Validity and reliability quantitative research concepts

Validity and reliability are primarily quantitative research concepts. Morse, Barrett, Mayan, Olson, and Spiers (2002) argue that their exclusion from qualitative research design undermines the credibility and rigor of qualitative research conclusions. Are they correct in this assertion? Why or why not?

Please provide answer with a minimum of 150 words and a minimum of 1 reference. Reference needs to be cited in APA 6th edition format.