reference together | Card | Why merchants reach for it | | ---------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------- | | [`fs_rage_click_rate`](/nerve-centre/kpi-cards/fullstory/rage-click-rate) | Slow pages drive impatient repeat clicks. | | [`fs_worst_frustration_pages`](/nerve-centre/kpi-cards/fullstory/worst-frustration-pages) | Slow pages often top the frustration ranking. | | [`fs_xc_landing_page_perf_vs_bounce`](/nerve-centre/kpi-cards/fullstory/landing-page-performance-vs-frustration) | Ties page speed to frustration at the landing-page level. | | [`fs_scroll_depth_avg`](/nerve-centre/kpi-cards/fullstory/avg-scroll-depth) | A companion page-engagement signal. | ## Reconciling against the vendor's own dashboard **Where to look in FullStory's own dashboard:** FullStory exposes timing on the session timeline and through its performance-oriented reporting. Confirm period boundaries and page scope match the Vortex IQ profile to reconcile cleanly. **Why the Vortex IQ value may legitimately differ:** | Reason | Direction | What to do | | ----------------------------------------------------------------------------------------------------------------------- | --------- | --------------------------------------- | | **Summary statistic.** A median and a mean of the same interval can read very differently when a few sessions are slow. | Variable | Confirm which statistic each view uses. | | **Period boundary.** Vortex IQ uses 30-day rolling by default; FullStory dashboards may use calendar periods. | Variable | Match the period range. | | **Device and network mix.** A shift toward slower devices or networks moves the figure independent of code. | Variable | Check the device split. | **Cross-connector reconciliation:** complement with the landing-page performance and frustration cards. For divergence investigations, use Vortex Mind. ## Known limitations / merchant FAQs **Q: How often does Page Load to First Interaction update?** The card refreshes on the standard data refresh (typically every 30-60 minutes for live integrations). For real-time signals, force a manual refresh from the dashboard. **Q: Is this the same as a Core Web Vitals score?** No. Core Web Vitals are lab and field web-performance metrics; this is FullStory's observed time to first real interaction. They are related but measured differently, so treat them as complementary. **Q: Why does my FullStory dashboard show a different number?** The most common reasons are which summary statistic is used, period boundaries, and device or network mix. Match these before assuming a real divergence. **Q: Can I customise the alert threshold?** Sensitivity thresholds are configurable per profile in the Sensitivity tab. Set a threshold that reflects acceptable responsiveness for your audience. *** ### Tracked live in Vortex IQ Nerve Centre *Page Load to First Interaction* is one of hundreds of KPI pulses Vortex IQ tracks across FullStory and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. [Start for free](https://app.vortexiq.ai/login) or [book a demo](https://www.vortexiq.ai/contact-us) to see this metric running on your own data.