Uma medida de linguagem natural de ideologia no Senado Brasileiro

Figueredo, Felipe C. de; Mueller, Bernardo; Cajueiro, Daniel O.

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Revista Brasileira de Ciência Política

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ARTIGOS • Rev. Bras. Ciênc. Polít. (37) • 2022 • https://doi.org/10.1590/0103-3352.2022.37.246618 copiar

Uma medida de linguagem natural de ideologia no Senado Brasileiro

Autoria SCIMAGO INSTITUTIONS RANKINGS

Resumo:

Este trabalho usa um corpus de mais de duas décadas de discursos proferidos por senadores federais brasileiros em cinco legislaturas para estimar uma medida de ideologia política. Nós empregamos uma técnica computacional que extrai do discurso político os dicionários que melhor traduzem o conteúdo de cada ideologia. Por meio desse método de aprendizado supervisionado, calculamos a precisão da classificação sobre esses textos políticos e medimos o aumento da polarização nas legislaturas. O método também é usado para contribuir para o debate sobre a mensuração de ideologia partidária no Brasil ao investigar a evolução dos padrões de ideologias políticas durante um período de profundas mudanças na sociedade brasileira.

Palavras-chave:
ideologia; linguagem; aprendizado por máquina; polarização

	50^th	51^th	52^th	53^th	54^th	55^th
tf-idf	77.1	69.1	79.6	80.1	83.2	83.2

	50^th	51^th	52^th	53^th	54^th	55^th
tf-idf	67.6	65.1	73.6	75.7	79.2	81.5

	50^th	51^th	52^th	53^th	54^th	55^th
Left	2,784	2,498	4,833	4,932	7,594	5,175
Center	4,005	5,105	9,288	7,516	6,438	4,864
Right	3,233	1,975	4,760	4,846	3,295	2,324
Total	10,022	9,578	18,881	17,294	17,327	12,364

	50^th	51^th	52^th	53^th	54^th	55^th
Left	27%	26%	26%	28%	44%	42%
Right	40%	53%	49%	43%	37%	39%
Center	33%	21%	25%	29%	19%	19%

	50^th		51^st		52^nd
	Precision	Recall	Precision	Recall	Precision	Recall
Left	0.80	0.68	0.87	0.46	0.75	0.68
Center	0.59	0.85	0.61	0.97	0.74	0.86
Right	0.79	0.46	0.76	0.07	0.76	0.59
	53^rd		54^th		55^th
	Precision	Recall	Precision	Recall	Precision	Recall
Left	0.72	0.76	0.73	0.95	0.77	0.91
Center	0.73	0.85	0.83	0.80	0.71	0.85
Right	0.84	0.58	0.98	0.39	0.95	0.20

Left	Center	Right
Land	Health	Development
Reform	Northeast	Labor
People	Cities	Production
Labor	Economy	Agriculture
Agrarian	Men	Northeast
Wealth	Agrarian	Amazon
Cardoso	Land	Communication
Respect	Agriculture	Reform
Rights	Energy	Market
CPI	Plan	Producers
Children	Center	Agricultural
Women	Market	Capital
Reelection	Companies	Rural
Unemployment	Debt	Teaching
Security	Investments	Interest

Left	Center	Right
Wealth	Energy	Northeast
CPI	Health	Companies
Debt	Democracy	Energy
Wage	Production	Teaching
International	Economy	Agriculture
Economy	Agriculture	Production
Money	Market	Water
Responsibility	CPI	Indians
Rights	Reform	University
Crisis	Northeast	New
Reform	Teaching	Knowledge
Poverty	Violence	Culture
Children	Investment	World
Ethics	Court	Reform
Women	Water	Producers

Left	Center	Right
Reform	Newspaper	CPI
Health	Stream	Northeast
Children	CPI	God
Women	Health	Opposition
Security	Folha	Safety
CPI	Growth	Wage
Rights	Bank	Police
Growth	Money	Energy
Economy	Production	Tributary
PEC	Dirceu	Growth
Land	Opposition	Companies
Tributary	Crisis	Interest
Family	Magazine	Economy
Police	Water	Court
Agrarian	Northeast	Corruption

Left	Center	Right
Health	CPI	Man
Development	Crisis	God
Debate	Court	Life
Rights	Man	Northeast
School	Opposition	CPI
Wealth	Economy	Justice
Fight	History	Police
Women	Servers	Family
Retired	Money	Safety
Children	Magazine	Doctor
Universities	CPMF	Crisis
Wage	Reform	Father
Professor	Safety	Paranaíba
Violence	Family	Fight
Oil	Problem	Court

Left	Center	Right
Women	Minority	Laborite³⁶ 36 Member or supporter of the Worker’s Party (trabalhista).
Rights	Economy	Strength
Violence	Court	Money
Wealth	Corruption	Doctors
Children	Power	Family
Northeast	Supreme	Safety
Liberty	Document	Energy
Growth	Truth	Industry
Socialist	Growth	Producers
Energy	Cities	Man
Doctors	Companies	God
School	Production	Police
Reform	Opposition	Women
University	Works	Frontier
Plan	CPI	Infrastructure

Left	Center	Right
Women	Women	Security
Impeachment	Money	Production
Socialism	Socialism	Money
Reform	Energy	Agriculture
Coup	Progressive	Family
Rights	Water	Companies
Violence	Justice	Police
Crime	Security	Rights
Fight	Impeachment	Laborite
PEC	Family	Workers
Fiscal	Workers	Impeachment
Security	Fiscal	Democratic
Michel	Interest	Economic

Universidade de Brasília. Instituto de Ciência Política Instituto de Ciência Política, Universidade de Brasília, Campus Universitário Darcy Ribeiro - Gleba A Asa Norte, 70904-970 Brasília - DF Brasil, Tel.: (55 61) 3107-0777 , Cel.: (55 61) 3107 0780 - Brasília - DF - Brazil
E-mail: rbcp@unb.br

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