Laddering Technique in India: Script, Sample, Cut-Off Maths

The laddering technique is a one-to-one interview that moves from a feature a person chose, to what it does for them, to why that matters in their life. The three levels are attributes, consequences and values. It fits past or current choices, not hypothetical ones.

The idea behind it is means-end theory: people choose things because features lead to consequences that serve their values. Reynolds and Gutman set out the interview and analysis method in the Journal of Advertising Research, 1988. One ladder reads: free delivery, then saves money, then budget control, then security.

This page covers soft laddering, the conversational interview. It needs a trained interviewer who follows the respondent. Hard laddering forces respondents to build ladders step by step, often through a questionnaire.

Start from the last real choice. The attribute you begin with shapes every ladder that follows, and different ways of eliciting attributes produce different sets, according to Grunert, Grunert and Sørensen (1995, working paper). A remembered purchase gives you attributes that were actually used in a decision.

Spend five minutes on warm-up, ten on picking attributes, thirty-five on climbing, and the rest on negatives and close. In a published laddering study, sessions ran 90 minutes with 45 or more spent laddering. Sixty minutes holds up to three attributes.

Rotate these probes so the interview does not sound like a loop:

• "Why does that matter to you?"
• "What does that let you do?"
• "What would it mean if you could not?"
• "What does that give you?"

Our recommendation if the respondent stalls: ask for an example from their own week, or ask what a friend would say.

Follow forks. One "why" can bring back several reasons. In an example from Grunert, Grunert and Sørensen (1995, p. 9), asking why "good taste" is important produced "it makes me feel relaxed and joyful", "my family will be pleased" and "it shows that I am a good housekeeper". Write all of them down and climb each in turn. Do not pick one for the respondent.

Stop climbing when the answer is about the person ("it makes me feel…", "my family comes first") or when the respondent repeats an earlier answer. This is our working rule. The method itself gives no fixed number of rungs.

Plan 30 to 50 interviews for a hierarchical value map, the range reported by a 2020 systematic review in the Journal of Patient Experience. For a hand-drawn sketch, our recommendation is 6 to 10 interviews, based on one 2023 library study that drew useful value hierarchies from six interviews.

Our planning model sets ladders at 2.5 per interview. That is our own planning assumption, from dividing the 125 ladders and 50 respondents in one example set-up in Reynolds and Gutman (1988). It is not a measured average. Forks add ladders.

Interview hours are interviews times minutes divided by 60. The session lengths are assumptions. Published studies range widely: one study in the 2020 review ran 15 to 78 minutes, another about 50 minutes, and the 90-minute sessions come from the study cited above. Recruiting, transcription and coding come on top. For wider guidance on numbers, see our sample size in qualitative research guide.

A cut-off is the minimum number of links between two elements that earns a line on the value map. Reynolds and Gutman (1988) report that a cut-off of 4 with 50 respondents and 125 ladders can account for as many as two-thirds of all relations, and recommend 3 to 5 for 50 to 60 respondents. In the 10-ladder example below, a cut-off of 4 keeps only 7% of relations.

To read the table below, you need two terms. An implication matrix counts how often one element leads to another. A direct link joins neighbouring rungs in a ladder. An indirect link joins elements further apart in the same ladder.

We built a small example. These 10 ladders are illustrative and invented for the method demo. They are not participant data.

1. free delivery, saves money, budget control, security
2. free delivery, saves money, family comes first, security
3. free delivery, saves money, budget control, security
4. fast delivery, saves time, more time with family, family comes first
5. fast delivery, saves time, less stress, peace of mind
6. fast delivery, saves time, more time with family, family comes first
7. fresh produce, no waste, budget control, security
8. fresh produce, healthy meals, family comes first
9. fast delivery, saves time, less stress, peace of mind
10. fresh produce, healthy meals, more time with family, family comes first

We counted every direct link (29) and indirect link (28), 57 relations in all. For each pair of elements we added direct and indirect counts, then applied the cut-off.

At a cut-off of 4, one line survives: fast delivery to saves time. A cut-off of 3 leaves six lines, and 2 leaves 20. The result comes from an invented example and will vary with real data.

Draw each respondent's ladder, group them by shared attribute, and report how many respondents sit behind each link.

Four problems recur: the interview feels like an interrogation, respondents give tidy answers, forks distort the map, and the ladders are all positive. Veludo-de-Oliveira, Ikeda and Campomar name four barriers to laddering in practice: "time-consuming and expensive interviews; artificial set of answers; researcher biases; and simplistic analysis of the results" (Qualitative Market Research, 2006).

Repetition feels like interrogation. Questions get more personal as they climb. We recommend you state the length and the repetition at the start, rotate the probes, and ask for examples. Do not force an answer. If someone cannot answer, note the question and return to it later.

Respondents give tidy answers. Some want to appear intelligent and respectable, and some answer to meet what they think the interviewer expects. We recommend asking for examples and analogies, leaving silences, using the third-person probe and promising confidentiality.

Forks distort the aggregate. In an illustration in Grunert, Grunert and Sørensen (1995, pp. 16 to 17), a sample of 30 respondents includes 25 with the ladder "good taste, then well-being" and 5 with "good taste, then function better, then well-being". The aggregate map then describes the whole group by the longer chain. Check any map against individual ladders before you report it.

Ladders skew positive. The technique usually asks about positive features and misses the negatives. The 50-to-55-minute slot in the script above fixes this. We recommend a second person code a sample of transcripts independently and compare, so one researcher's reading does not decide the map.

Recruit people who made the relevant choice recently, then interview them one to one. At Qualfacto we recruit by city and by household and demographic profile, and we check each participant's identity before inviting them. We run in-depth interviews of 30 to 120 minutes, online or in person, so the 60-minute script fits comfortably.

Write the screener around the starting choice: a purchase or use of the category within a window you set, and the ability to name what they chose. Our research screener template gives a fill-in structure. Our in-depth interview method guide covers planning and briefing.

We run sessions in languages other than English. Draft the probes in the language the respondent will use, and have a native speaker check each one. We recommend this because a literal translation of "why does that matter?" can sound blunt.

You can bring your own moderators. Deliverables depend on the scope agreed before the study starts: recordings, transcripts, structured data exports or a research report. Coding ladders needs transcripts, so agree that up front. Record only with consent, and see informed consent in research for a form and the Indian rules.

We do not work from a fixed rate card. Each project is priced from your brief, and we offer a free pilot. Email your brief to support@qualfacto.io with the research objective, target audience, city, number of interviews, language and timeline. We aim to reply within one business day (Monday to Friday, 10:00 to 18:00 Indian Standard Time).

If you would like to take part in studies as a participant, see how to join and get invited. Registration does not guarantee selection, and invitations depend on each project's requirements and your profile. Rewards, eligibility and requirements depend on each study's terms.