Rüdiger Grotjahn

970 total citations
30 papers, 624 citations indexed

About

Rüdiger Grotjahn is a scholar working on Language and Linguistics, Management Science and Operations Research and Artificial Intelligence. According to data from OpenAlex, Rüdiger Grotjahn has authored 30 papers receiving a total of 624 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Language and Linguistics, 6 papers in Management Science and Operations Research and 5 papers in Artificial Intelligence. Recurrent topics in Rüdiger Grotjahn's work include Linguistic Education and Pedagogy (10 papers), Linguistic research and analysis (9 papers) and Psychometric Methodologies and Testing (6 papers). Rüdiger Grotjahn is often cited by papers focused on Linguistic Education and Pedagogy (10 papers), Linguistic research and analysis (9 papers) and Psychometric Methodologies and Testing (6 papers). Rüdiger Grotjahn collaborates with scholars based in Germany, Iran and Slovakia. Rüdiger Grotjahn's co-authors include Thomas Eckes, Reinhard Köhler, Gejza Wimmer, Gabriel Altmann, Christine Klein-Braley, Purya Baghaei, Gabriele Kasper, Boris Forthmann, Philipp Doebler and Claudia Harsch and has published in prestigious journals such as SHILAP Revista de lepidopterología, System and Studies in Second Language Acquisition.

In The Last Decade

Rüdiger Grotjahn

23 papers receiving 481 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Rüdiger Grotjahn Germany	11	305	184	147	126	124	30	624
Rie Koizumi Japan	13	334 1.1×	358 1.9×	161 1.1×	160 1.3×	152 1.2×	59	703
Fred Davidson United States	12	397 1.3×	231 1.3×	304 2.1×	63 0.5×	346 2.8×	36	753
Gary Buck United States	10	491 1.6×	403 2.2×	227 1.5×	99 0.8×	189 1.5×	14	816
Pamela Rogerson‐Revell United Kingdom	12	296 1.0×	81 0.4×	182 1.2×	75 0.6×	91 0.7×	16	594
Daniel R. Isbell United States	14	257 0.8×	188 1.0×	153 1.0×	114 0.9×	158 1.3×	40	676
Priyanvada Abeywickrama United States	3	624 2.0×	425 2.3×	333 2.3×	44 0.3×	1.0k 8.4×	4	1.7k
Joan Jamieson United States	14	340 1.1×	286 1.6×	197 1.3×	75 0.6×	240 1.9×	33	692
Gary J. Ockey United States	16	443 1.5×	194 1.1×	196 1.3×	112 0.9×	163 1.3×	34	728
Dustin Crowther United States	13	337 1.1×	269 1.5×	137 0.9×	140 1.1×	113 0.9×	28	725
Margaret Heritage United States	17	75 0.2×	262 1.4×	68 0.5×	131 1.0×	847 6.8×	35	1.2k

Countries citing papers authored by Rüdiger Grotjahn

Since Specialization

Citations

This map shows the geographic impact of Rüdiger Grotjahn's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Rüdiger Grotjahn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Rüdiger Grotjahn more than expected).

Fields of papers citing papers by Rüdiger Grotjahn

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Rüdiger Grotjahn. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Rüdiger Grotjahn. The network helps show where Rüdiger Grotjahn may publish in the future.

Co-authorship network of co-authors of Rüdiger Grotjahn

This figure shows the co-authorship network connecting the top 25 collaborators of Rüdiger Grotjahn. A scholar is included among the top collaborators of Rüdiger Grotjahn based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Rüdiger Grotjahn. Rüdiger Grotjahn is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Grotjahn, Rüdiger, et al.. (2023). Der Faktor Alter beim Spracherwerb: Einführung in den Themenschwerpunkt. SHILAP Revista de lepidopterología.

Grotjahn, Rüdiger. (2015). The electronic C-Test bibliography: version 2015. 1 indexed citations

Baghaei, Purya & Rüdiger Grotjahn. (2014). Establishing the construct validity of conversational C-Tests using a multidimensional Rasch model. 7 indexed citations

Grotjahn, Rüdiger. (2011). C-Tests – Aspekte der Validität. Deutsch als Fremdsprache. 3 indexed citations

Porsch, Raphaela, et al.. (2010). Höverstehen und Hör-Sehverstehen in der Fremdsprache: unterschiedliche Konstrukte?. 21(2). 143–190.

Grotjahn, Rüdiger. (2010). Der C-test : Beiträge aus der aktuellen Forschung = The C-test : contributions from current research. Peter Lang eBooks. 10 indexed citations

Grotjahn, Rüdiger. (2006). Der C-Test : Theorie, Empirie, Anwendungen = The C-test : theory, empirical research, applications. Peter Lang eBooks. 17 indexed citations

Eckes, Thomas & Rüdiger Grotjahn. (2006). A closer look at the construct validity of C-tests. Language Testing. 23(3). 290–325. 134 indexed citations

Grotjahn, Rüdiger. (2005). Subjektmodelle. Implikationen für die Theoriebildung und Forschungsmethodologie der Sprachlehr- und Sprachlernforschung. 16(1). 23–56. 2 indexed citations

10.

Grotjahn, Rüdiger. (2003). Der Faktor „Alter“ beim Fremdsprachenlernen Mythen, Fakten, didaktisch-methodische Implikationen. Deutsch als Fremdsprache. 4 indexed citations

11.

Coleman, James A., Rüdiger Grotjahn, & Ulrich Raatz. (2002). University language learning and the C-Test. 1 indexed citations

12.

Wimmer, Gejza, Reinhard Köhler, Rüdiger Grotjahn, & Gabriel Altmann. (1994). Towards a theory of word length distribution. Journal of Quantitative Linguistics. 1(1). 98–106. 73 indexed citations

13.

Grotjahn, Rüdiger. (1991). O Teste-C - de leitura - Uma visão panorâmica. SHILAP Revista de lepidopterología. 1 indexed citations

14.

Grotjahn, Rüdiger. (1988). Introducing (Applied) Linguists to Statistics: A Review of Two Books and Some General Remarks. Studies in Second Language Acquisition. 10(1). 63–68. 1 indexed citations

15.

Grotjahn, Rüdiger. (1988). Testing spoken language. System. 16(3). 393–394. 49 indexed citations

16.

Grotjahn, Rüdiger, et al.. (1987). Taking their measure : the validity and validation of language tests. Medical Entomology and Zoology. 19 indexed citations

17.

Grotjahn, Rüdiger. (1987). On the methodological basis of introspective methods.. 70 indexed citations

18.

Grotjahn, Rüdiger. (1986). Test validation and cognitive psychology: some methodological considerations. Language Testing. 3(2). 159–185. 46 indexed citations

19.

Grotjahn, Rüdiger. (1982). Ein statistisches Modell für die Verteilung der Wortlänge. Zeitschrift für Sprachwissenschaft. 1(1). 44–75. 16 indexed citations

20.

Grotjahn, Rüdiger. (1979). Linguistische und statistische Methoden in Metrik und Textwissenschaft. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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