Case Study is used when a researcher wants to study a group of

people to gain a larger understanding of their lives or specific aspects of their lives.

Grounded Theory is used to identify phenomena and focus on

subjective experiences and understanding the structure of those lived experiences.

Ethnographic is used to describe, in-depth, the common

characteristics of the phenomena that have occurred.

Case studies are believed to have rooted in several disciplines,

including science, education, medicine, and law.

Case studies are to be used when (1) the researcher wants to focus

on how and why, (2) the behavior is to be observed, not manipulate subjects in most

studies.

Biographical or Narrative research, researchers describe the lives of

individuals, collect and tell stories about people’s lives, and write narratives of individual

experiences.

As a distinct form of qualitative research, a narrative typically focuses

on studying many persons.

A Non-Probability Sampling scheme is one in which every unit in the

population has a chance (greater than zero) of being selected in the sample, and this

probability can be accurately determined.

Stratified Random Sampling is the purest form of probability sampling.

Assures each element in the population has an equal chance of being included in the

sample. Random number generators.

Random sampling relies on arranging the target population according

to some ordering scheme and then selecting elements at regular intervals through that

ordered list.

Convenience Sampling. Sometimes known as grab or opportunity.

Purposive Sampling. The researcher chooses the sample based on

who they think would be appropriate for the study.

Snowball sampling. The sampling procedure in which the initial

respondents are chosen by probability or non-probability methods, and then additional

respondents are obtained by information provided by the initial respondents. Also called

the referral system.

Grounded theory is a systematic procedure of data analysis. It allows

researchers to develop a theory that explains a specific phenomenon.