Presentation order
How AreaCacao decides the order in which samples are served to each panelist to eliminate bias.
Why the order matters
If every panelist tastes the samples in the same order (for example, 1 → 2 → 3 → 4), the results are biased: palate fatigue builds up and the last samples always score worse than the first ones, even when they are identical.
The presentation order balances the positions to neutralize this effect.
The four options
These are the exact option names in the wizard:
Random
The system assigns each panelist a different random order, which stays the same if they reload the page mid-tasting. It reduces bias, but it balances neither position nor carryover. It's the default option.
Balanced (Williams)
A Williams balanced square distributes the samples so that each one appears the same number of times in each position and as often before as after every other sample: it balances order and first-order carryover. Ideal for 5 samples or fewer. The balance is exact when the number of panelists is a multiple of the block of orders (as many orders as samples if the number of samples is even, twice as many if it is odd); otherwise the wizard warns you that it will be approximate and tells you how many panelists would make it exact.
Cyclic Latin square
Each sample appears once in each position. It balances position and is useful with multiple panel blocks, but it doesn't balance carryover the way Williams does.
Manual
Every panelist gets the samples in the same order: the order of the sample list you set up in step 2 of the wizard. Use it only if you need a specific fixed order (for example, because of logistical constraints).
How to choose it
In Step 4 of the tasting wizard (Assessor panel), under Sample presentation order, select the method you prefer. Below the options you'll see an example diagram with 4 samples (A–D) showing how they are distributed with the chosen method. Depending on the test type, one option carries the Recommended badge:
- Balanced (Williams): descriptive, hedonic, and both ranking tests.
- Random: triangle, paired comparison, duo-trio, time-intensity, and aroma release.
How it plays out in the workshop
Each panelist's own order applies in the digital evaluation: when they open their link, each one gets the samples in their own order (except with Manual, which is the same for everyone). The printable A4 sheets and the labels follow the tasting's sample list order, the same for everyone; if you work on paper, serve each cup in the order you want to apply.