What the picker changes

Top topics digest — the cards score the selected period against the prior 4 weeks.
12-week heatmap & outlet matrix — show the 12 weeks ending at the selected week (they slide back with the picker, they aren’t a fixed snapshot).
Per-topic volume / alias drift — same 12-week trailing window, anchored on the selected period.
Coverage gap quadrant — scores the selected period against the 12 weeks before it (not including it).
Anomaly cards — only show alerts the detector fired during the selected period. Quiet weeks legitimately show none.

What stays as-is

Outlet orientation strip / lean colours — context-only, drawn from the last 12 weeks of activity regardless.
Co-occurrence graph — recent-activity anchored, not picker-driven.
Source & topic profiles — all-time data for the topic; the picker doesn’t affect them.

Rolling 7 days is a sliding live window for “current vibes”; switch to Weekly to compare specific weeks side-by-side.

Weekly Rolling 7 days

live window

Topic · social

Public Transit Safety

51 posts · 9,582 engagement · first seen 1 May 2021 · last seen 5 Oct 2026

The safety of passengers, drivers, and bystanders on New Zealand's public transport network, encompassing assaults on bus and train drivers, passenger injuries, and crashes involving public transit vehicles.

Stance breakdown

How the per-edge framings classify across 19 classified edges. Each framing is labelled by a small AI stance classifier; see the methodology page for details.

37%

47%

11%

Supportive 7 Critical 9 Neutral / explainer 1 Mocking 2

Sentiment breakdown

Whole-post emotional valence across 19 classified posts that reference this topic. Distinct from stance: a post can be supportive of the topic and still negative in tone (an angry supporter) — the two together capture the texture short-form posts compress into very few words.

21%

58%

Positive 4 Neutral 4 Negative 11

Platform mix

Where the conversation is happening. Engagement is volume-weighted (likes + 2×shares + 3×replies); a small number of high-impact posts can outrank a high-volume but low-engagement platform.

facebook

4 posts · 1,743 engagement

1,743
reddit

6 posts · 1,666 engagement

1,666
youtube

9 posts · 434 engagement

434

Public Transit Safety

Stance breakdown

Sentiment breakdown

Platform mix

Top posts by engagement