RapidMiner

Include Negations in Dictionary based Sentiment Approach

Hi all,

 

I want to use the dictionary based sentiment approach for texts by using a self-created dictionary.

The dictionary sentiment approach does not account for negations as far as I know.

For example: Today I was not really productive.

The word "productive" is positive but because of the "not" the whole sentence has a negative meaning instead of positive.

 

How does the dictionary based sentiment approach of Rapidminer account for this issue?

 

All the best,

Katrin

2 REPLIES
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RM Staff
RM Staff

Re: Include Negations in Dictionary based Sentiment Approach

Hi Katrin,

 

welcome to the community! I've written the operator myself and I am very happy that you use it. The current version of the operator does not handle negations. Negations are in general a tricky thing also in more sophisticated approaches like SVMs. I am not sure how this dictionary based approach could handle this. If you have a solution in mind I am happy to have a look if we can implement this.

 

Cheers,

Martin

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Head of Data Science Services at RapidMiner

Re: Include Negations in Dictionary based Sentiment Approach

Hi,

Negation is in fact only a small part of the problem: imagine the sentence "probably a possible tumor" in the notes of a radiologist. 

Smiley Happy

Sven

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