In Depth Interview: Thailand Market Research Guide

Table of Contents

• What Is an In Depth Interview in Market Research?
• The In Depth Interview Method Explained
• In Depth Interview Sample Size: How Many Are Enough?
• In Depth Interview vs Survey: When to Use Each
• In Depth Interview Questions: Best Practices
• Conducting In Depth Interviews in Thailand: Cultural Considerations
• Industry Applications
• Analysis and Reporting
• Case Studies in Southeast Asia
• Why Choose Iconic Research for In Depth Interviews
• Conclusion
• Sources

What Is an In Depth Interview in Market Research?

In Thailand’s dynamic and culturally rich market, gaining a deep understanding of consumer motivations, behaviors, and emotional drivers is essential for businesses seeking long-term success [1]. With rapidly evolving digital landscapes and diverse regional preferences, surface-level data often falls short.

In depth interviews (IDIs) in market research offer a powerful solution [2]. Unlike surveys, which deliver breadth, IDIs deliver depth—one-on-one conversations that uncover authentic insights and hidden drivers. Together with focus groups, the in depth interview method has become a cornerstone of qualitative research in Thailand, helping companies generate actionable intelligence tailored to this unique marketplace.

So, what is an in depth interview? An in depth interview is a qualitative research method involving one-on-one conversations between a trained interviewer and a participant [2]. These interviews use open-ended, exploratory questioning to elicit detailed narratives about experiences, beliefs, feelings, and intentions.

Unlike surveys, which prioritize standardization, in depth interviews in qualitative research provide context—the “why” behind consumer decisions, emotional triggers, and cultural influences shaping behavior. They are particularly useful for sensitive topics, new product concepts, or exploring complex consumer journeys.

The In Depth Interview Method Explained

The in depth interview method typically follows a structured but flexible process:

Preparation and Design – Define research objectives and create a semi-structured interview guide with open-ended questions [4].

One-on-One Interviewing – Engage participants conversationally, adapting questions to explore emergent themes.

Rapport Building – Establish trust through respect and warmth [4].

Probing Techniques – Ask follow-ups such as “Can you tell me more about that?” or “How did that make you feel?”

Cultural Sensitivity – Adapt tone, phrasing, and body language to suit Thai norms [5].

Cultural Adaptation in Thailand

Thai culture values indirect communication, politeness, and “saving face” [6]. Interviewers must use indirect questioning and build rapport early to encourage candid responses. Moderators fluent in Thai language and cultural nuances greatly enhance the depth and authenticity of collected insights [7].

In Depth Interview Sample Size: How Many Are Enough?

A common question in market research is: What is the right in depth interview sample size?

Unlike surveys, IDIs are not about statistical representativeness but about saturation—the point at which additional interviews yield no new insights [3][8]. Typically, 10–30 consumer interviews are sufficient, while expert or B2B projects may require fewer.

This flexibility allows IDIs to deliver meaningful depth even with smaller sample sizes, making them ideal for exploratory projects in Thailand’s diverse market.

In Depth Interview vs Survey: When to Use Each

Businesses often wonder about in depth interview vs survey approaches. Here’s a comprehensive comparison:

Use IDIs when you need context and emotional understanding. Use surveys when you need numbers and validation. Many projects in Thailand benefit from combining both approaches.

In Depth Interview Questions: Best Practices

Effective in depth interview questions are designed to uncover motivations without bias [4]. Best practices include:

• Open-ended: “Can you describe your experience with…?”
• Probing: “Why do you think that happened?” “What led you to feel that way?”
• Neutral phrasing: Avoid leading the participant. Instead of “Did you like the product?” ask “What are your thoughts on the product?”
• Contextual focus: Encourage storytelling about behaviors, routines, and motivations [2].

Allowing silence after questions often encourages deeper reflection and more authentic responses.

Conducting In Depth Interviews in Thailand: Cultural Considerations

Hierarchy and Respect

Thailand’s hierarchical culture means participants may hesitate to criticize openly [6]. A respectful, humble approach paired with confidentiality assurances is essential.

Indirect Communication and Saving Face

Disagreement is often expressed subtly [7]. Moderators trained to read non-verbal cues and use indirect questioning gain more honest responses [5].

Translation and Language Nuance

Accurate translation is critical. Local idioms and politeness conventions can affect meaning, so moderators fluent in Thai are essential [6].

Industry Applications

In depth interviews provide valuable insights across diverse sectors in Thailand’s economy:

Consumer Goods: Testing product preferences and usage behaviors.

Fintech: Exploring trust and adoption barriers in rural communities.

Healthcare: Understanding patient experiences to improve care delivery.

Real Estate: Identifying purchase drivers and lifestyle needs.

Tourism & Hospitality: Uncovering traveler motivations and service expectations.

Education: Exploring learning preferences and institutional choice factors.

Automotive: Understanding vehicle purchase decisions and brand perceptions.

Food & Beverage: Testing new concepts and cultural taste preferences.

Retail: Mapping customer journeys and shopping behaviors.

Technology: Evaluating user experience and adoption challenges.

Manufacturing: Understanding B2B decision-making processes and supplier relationships.

Analysis and Reporting

Interview transcripts are coded into themes using qualitative analysis software or manual methods. Analysts look for recurring patterns that explain consumer motivations and barriers. These insights are then translated into actionable recommendations for product innovation, marketing, or customer experience design.

