I used the following scale to measure oral performance. I hope you find this useful. You might also be interested in my research on communication.
Regards,
Mohammad Jahangiri
Foreign Language Oral Skills Evaluation Matrix (FLOSEM)
· Jahangiri, M. , Rajab, A. B. , Jahangiri, A., Honarvar, A. & Sharif, H. R. (2014). Disambiguating the Relationship between Language Learning Anxiety (LLA) and Oral Performance: A Reconceptualization of Facilitative vs. Debilitative Anxieties, Journal of Psychiatry. (IF=0.871).
· Jahangiri M. & Rajab A. B. (2014c). Language Learning Anxiety (LLA) and Gender. Proceedings of LSP-GABC Conference, Kuching, Malaysia. 27-29 May 2014.
· Jahangiri M. & Rajab A. B. (2014 d). Anxietal Oral Performance: Clarifying the Anxiety-Achievement Relationship, Proceedings of the LSP-GABC Conference, Kuching, Malaysia, 27-29 May 2014.
· Jahangiri M. & Rajab A. B. (2014), Development of the Anxiety Questionnaire (AQ): the Facilitating Anxiety Perspective. Aust. J. Basic & Appl. Sci., 8(2): 321-330, 2014
· Jahangiri M. & Rajab A. B. (2014). Defining Facilitative Anxiety in Strategic Terms: A Delphi Study. J Am Sci. 10 (1): 74-80.