Language Apps Year Report Vocabulary/ Grammar Proficiency
 Oral Proficiency Motivation Language Aptitude
1 LingQ 2023 2023 Report TESTED
TESTED TESTED
2 Busuu 2021
 2021 Report TESTED
 TESTED TESTED TESTED
3 TrueNorth Test (TNT)
 2020 Report
TESTED

4 2019 Report TESTED TESTED TESTED
5 Pimsleur 2019 Report
TESTED TESTED
6
2019
Report
TESTED
TESTED
7
2018
Report
TESTED
TESTED

8
2017
Report
  
TESTED
  
9
2016
Report
TESTED
    
10
2016
Report
TESTED
TESTED

11
2015
Report
TESTED
    
12
2012
Report
TESTED


13
2009
Report
    
TESTED
14
Rosetta Stone
Auralog Tell Me More
Berlitz
2009
Report
    
TESTED
15 Rosetta Stone 2009 Report TESTED * TESTED*

* Self-reported study time.

Research Studies


1. "LingQ Efficacy Study 2023”.
    Vesselinov, R.,  Grego, J., Tasseva-Kurktchieva, M. Report.

2. "The Busuu Efficacy Study 2021”.
    Vesselinov, R.,  Grego, J., Tasseva-Kurktchieva, M., Sedaghatgoftar, N. Report.
     Executive Summary.

3. "Predictive and Psychometric Properties of the TrueNorth Test (TNT)”, 2020.
    Habing, B., Grego, J., Vesselinov, R. Report.

4. "Mango Languages Efficacy Study”, 2019.
    Vesselinov, R., Grego, J. Report.

5. "Pimsleur Efficacy Study”, 2019.
   Vesselinov, R., Grego, J. Report.

6. "The 2019 Rosetta Stone Efficacy Study”, 2019.
   Vesselinov, R., Grego, J., Sacco, S., Tasseva-Kurktchieva, M. Report.

7. "italki Efficacy Study”, 2018.
   Vesselinov, R., Grego, J. Report.

8. "Hello English Efficacy Study”, 2017.
   Vesselinov, R., Grego, J. Report.

9. "The Babbel Efficacy Study”, 2016.
   Vesselinov, R., Grego, J. Report, or Babbel site

10. "The Busuu Efficacy Study”, 2016.
   Vesselinov, R., Grego, J. Report, or Busuu site

11. "Language Zen Efficacy Study”, 2015.
   Vesselinov, R., Grego, J. Report or Language Zen site

12. “Duolingo Effectiveness Study”, 2012.
   Vesselinov, R., Grego, J. Report or Duolingo Site

13. "Measuring the Attitude and Motivation of Rosetta Stone Users", 2009.
   Vesselinov, R., Grego, J., Habing, B., Lutz, A. Report

14. "Comparative Analysis of Motivation of Different Language Learning Software”,
   (Rosetta Stone, Auralog, Berlitz), 2009.
   Vesselinov, R., Grego, J., Habing, B., Lutz, A. Report

15. "Measuring the Effectiveness of Rosetta Stone", 2009.
   Vesselinov, R. Report, or RS Site