This collection of articles highlights all content published across the plos journals relating to the covid 19 pandemic in 2019 20 plos is committed to disseminating research as quickly as possible particularly in public health emergencies all articles published in any plos journal are open access free of charge to all readers. Research or longitudinal research in the former case the rese arch is con fine d to a single time period whereas in the latter case the research is carried on over several time periods. Alan bryman social research methods 4th edition oxford university press 2012pdf. Task analysis refers to the broad practice of learning about how users work ie the tasks they perform to achieve their goals task analysis emerged out of instructional design the design of training and human factors and ergonomics understanding how people use systems in order to improve safety comfort and productivity. In this paper an attempt has been taken to study the background of the qualitative research methodology in social sciences and some other related subjects along with the importance and main
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