We recommend:
when a problem requires detailed in-depth research
understanding the problem does not require knowledge of group opinion
there is no need to confront opinions
the topic is difficult, threatening or of personal nature
respondents are difficult to access - recruitment is difficult
Specificity:
one respondent and a moderator
enables the use of advanced projection techniques
time-consuming research realization and complex analysis
We recommend:
when a problem requires a fairly in-depth research
the exchange of views between respondents or their confrontation is desired (e.g. users of competitive brands)
the subject of the research concerns two people (such as a joint decision of purchase)
Specificity:
two respondents and a moderator
enables the use of advanced projection techniques
less time-consuming realization of the research compared to IDIs but longer realization than the FGI
We recommend:
when the participants are very involved in the topic of the interview and due to a smaller number of participants their statements can be longer
the topic of the research evokes strong emotions, the study involves experts in the field and each of the respondents must have the possibility to fully express his/her opinion
recruitment criteria are complicated and it is difficult to meet with a larger group at one time
Specificity:
four participants and one moderator
better contact with the participants and greater controllability than the FGI
We recommend:
when the research topic is broad, there are many issues to discuss, research problem requires collecting various information
topic is difficult, threatening or of personal nature, therefore, it is necessary to devote more time in the initial phase to establish good contact with the group
enables the use of complex and time consuming projection and assistive techniques
Specificity:
duration of 2.5-3 hours
We recommend:
when the research concerns advertising concepts
Specificity:
a series of several focus groups (5-6) with longer breaks permitting the modification of tested materials
often it is recommended to make modifications in the moderator?s guide between groups, this results from the dynamic changes in the understanding of the research problem
when we wont to analysis of brand positioning in relation to its competitors and identification of the top attributes for achieving competitive
to track even small changes in brand reputation over time and assess the effectiveness of the advertising campaigns