A SHARED BRIEFING FOR RESEARCHERS & BUILDERS

When does a knowledge graph
empower, and when does it overwhelm?

This is a self-contained briefing and a working instrument. It packages what the HCI literature knows about the link between a user's sense of control and visualising data as an interactive context / knowledge graph — then lets you feel each finding by hand. Built to be read by a multidisciplinary team: skim the takeaways, expand the evidence, and leave with concrete rules you can build against.

The one big idea. A graph's danger isn't its raw size — it's the effective load: how many things compete for attention at once. The same 140-node graph can feel like a wall or a calm map depending entirely on how it's presented. Control is a design choice, not a property of the data.
01 · LEARN

Concepts

Twelve shared terms so a designer, a researcher and an engineer mean the same thing by "focus + context" or "hairball".

02 · PLAY

Instrument

Drag the size & density dials, toggle control-restoring patterns, switch representations, and watch the control meter respond in real time.

03 · WHY

Evidence

The studies behind every claim — takeaway first, expand for method, sample and the actual numbers, with links to the sources.

04 · APPLY

Rules

Eleven concrete design rules for anyone building a graph UI, each tied back to the evidence.

How to read the instrument. The left rail changes the graph and turns on patterns. The centre is the stage (switch between node-link, matrix and list). The right shows a live perceived-control estimate plus the principle you're currently demonstrating. Try this first: push Size to the max with everything off, watch control collapse — then turn on Focus + context and click a node. That recovery is the whole thesis.
LIVE INSTRUMENT

Feel the trade-offs by hand

Everything here maps to a finding. The meter on the right tracks the user's likely sense of control; the card beneath it names the principle you're demonstrating right now.

THE GRAPH
Size18 nodes
Density1.6 edges/node
CONTROL-RESTORING PATTERNS
FILTER TYPES (FACETING)
NARRATIVE MODE
PERCEIVED CONTROL
/100

THE EVIDENCE

What the studies actually found

Tap any card for the professional summary, the method and sample, the key numbers, and a link to the source. Summaries are paraphrased — follow the links for the originals.

SHARED VOCABULARY

Twelve terms, one shared language

So a designer, a researcher and an engineer mean the same thing in the same meeting.

THE RULEBOOK

Eleven rules for building a graph UI

Each rule is a direct consequence of the evidence. Steal them.