Deck 9: Text Analytics

Question 1

Which of the following is NOT a text analytic procedure?

A) Creating keyword-in-context dictionaries
B) Sentiment analysis
C) Topic modeling
D) Analyzing ngrams
E) All of the above are text analytic procedures

Answer 1

E
Text analytic functions include creating keyword-in-context dictionaries, creating bar charts of word frequencies, scraping we pages for text, scraping social media for text, creating multigroup word frequency charts, creating word clouds, creating word comparison clouds, creating word maps, doing sentiment analysis, conducting topic modeling, creating lexical dispersion plots, and analyzing bigrams and ngrams.

Question 2

A collection of documents to be used in text analytic research is called a __________________.

Answer 2

A corpus.
However, there are various formats for corpora. The "corpus" format is associated with the quanteda package. The "Corpus" format is associated with the tm package. There are other formats.

Question 3

In one short sentence, what does the "gutenbergr" package do?

Answer 3

It contains functions to access many of the tens of thousands of public domain books and texts archived by Project Gutenberg, some of which, such as the Declaration of Independence, were used as examples in Chapter 9.

Question 4

Which R package can be used to read in Word (.doc or .docx) files?

A) tm
B) quanteda
C) textreadr
D) tidytext

Question 5

In one short sentence, what are "stopwords" in the quanteda package?

Question 6

What is a kwic index?

A) For a given corpus, a kwic index alphabetically lists all words or words of researcher interest, one instance of a word per line, surrounded by a window of leading and trailing words.
B) For a given corpus, a kwic index is the digital analog of the index found in the back of most textbooks, except it is generated automatically.
C) For a given corpus, a kwic index is an automated index constructed in the K language, which is known for its speed, facility in handling arrays, and expressive syntax.
D) For a given corpus, a kwic index is an index to the global policy documents of the Kawartha World Issues Centre.

Question 7

What does the term "bigram" mean?

A) A graph with two levels.
B) A phrase with two words treated as a single token.
C) Two unigrams.
D) The term "bigram" is short for "big ram", where ram is computer memory. Many text analytic processes require big ram.

Question 8

What is the name of the visualization package used for many of the figures for text analytic results in Chapter 9? _________________________.

Question 9

What was the name of the package used in Chapter 9 for very simple web scraping from html (web) format to text format? _____________________________.

Question 10

Let "x" be an object of data class "Corpus" and "SimpleCorpus", associated with the "tm" package. To view the contents of "x" directly, which command from the tm package is used:

A) View
B) str
C) summary
D) inspect

Question 11

The TextMiner (tm) package works with objects in both tdm and dtm formats. In one short sentence, what do tdm and dtm stand for and what is the main difference?

Question 12

"Tokens" can NOT be which of the following?

A) A word
B) An ngram
C) A paragraph
D) Any of the above can be a token

Question 13

What are these terms examples of : UTF-8 (Unicode), ISO-8859-1 (Latin 1), and EBCDIC (IBM)?

A) Tokenization
B) Types of character encoding
C) Types of lexical dispersion
D) Types of latent dirichlet analysis

Question 14

Which technique might be loosely characterized as a form of "factor analysis for words"?

A) Latent Dirichlet Analysis (LDA)
B) Multigroup Analysis of Word Frequencies
C) Comparison Word Clouds
D) Lexical Dispersion Analysis

Question 15

When the term "excit" is made to include "excite", "excited", "excitement", and other works beginning with "excit", one has engaged in word …

A) Truncating
B) Wild cards
C) Trimming
D) Stemming