# Sentiment Index

## 😁 What is a sentiment index ?

The sentiment index will give you insights in unstructured text entered by your respondents.

For example if your question has a field Comment and your respondent answered "I didn't like your service" ngSurvey will analyze that text and rate it as a negative sentiment.

Unstructured text entered by your respondents can be evaluated to be positive, neutral negative or mixed [sentiments](/form-management/reports/text-reports/sentiment-analysis.md) when they have both positive and negative insights.

## 📈 Sentiment index  chart

Each bar is the total of respondent text answers that were found matching that sentiment category. 

![](/files/-MBYOQDo_ozl4GgCGMjS)

The sentiment index on the left ranges from -10 (very negative) to +10 (very positive). and is surrounded by the sentiment categories based on their answers percentage.

{% hint style="warning" %}
Only text based answer with enabled [compute sentiment score](/form-management/form-designer/answers/answer-properties.md) properties can be used for sentiment index reporting. 
{% endhint %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ngsurvey.com/form-management/reports/report-builder/report-items/sentiment-index.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.