Skip to main content
MethodScience & Data AnalysisData analysisIntermediate

Analyse a relationship between two variables

A scatter-based relationship analysis with correlation, outliers, confounders and honest wording.

This is a practical, copy-paste process for you suspect two things move together (income and internet use, ad spend and sales).. Use it when you want a clear structure, then add your own details and the linked evidence.

Published by Deepstory Research. Reviewed Sep 2026.

How to use this method

  1. 1. Copy or downloadCopy the prompt below, or download the method file and attach it to your chat.
  2. 2. Paste into any AIChatGPT, Claude, Gemini or Copilot. Replace each [PLACEHOLDER] with your details, or let the AI ask you.
  3. 3. Add evidenceAttach the evidence files listed on this page so the AI works from sourced numbers, not guesses.

The prompt

Paste it as-is. The AI will ask for anything still in [BRACKETS].

Download .md
# Analyse a relationship between two variables
Method by Deepstory Research: deepstoryresearch.com/method/correlation-without-causation

You are an econometrician who is strict about causal claims. Follow the method below step by step. Goal: A scatter-based relationship analysis with correlation, outliers, confounders and honest wording.

## My inputs
- Variables: [VARIABLES]  (example: GDP per capita and internet use)
- Units of observation: [UNITS_OF_OBSERVATION]  (example: countries in one year)
- Data: [DATA]  (example: attach)

Before you start: if any input above is still in [BRACKETS] or missing, ask me for it in one short numbered list and wait. Do not guess. If I attached files (data, briefs, Deepstory evidence files), treat them as the primary source.

## Steps to follow
1. Align both variables to the same units and period.
2. Compute correlation and describe the pattern.
3. Identify outliers and influential points.
4. List plausible confounders and reverse causality.
5. Word the conclusion as association unless a causal design exists.

## Deliver the output in this structure
- Scatter spec
- Correlation
- Outliers
- Confounders
- Conclusion wording

## Quality rules
- No causal verbs ("drives", "causes") without a causal design.
- Label every number as FACT (with source and date), ESTIMATE (show the calculation) or ASSUMPTION.
- If a Deepstory evidence file is attached, use its figures as the reference values and cite its source references; tag claims that are not from it as [UNVERIFIED].
- End with: the 3 assumptions that matter most, what would change the answer, and the single best next step.

What you need to give the AI

InputPlaceholderExample
Variables[VARIABLES]GDP per capita and internet use
Units of observation[UNITS_OF_OBSERVATION]countries in one year
Data[DATA]attach

Use it when

  • You suspect two things move together (income and internet use, ad spend and sales).

What you get

  • Scatter spec
  • Correlation
  • Outliers
  • Confounders
  • Conclusion wording

The procedure, step by step

Read this before you run it, so you can check the AI actually followed the method.

  1. 1

    Align both variables to the same units and period.

  2. 2

    Compute correlation and describe the pattern.

  3. 3

    Identify outliers and influential points.

  4. 4

    List plausible confounders and reverse causality.

  5. 5

    Word the conclusion as association unless a causal design exists.

Quality checks built into the prompt

  • • No causal verbs ("drives", "causes") without a causal design.
  • • Every number labelled FACT, ESTIMATE or ASSUMPTION; claims outside attached evidence tagged [UNVERIFIED].

Evidence to use with this method

Methods tell the AI how to think. Evidence gives it sourced numbers to think with. Download a context file and attach it with the prompt.

EvidenceGeopolitical

Income and internet use

Did higher-income selected economies also report more internet use? GDP per capita (current US$) vs Individuals using the Internet (% of population) · common year 2024 · n=20

EvidenceGeopolitical

Internet use ranking

Which selected economies reported the highest internet-use rates? Individuals using the Internet (% of population) · common year 2024 · 20 selected economies with published values

Run next

Methods that chain well after this one.

Deepstory methods are process guidance for AI tools. Review AI output before relying on it; legal, tax, medical and investment decisions need a qualified professional.