In Qualitative Research, Size Does Matter!
In qualitative research, variety is the spice of life. Moderators are particularly sensitive to the number of participants in their groups. Some firmly believe that twelve is the right number. Others are more comfortable with eight. The reasons for these preferences include:
- CONTROLLING THE GROUP. Each moderator has their own style and way of handling group interaction. Every group has their chatterboxes, the shy ones, the negative ones, and the ones who try to take over the group for their own purposes. Each moderator knows best what works for them in maintaining a productive environment in the focus group room.
- MINIMIZING “GROUP-SPEAK”. Focus groups are frequently criticized for the phenomenon known as group-speak. Basically, group-speak happens when there is a strong participant, and the other participants simply go along with what that person is saying, rather than expressing their own opinion. A good moderator overcomes group-speak by building rapport quickly, continually monitoring the room, expertly reading body language and encouraging dissident opinions. Another way to minimize group-speak is to reduce the number of participants. It’s easier to hide in a crowd!
- HEARING ALL THE VOICES. Your moderator’s goal is to hear honest and frank opinions from every group member to strengthen the insights that result. The number of participants in the group is a key part of this equation for the moderator and – again! – every moderator knows what works best for them. Forcing a moderator to include more participants than they are comfortable with so you “get your money’s worth” is only going to result in less or poorer quality information.
Often, focus groups are not the only answer to a qualitative question, although they are very popular. You need to consider your research objectives, and at the heart of it, the type of discussion and behavior you want to understand. In qualitative research, there
are other alternatives to the traditional focus group that you should keep in mind:
- IN-DEPTH INTERVIEWS (IDIs): In person one-on-one interviews conducted at a focus group facility give you the chance to focus on the individual, avoiding the distractions of the other focus group members. After all, if it is just the moderator and the respondent, there is nowhere to hide! In-depth interviews are excellent for very sensitive or personal topics, as well as topics that typically involve individual assessment and decision making. Additionally, in-depth interviews are often used in business-to-business research where respondents may not be easily scheduled into a group, or there may be concerns about speaking openly in front of their competitors.
- DYADS AND TRIADS: Two or three people are recruited to participate in discussions at a focus group facility. Dyads and Triads are often used where the decision making process for a particular product or service is shared, such as in the case of spouses or parent-child decision making. Dyads and Triads avoid most of the weaknesses of focus groups while showcasing the interaction between the parties evaluating the topic or making the decision.
- MINI-GROUPS: Typically defined as groups with four to six participants, minigroups fill the gap between triads and full focus groups. Mini-groups are often used when the qualified participant is very rare or unique, and recruiting costs become prohibitive. Additionally, participants in mini-groups may feel more secure about offering different or dissenting opinions because there are fewer participants.
Your focus group facility should have a variety of settings to accommodate groups of all sizes in comfort and in an environment that promotes vigorous and creative discussion. The key question in deciding what size group to use is, “What are you trying to learn?” Consider your research objectives, think about how your target audience behaves, and then listen to your moderator, who will have the experience and expertise to guide the research design to meet your project needs.




Ray has spent the last thirty-five years at the intersection of innovation, technology, and market research. Ray is the Managing Director of The Future Place and is the author of The Handbook of Mobile Market Research, The Handbook of Online and Social Media Research, and editor of ESOMAR’s book Answers to Contemporary Market Research Questions. Ray is in popular demand as a conference speaker, workshop leader, writer and consultant, appearing regularly in Europe, North America, and Asia Pacific.

Amanda is the Vice President of User Experience at 352 inc., a full-service user experience, design, development, and marketing agency. At 352, she leads a team that provides user research, usability testing, and UX strategy services to clients in a variety of verticals. Amanda’s expertise and knowledge of in-person and remote research techniques has helped companies new to user experience assimilate user-centered design into their existing processes. She has a human factors background and an engineering degree from Tufts University.




Abbe Macbeth, PhD is a Regional Sales Manager for Noldus Information Technology. Taking her expertise in Behavioral Neuroscience into scientific sales in 2010, Abbe set multiple company records for sales within the first two years. Quickly moving into a managerial role, she is now responsible for overseeing four sales regions and Noldus Consulting Services, US. Abbe is passionate about behavioral research in all forms, and delights in helping others find the perfect solution to meet their needs. Abbe holds a Bachlor’s degree in Cognitive Science, a Master’s degree in Psychology, and a PhD in Behavioral Neuroscience from City University of New York.