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Design of Taste Testing Trials

  • Designing good sensory experiments is a challenging problem when tasters are not able to taste samples at one sitting.
  • For example if 12 tasters receive 9 samples in duplicate they may be laid out in 3 sessions of 6.
Session 1 Session 2 Session 3
Order
 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
Taster
1
 1 2 3 6 4 5 4 5 6 9 7 8 7 8 9 3 1 2
2
 6 4 5 8 9 7 9 7 8 2 3 1 3 1 2 5 6 4
3
 8 9 7 1 2 3 2 3 1 4 5 6 5 6 4 7 8 9
4
 4 7 1 2 5 8 5 8 2 3 6 9 6 9 3 1 4 7
5
 2 5 8 9 3 6 3 6 9 7 1 4 1 4 7 8 2 5
6
 9 3 6 4 7 1 7 1 4 5 8 2 8 2 5 6 9 3
7
 5 1 9 7 6 2 6 2 7 8 4 3 4 3 8 9 5 1
8
 7 6 2 3 8 4 8 4 3 1 9 5 9 5 1 2 7 6
9
 3 8 4 5 1 9 1 9 5 6 2 7 2 7 6 4 3 8
10
 1 6 8 2 4 9 4 9 2 5 7 3 7 3 5 8 1 6
11
 2 4 9 3 5 7 5 7 3 6 8 1 8 1 6 9 2 4
12
 3 5 7 1 6 8 6 8 1 4 9 2 9 2 4 7 3 5
  • The design above is constructed so that each session is a balanced incomplete block design. Sessions may therefore be analysed individually or all at once.

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