INLS 151

mon, mar 2, 2015

line-up…• article analysis – pass out feedback• what statistics to use for project?• background info & statistics

– Pew Research, Statista, Statistical Abstracts of the U.S.

• literature databases• search operators

– subject headings / controlled vocabulary– Boolean operators– proximity operators

• handout/discuss midterm

Pass out feedback

General comments…

• Appropriate use of vocabulary• Effectively used evaluation criteria from handout• The term data is plural – can work around this by

using “dataset”– These data…– This dataset…

• Make sure to get the PDF (displays as presented in the actual journal issue – with charts and graphs)

• Use of quotations in your paper – varies according to discipline

Project Description• Identify selected variables (including any subsets)

– e.g. SEX=FEMALE, AGE=18-30, INCOME, LAW5=YES• What sort of relationship among these variables will you try to analyze?

– e.g. we are interested in young women who have been arrested and what sort of income level they report

• What sort of story are you interested in uncovering?– We are interested describing young adult females who have been incarcerated – what sort of

social support systems help these offenders get back on the right track to become contributing members of society. We may also look at children of incarcerated mothers – what challenges do they face and what are some ways to help prevent a cycle of poverty and incarceration?

• What types of information/statistics/facts do you plan to look for to help you develop the story?

• Describe your team work plan – how will you divide the work?– who will pursue which element?– how will you share information?– what is your timeline?

• Include names of all teammates if applicable• Due by class time on Wednesday (I will meet in class with each person/group)

Team Members1 James, Caitlin, Bill & Matt2 Emily, Josh & Porsha3 Grace, Henry, Javairia & Benny4 Terry5 Cherish6 Greg7 Sophia, Ryan, Rickell & Mark8 Alex, Ben, Charlie, Maddie9 Lucy, May & Emma? Kaley, Erin, Sam

Project: variables + statistics

• Could use only 1 variable (frequency, descriptive – mean, median, mode)

• Could use 2 categorical variables and use contingency tables (crosstabs) + Chi squared

• Could focus on certain responses (select cases) + frequency table

Think about what you WANT to look at and we’ll figure out how…

Statistical SourcesPew Research Center

collect their own data Freehttp://www.pewresearch.org/

Statista collect own data + other sources

Subscription UNC Lib

Statistical Abstracts of the U.S.

based on census data free + subscriptionUNC Lib

Historical Statistics of the U.S.

based on census data free + subscriptionUNC Lib

http://www.pewresearch.org/

Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping America and the world. It conducts public opinion polling, demographic research, media content analysis and other empirical social science research.

Pew Research does not take policy positions. It is a subsidiary of The Pew Charitable Trusts.

Statista

• Sample search: viral videos• Sample search: Groupon

Pop quiz

1. In the context of an information retrieval system, what is a controlled vocabulary?

2. If an information retrieval system has a controlled vocabulary, how would using it improve your search experience?

What is a controlled vocabulary?

• A controlled vocabulary is a list of terms (words or phrases) or codes (notation) used for indexing

• Almost always, controlled vocabularies show relationships among terms

Subject headings

• Subject headings are a set of terms or phrases (known as controlled vocabulary) that classify materials.

• Essentially they identify and pull together under a common umbrella information about a given subject.

• Most online catalogs and databases use some form of subject headings, though they may also be called descriptors or keywords.

What are the types of alternative fuels being used or developed for automobiles?

alternative fuels automobiles

electricityethanolnatural gasfuel cells

carsvehiclestransportationmotor vehicle

Abbreviations

BT - Broader Topic - Use to expand your search using a broader topic.

NT - Narrower Topics - Use to focus your search using a narrower topic.

RT - Related Topic - Alternative terminology for your topic.

UF - This is the appropriate subject heading is use for these words. DO NOT search by words listed as UF.

USE - Identifies the correct heading to use for your topic.

http://www.lib.ncsu.edu/tutorials/idea_library/

Handout: Academic search complete

PROXIMITY OPERATORSallow you to specify searches where one word is near,

next to, or in the vicinity of another word

adj specifies that one word is adjacent to another in a document

before/# specifies that the first word is within # words and before the second word

near/# specifies that the first word is within # words of the second word

In-class exercise

• Using the worksheet strategies, complete either search task #1 or #2

• Share with class