What type of evidence do focus groups produce? Please provide the answer from th

What type of evidence do focus groups produce?
Please provide the answer from the following readings:
McDonald, P., Townsend, K &Warton, A. (2013) “The legitimation and reproduction of discourse‐practice gaps in work‐life balance”, Personnel Review, Vol. 42 Iss: 2, pp.205 – 222. Doi: http://dx.doi.org/10.1108/00483481311309384
McDowall, A. & Saunders, M. (2010). UK managers’ conceptions of training and development. European Journal of Industrial Training, 34(7), 609-630
Nicholas, H. & McDowall, A. (2012). When work keeps us apart: A thematic analysis of the experience of business travellers. Community, Work and Family, Vol. 15:3, 335-355. doi: 10.1080/13668803.2012.668346
Slutskaya, N. & Simpson, A (2012). Lessons from photo-elicitation: encouraging working men to speak. Qualitative Research in Organizations and Management, 7 (1), 16-33.