Case Studies in Southeast Asia

📱 Enhancing a Mobile Banking App

A leading Thai bank needed to improve its mobile app after rising user complaints and poor store reviews. Through one-on-one in depth interviews with a diverse mix of customers, we explored pain points in usability, navigation, and trust. The in depth interview method revealed not only technical frustrations but also emotional drivers behind digital banking confidence. These insights directly guided design improvements, reducing support calls and boosting user satisfaction.

🏠 Decoding Thai Homebuyers’ Journeys

An online real estate platform wanted to understand how Thais make property decisions in a rapidly shifting market. Using a mix of mini group discussions and in depth interviews in qualitative research, we uncovered buyers’ expectations—from richer property videos and virtual tours to sharper comparison tools. The study also highlighted a rising appetite for co-living among younger professionals, alongside enduring priorities of location and price. These findings shaped both product upgrades and sharper marketing strategies.

🧺 Mapping Thailand’s Laundromat Boom

A client evaluating entry into the Thai laundromat sector needed clarity on growth potential and winning models. Our research combined market mapping with in depth interviews with laundromat owners, revealing why convenience-driven lifestyles are fueling expansion. With an appropriate in depth interview sample size of industry experts and consumers, we identified the most viable service formats, pricing strategies, and differentiators in a fragmented but fast-growing industry. The results gave the client a clear path to position itself confidently in a competitive landscape.

Why Choose Iconic Research for In Depth Interviews

🎯 Expert Interview Specialists

Our experienced interviewers are fluent in English and deeply understand Thai cultural nuances, ensuring comfortable one-on-one conversations that extract authentic insights. For specialized sectors, we maintain a network of expert moderators with industry-specific knowledge who excel at building rapport and trust. Additionally, we often conduct interviews and focus groups personally, bringing firsthand experience to some projects – you can see our hands-on moderation approach in action here.

🏢 Flexible Research Solutions

We offer both in-person interviews at professional facilities across Thailand and remote video sessions that reach participants nationwide, accommodating different budget requirements and geographic needs.

💻 Digital Interview Excellence

Our team has mastered online in depth interviews and hybrid approaches that maintain personal connection while expanding reach across Thailand’s diverse regions without compromising insight quality.

🏆 Cross-Industry Expertise

With extensive experience across multiple sectors, Iconic Research delivers comprehensive interview analysis and actionable recommendations tailored to your specific business challenges.

📈 Proven Impact

Return on investment becomes clear when in depth interview insights guide product development, refine marketing strategies, or prevent costly market entry mistakes in Thailand’s complex consumer landscape.

Conclusion

In today’s competitive market, in depth interviews are indispensable for uncovering the motivations and emotions driving Thai consumers. Their ability to reveal authentic, culturally nuanced insights makes them a cornerstone of qualitative research in Thailand.

For organizations seeking growth in Southeast Asia, partnering with professional researchers skilled in in depth interview methods ensures accurate recruitment, sensitive moderation, and actionable analysis.

Ready to unlock deeper consumer insights? Contact Iconic Research to conduct culturally adapted in depth interviews that unlock meaningful consumer insights and give your business a competitive edge in Thailand.

Frequently Asked Questions

What is an in depth interview in market research?

An in depth interview is a one-on-one, open-ended conversation designed to uncover detailed insights into consumer motivations, behaviors, and emotions.

How many interviews are enough for qualitative research?

Most projects reach saturation with 10–30 interviews, though smaller studies may need fewer, especially in B2B contexts.

In depth interview vs survey: which is better?

Neither is better—they serve different purposes. IDIs give depth and context, while surveys give breadth and validation. Many studies use both methods together.

What types of questions work best in in depth interviews?

Open-ended, probing, and neutral questions that encourage storytelling and reflection are most effective.

Why are in depth interviews important in Thailand?

Thailand's cultural context—hierarchy, indirect communication, and emphasis on saving face—makes IDIs especially valuable for drawing out candid, nuanced insights.

How long does each in depth interview session last?

Individual sessions typically run 45-90 minutes, allowing sufficient time for rapport building and deep exploration of topics.

Can in depth interviews be conducted online?

Yes, digital platforms enable remote interviews while maintaining the personal connection essential for quality insights, especially useful for reaching participants across Thailand's regions.

Sources

[1] Thailand Industry Outlook 2025-2027 | Bank of Ayudhya (Krungsri)
https://www.krungsri.com/en/research/industry/summary-outlook/Thailand-industry-outlook-summary-2025-2027

[2] Example of In-Depth Interview for Market Research | Insight7
https://insight7.io/example-of-in-depth-interview-for-market-research/

[3] Sample Size and Sampling in Qualitative Research | Phranakorn Rajabhat University
https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/151135

[4] Best Practices for Conducting In-Depth Interviews | Insight7
https://insight7.io/best-practices-for-conducting-in-depth-interviews/

[5] Cultural Issues in Conducting Interviews in Qualitative Research | ThaiJO
https://he02.tci-thaijo.org/index.php/JMARD/article/view/268107

[6] Excelling in Business Communication in Thailand | Focus Audit Tool
https://focusaudits.eu/excelling-in-business-communication-in-thailand-a-guide-to-cultural-appropriateness/

[7] How Thai, Japanese, and Western Work Cultures Differ | JacksonGrant
https://www.jacksongrant.io/news/cross-cultural-understanding/

[8] Sample Sizes for Saturation in Qualitative Research | ScienceDirect
https://www.sciencedirect.com/science/article/pii/S0277953621008558

[9] In-Depth Interviews in Market Research [2025 Guide] | Drive Research
https://www.driveresearch.com/market-research-company-blog/what-are-idis-in-depth-interviews-market-research/

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• Research Methodologies