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<p class="MsoBodyText"><span lang="EN-GB">This document specifies a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is statistically less efficient than the triangle test (described in ISO 4120) but is easier to perform by the assessors.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is applicable even when the nature of the difference is unknown (i.e. it determines neither the size nor the direction of difference between samples, nor is there any indication of the attribute(s) responsible for the difference). The method is applicable only if the products are fairly homogeneous.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is effective for:</span></p>
<ul>
<li class="ListNumber1"><span lang="EN-GB">determining that either:</span>
<ul>
<li class="MsoListNumber2"><span lang="EN-GB">a perceptible difference results (duo-trio testing for difference); or</span></li>
<li class="MsoListNumber2"><span lang="EN-GB">a meaningful perceptible difference does not result (duo-trio testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage;</span></li>
</ul>
</li>
<li class="ListNumber1"><!--[endif]--><span lang="EN-GB">selecting, training and monitoring assessors.</span></li>
</ul>
<p class="MsoBodyText"><span lang="EN-GB">Two forms of the method are described:</span></p>
<ul>
<li class="MsoBodyText"><span lang="EN-GB">the constant-reference technique, used when one product is familiar to the assessors (e.g. a sample from regular production);</span></li>
<li class="MsoBodyText"><span lang="EN-GB">the balanced-reference technique, used when one product is not more familiar than the other.</span></li>
</ul>
Reģistrācijas numurs (WIID)
88370
Darbības sfēra
<p class="MsoBodyText"><span lang="EN-GB">This document specifies a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is statistically less efficient than the triangle test (described in ISO 4120) but is easier to perform by the assessors.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is applicable even when the nature of the difference is unknown (i.e. it determines neither the size nor the direction of difference between samples, nor is there any indication of the attribute(s) responsible for the difference). The method is applicable only if the products are fairly homogeneous.</span></p>
<p class="MsoBodyText"><span lang="EN-GB">The method is effective for:</span></p>
<ul>
<li class="ListNumber1"><span lang="EN-GB">determining that either:</span>
<ul>
<li class="MsoListNumber2"><span lang="EN-GB">a perceptible difference results (duo-trio testing for difference); or</span></li>
<li class="MsoListNumber2"><span lang="EN-GB">a meaningful perceptible difference does not result (duo-trio testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage;</span></li>
</ul>
</li>
<li class="ListNumber1"><!--[endif]--><span lang="EN-GB">selecting, training and monitoring assessors.</span></li>
</ul>
<p class="MsoBodyText"><span lang="EN-GB">Two forms of the method are described:</span></p>
<ul>
<li class="MsoBodyText"><span lang="EN-GB">the constant-reference technique, used when one product is familiar to the assessors (e.g. a sample from regular production);</span></li>
<li class="MsoBodyText"><span lang="EN-GB">the balanced-reference technique, used when one product is not more familiar than the other.</span></li>
</ul>
