Diffusion of Latent Semantic Analysis as a Research Tool: A Social Network Analysis Approach Yaşar Tonta H acettepe University Department of Information Management [email_address] yunus.hacettepe.edu.tr/~tonta/ Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada. Hamid Darvish Çankaya University Department of Computer Engineering darvish @ cankaya . e du.tr academic.cankaya .edu.tr/~ darvish /

Background Research questions and hypotheses Data sources and method Findings Conclusion Outline Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Background

Research questions and hypotheses

Data sources and method

Findings

Conclusion

Knowledge acquisition, induction and representation tool (Plato’s problem) Fully automatic technique to extract meaning and infer relations among words in passages of discourse Uses Singular Value Decomposition technique Applications in information retrieval, cognitive science, knowledge acquisition, machine learning, intelligent tutoring systems, computational biology Improves information retrieval (cf. Vector Space or Boolean models) Latent Semantic Analysis (LSA) Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Knowledge acquisition, induction and representation tool (Plato’s problem)

Fully automatic technique to extract meaning and infer relations among words in passages of discourse

Uses Singular Value Decomposition technique

Applications in information retrieval, cognitive science, knowledge acquisition, machine learning, intelligent tutoring systems, computational biology

Improves information retrieval (cf. Vector Space or Boolean models)

How fast did LSA as a research tool diffuse and become a part of the regular scientific discourse in different fields? As LSA becomes a more mainstream research tool, does the number of papers on LSA decrease ? D o fewer papers with LSA in their titles get published while the number of papers with LSA in their topics increase ? Research Questions Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

How fast did LSA as a research tool diffuse and become a part of the regular scientific discourse in different fields?

As LSA becomes a more mainstream research tool, does the number of papers on LSA decrease ?

D o fewer papers with LSA in their titles get published while the number of papers with LSA in their topics increase ?

Data Sources & Methods Searched W eb o f S cience for literature on LSA (1990-2008) 65 papers with “latent semantic analysis” in their titles ( only ) 250 papers with “latent semantic analysis” in their their topics (but not in their titles) Bibliometric methods Lotka ’ s Square Law Citation analysis C o-authorship analys is Social Network Analysis Cluster analysis Centrality measures Density Betweenness Closeness Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Searched W eb o f S cience for literature on LSA (1990-2008)

65 papers with “latent semantic analysis” in their titles ( only )

250 papers with “latent semantic analysis” in their their topics (but not in their titles)

Bibliometric methods

Lotka ’ s Square Law

Citation analysis

C o-authorship analys is

Social Network Analysis

Cluster analysis

Centrality measures

Density

Betweenness

Closeness

Findings Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Findings

# of papers on LSA and # of times cited Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

T hree LSA papers ( citation classics ) Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada. Citations to seminal LSA papers

Centrality measures for journals cited in papers with LSA in titles and topics Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada. # of Journals Density Betweenness Closeness LSA in Title 275 0.31840 0.06155 0.71958 LSA in Topic 1,001 0.29466 0.02866 0.69763

The most prolific LSA researche r s Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Network of LSA researchers with specialties Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Network of journals cited in papers with LSA in titles Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Network of journals cited in papers with LSA in topics Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

# of terms in cocited papers with LSA in titles Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada. # of terms in cocited papers with LSA in topics

LSA is a multidisciplinary method Data fits Lotka’s S quare Law M ost prolific LSA researchers are Landauer, Kitsch, Foltz an d Laham. The network of LSA reserachers is quite loose The network of the journals citing LSA papers is quite dense LSA is an indispensable part of the scientific discourse. Conclusion Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada.

LSA is a multidisciplinary method

Data fits Lotka’s S quare Law

M ost prolific LSA researchers are Landauer, Kitsch, Foltz an d Laham.

The network of LSA reserachers is quite loose

The network of the journals citing LSA papers is quite dense

LSA is an indispensable part of the scientific discourse.

Diffusion of Latent Semantic Analysis as a Research Tool: A Social Network Analysis Approach Yaşar Tonta H acettepe University Department of Information Management [email_address] yunus.hacettepe.edu.tr/~tonta/ Symposium on Informetrics and Scientometrics Research, 2009 ASIS&T Annual Meeting , Nov . 6- 11, 2009, Vancouver, Canada. Hamid Darvish Çankaya University Department of Computer Engineering darvish @ cankaya . e du.tr academic.cankaya .edu.tr/~ darvish /