Explanation : Survey Research is the most fundamental tool
for all quantitative research methodologies
and studies. Surveys are used to seek
responses to questions from a sample of
respondents. The various types of survey
are online polls, online surveys, paper
questionnaires, web-intercept surveys, etc.
Thematic analysis is a method of analyzing
qualitative data. It is usually applied to a set
of texts, such as interview transcripts.
Discourse analysis is a common qualitative
research method in many humanities
and social science disciplines, including
linguistics, sociology, anthropology,
psychology and cultural studies; for studying
written or spoken language in relation to its
social context. It aims to understand how
language is used in real life situations.
Case study is a qualitative research method
commonly used in social sciences. It is an
in-depth, exploratory empirical investigation/
analysis of a single individual, group, event
or phenomenon within its real-life context to
describe the causes of underlying principles.
A case study research relies on multiple
sources of evidence and benefits from the
prior development of theoretical propositions.