> ## Documentation Index
> Fetch the complete documentation index at: https://api.thesapientcompany.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The 4 lenses

> Each lens is a different cut of the same brain response.

A scan returns four lenses. Each is a 0–100 read on one dimension of how a brain responds to your content, and each traces back to specific brain networks, so every number has a *why*.

| Lens              | What it analyzes for                                    |
| ----------------- | ------------------------------------------------------- |
| **Attention**     | Whether the viewer is locked in, and where focus slips. |
| **Memory**        | Whether the content will be remembered and absorbed.    |
| **Buy / Not Buy** | Reward and desire: whether they'll want it.             |
| **Manipulation**  | Persuasive or coercive load: pressure vs. reasoning.    |

## Choosing a lens

You can read all four from any scan, or focus on the ones that fit the job:

* For **ads and creative**, start with **Attention** and **Buy / Not Buy**.
* For **brand and narrative**, lean on **Memory**.
* Use **Manipulation** as a guardrail.

## The lenses

<Columns cols={2}>
  <Card title="Attention" href="/knowledge-base/lenses/attention">
    Is the viewer locked in?
  </Card>

  <Card title="Memory" href="/knowledge-base/lenses/memory">
    Will it be remembered?
  </Card>

  <Card title="Buy / Not Buy" href="/knowledge-base/lenses/purchase-intent">
    Reward and desire: will they want it?
  </Card>

  <Card title="Manipulation" href="/knowledge-base/lenses/manipulation">
    Pressure vs. persuasion.
  </Card>
</Columns>