Non-symmetrical correspondence analysis to evaluate how age influences the addiction discourses

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Articolo

Rivista

STATISTICA & APPLICAZIONI

Sezione

Open Access

Titolo

Non-symmetrical correspondence analysis to evaluate how age influences the addiction discourses

Autori

Enrico Ciavolino, Antonello D'Ambra, Claudia Venuleo, Marta Vernai

Editore

Vita e Pensiero

Formato

Articolo |

Pdf

Online da

01-2018

Doi

10.26350/999999_000001

Issn

1824-6672 (stampa) | 2283-6659 (digitale)

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Descrizione Commenti dei lettori

The current paper aims to present the method of Non-Symmetrical Correspondence Analysis (NSCA) based on Emerson’s orthogonal polynomials, which takes into account, in efficient way, the ordinal structure of the data. The extension of NSCA is the so called Singly Ordered Non-Symmetrical Correspondence Analysis version (SONSCA), that, by taking into account the ordinal structure in the table, improving the interpretation ability of the analysis. The methods was applied to 40 in-depth interviews, gathered with people in treatment for their problems with addiction. NSCA and SONSCA are used to evaluate if the classes of age of the subjects interviewed influence the addiction thematic categories that characterize their discourses.The work provides insight on NSCA and SONSCA methods and how they could be applied in the psychological context and in particular to study the dependence between ordinal and categorical variables reported in a contingency table.

keywords

Non-Symmetrical Correspondence Analysis (NSCA), Emerson’s Orthogonal Polynomials, Singly Ordered Non-Symmetrical Correspondence Analysis (SONSCA), Addiction Thematic Categories, Classes of Age.

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