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Natural Language Processing

LIWC (Linguistic Inquiry and Word Count)

LIWC (Linguistic Inquiry and Word Count) is a text analysis program available for purchase. It calculates the degree to which various categories of words are used in a text, and can process texts ranging from e-mails to speeches, poems and transcribed natural language in either plain text or Word formats. A free, minimalist web version is available through the website.

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Natural Language Processing

General Inquirer

The General Inquirer is a historically important program for content analysis of textual data originally developed in the 1960s by Philip Stone and his colleagues at the Harvard Laboratory of Social Relations. Though the original release used punched cards, a version the program is available by request, and can be obtained by e-mailing Roger Hurwitz from an academic address. A minimalist web version capable of processing small files is also available. The General Inquirer's homepage is maintained in Philip Stone's memory.

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Visualization

WORDij

WORDij is a free semantic network tool for capturing relationships between words and assigning word-pair link strengths. This information is used as the basis for more sophisticated analysis, such as word network structure mapping. WORDij requires registration for download.

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Analysis

UCINET

UCINET is a software package for analyzing network data, available for purchase and with a 90-day trial period. This tool has been in continuous development since the 1980s, and now includes the capacity to gather and analyze social network data.

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Natural Language Processing

CATPAC

CATPAC is a program available for purchase designed to summarize a text's main ideas. It is multilingual and primarily aimed at researchers in the sciences, and can handle large volumes of text. Text must be formatted in ASCII or RTF. The CATPAC website is no longer available or maintained as of 2014. An archived version of the site and its information can be viewed via the Internet Archive.

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Natural Language Processing

TextQuest

TextQuest is a text analysis program available for purchase. It is designed to conduct analysis ranging from word lists to concordances to content and readability analyses.

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Analysis

Minnesota Contextul Content Analysis (MCCA)

Minnesota Contextual Content Analysis is a free legacy tool that has been maintained online. It characterizes texts based on relative frequency, and generates statistical analysis from it. It also includes classifications and is designed to handle texts in a wide range of lengths.

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Search

WordStat

WordStat is a commercial software package for content analysis and text mining on natural language text such as interview transcripts. It also includes features for automatic document tagging and classification.

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Natural Language Processing

Profiler Plus

Profiler Plus is a commercial general-purpose text analysis program based on natural language processing. It supports multiple languages and can output in text, XML and CSV.

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Visualization

Crawdad Text Analysis Software

Crawdad is a commercial software package for qualitative data analysis based on natural language processing. It generates a network model of a text and calculates word influence based on its position within the network. It also includes visualization, classification and comparator features. A trial version is available by request. The Crawdad website is no longer maintained or available. It can still be viewed via the Internet Archive.

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