The PRICE Model: Demystifying and Actualising Data Saturation
Saturation is an analytical achievement, not a sample-size rule. Here is how to reach it — and prove it.
Researchers are routinely asked “how many interviews are enough?” — but that is the wrong question. Rule-of-thumb sample sizes cannot prove that data have been fully used, and claims of saturation are often made without specifying any criterion at all. The PRICE model relocates saturation where it belongs: in the analysis itself, achieved by iteratively refining and expanding existing quotations, keywords, codes, themes and concepts until nothing new emerges.
The five-stage PRICE model
Perspectivation
View the data from all relevant perspectives — research questions, theoretical and epistemological frameworks — to gain deeper insight.
Recapitulation
Summarise the main findings in the form of the codes and themes that have emerged from the data.
Integration
Connect and make sense of the themes and codes that have emerged from the data.
Crystallisation
Step back from the analysis and structure the connected themes and codes into figures or tables.
Edification
Show how the results contribute to the improvement of understanding of the research topic.
Inside Perspectivation: the three Vs
Perspectivation — the first and richest PRICE process — is achieved through three linguistic qualities of your quotations and keywords:
When velocity, viscosity and vibrancy are all explicitly considered in the selection of keywords and codes, the researcher can perceive the data from many viewpoints — and perspectivation, the first element of saturation, is achieved. Power quotes (“the most compelling bits of data you have”), keyword frequency across participants, and the researcher’s theoretical and epistemological lens all feed this stage.
Why this matters for your thesis or paper
Reviewers and examiners increasingly reject bare statements like “saturation was reached after 12 interviews.” The PRICE model gives you a defensible alternative: report how perspectives were exhausted (Perspectivation), how codes and themes were summarised (Recapitulation), connected (Integration), structured into figures or tables (Crystallisation), and how the final framework advances understanding (Edification). Saturation becomes something you demonstrate, not something you assert.
Naeem, M., Ozuem, W., Howell, K., & Ranfagni, S. (2024). Demystification and Actualisation of Data Saturation in Qualitative Research Through Thematic Analysis. International Journal of Qualitative Methods, 23. https://doi.org/10.1177/16094069241229777 (open access)
Frequently asked questions
How many interviews do I need to reach saturation?
There is no magic number. Saturation pertains to the comprehensiveness of the analysis rather than the size of the sample. The PRICE model lets you demonstrate saturation through the analysis itself — when no new keywords, codes or themes emerge across the five PRICE processes — which is a far stronger defence than citing a sample-size rule of thumb.
Is saturation the same in thematic analysis as in grounded theory?
No. Saturation originated in grounded theory, where it concerns the comprehensiveness of the developing theory. Applied uncritically to thematic analysis it loses precision. The PRICE model was developed specifically for saturation within thematic analysis, while drawing on grounded theory insights where relevant.
What are power quotes?
Power quotes are the most compelling pieces of data you have — the ones that effectively illustrate your points and give the reader a sense of “being there.” Choosing power quotes and proof quotes, and noting how often keywords repeat across participants, strengthens both saturation and the credibility of findings.
Can I use PRICE together with STA?
Yes — they are designed as companions. STA gives you the six analytical steps; PRICE tells you when those steps have exhausted the data’s potential, so the two frameworks together take you from raw transcripts to a saturated, defensible conceptual model.