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An online focus group is one type of focus group, and is a sub-set of online research methods. [1] They are typically an appropriate research method for consumer research, business-to-business research and political research.
In sociology and statistics research, snowball sampling [1] (or chain sampling, chain-referral sampling, referral sampling [2] [3]) is a nonprobability sampling technique where existing study subjects recruit future subjects from among their acquaintances. Thus the sample group is said to grow like a rolling snowball.
[5] According to Powell et al., a group of individuals selected and gathered by researchers to discuss and comment on, from personal experience, the topic that is the subject of the research form a focus-group. [6] Some of the features of focus-group discussions include each member's participation, a number of consecutive meetings, common ...
Focus groups first started in the 1940s as a research method in the context of market research concerning radio soap operas. [9] During the Second World War, Robert K. Merton set out to analyze the effectiveness of propaganda with the use of focus groups. [10]
In consumer research, a range of qualitative methods are used, particularly in-depth interviews, focus groups and ethnographic observation. [8] In B2B research, focus groups and ethnographic observation are used far less frequently due to the nature of business decision-makers, and in-depth interviews are most frequently used in B2B research: [9]
Panel sampling is the method of first selecting a group of participants through a random sampling method and then asking that group for (potentially the same) information several times over a period of time. Therefore, each participant is interviewed at two or more time points; each period of data collection is called a "wave".
However, time sampling is not useful if the event pertaining to the research question occurs infrequently or unpredictably, because one will often miss the event in the short time period of observation. In this scenario, event sampling is more useful. In this style of sampling, the researcher lets the event determine when the observations will ...
The table shown on the right can be used in a two-sample t-test to estimate the sample sizes of an experimental group and a control group that are of equal size, that is, the total number of individuals in the trial is twice that of the number given, and the desired significance level is 0.05. [4]