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Two-way ANOVA and the News Coverage Index (2012): TV News Story Length by Story Placement and Media Outlet Type

Dataset
By: The Odum Institute Published: 2017 | Product: SAGE Research Methods Datasets
Data Type: Numeric
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Abstract

This dataset example introduces researchers to two-way Analysis of Variance (ANOVA). Two-way ANOVA is an extension of one-way ANOVA that allows researchers to examine the influence of two different categorical variables on one continuous variable. Two-way ANOVA lets researchers assess the main effect of each categorical variable on the continuous variable in question as well as the interactive effect of the two categorical variables combined. This example uses a subset of data from the Pew Research Center’s Project for Excellence in Journalism News Coverage Index for 2012. Specifically, we test whether the length of TV news stories differs based on where in the broadcast the story is placed and whether the news program in question airs on network TV or cable TV. Understanding the factors ...

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About This Dataset
Data Source Citation

Pew Research Center. (2012). 2012 Project for Excellence in Journalism News Coverage Index [Data file]. Retrieved from http://www.journalism.org/datasets/2012-news-coverage-index-data-set/

Full title of originating dataset

2012 Project for Excellence in Journalism News Coverage Index (NCI)

Data author(s) and affiliations

Pew Research Center

Data Universe

American news stories from newspapers, online news sources, network television, cable news, and radio news

Funding sources/suppliers

Pew Research Center

Pew Research bears no responsibility for interpretations presented or conclusions reached based on analysis of the data

Sample/sampling procedures

A multistage, purposive sampling process of media outlets was employed to provide a broad, illustrative but not strictly representative sample of the media universe.

Weighting

Weights for news sources: Newspapers (0.19), Online (0.30), Network TV (0.15), Cable TV (0.23), Radio (0.12)

Data collection dates

01-2012 to 05-2012

Time frame of analysis

2012

Text Unit

Geographic Unit

Location covered by data

United States

Links to SRM content
List of variables

time

Broadcast Start Time

durasec

Duration in Seconds

placement

Placement

format

Story Format

focus

Geographic Focus

topic

Topic

media

Media Type

Methods Map
Two-way analysis of variance