ISO INTERNATIONAL STANDARD 6658 Third edition 2017-07 Sensory analysis - Methodology General guidance Analyse sensorielle Méthodologie - Lignes directrices générales Reference number IS0 6658:2017(E) International Organization for Standardization @ IS0 2017 vided by IHS under I No reproduction or networking permitted without license from IHS IS0 6658:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 · CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internationai ibrg DrganizationforStandardization Licensee-ZHEJIANG INST.OF STANDARDIZzRoISQ7 - All rights reserved Not for Resale, 2017/9/27 05:20:46 networking permited withoutlicense from IHS IS0 6658:2017(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 General requirements. 4.1 Basic information. .1 4.2 Statement of objectives. .2 4.3 Choice of test ..2 4.4 Choosing and training assessors 4.5 Material to be tested. .3 4.6 Testroom. ..4 4.7 Planning and conduct of the test .4 5 Test methods. .5 5.1 General. 5.2 Discrimination tests .6 5.2.1 General .6 5.2.2 Paired comparison test. .6 5.2.3 Triangle test. .7 5.2.4 Duo-trio test .8 5.2.5 Two-out-of-five test. .8 5.2.6 "A - not A" test. .9 5.2.7 Tetrad test.. 9 5.3 Use of scales and categories 10 5.3.1 Generalconsiderations ..10 5.3.2 Interpretation of results .10 5.3.3 Classification ..11 5.3.4 Grading .11 5.3.5 Ranking .11 5.3.6 Rating and scoring. .12 5.4 Descriptive tests. .. 12 5.4.1 General .12 5.4.2 Qualitative sensory profile ..13 5.4.3 Quantitative descriptive profile .13 5.4.4 Consensus profile .15 5.4.5 Free-choice profile. ..15 5.4.6 Flash profile .16 5.4.7 Deviation from reference profile ..16 5.4.8 Temporal dominance of sensations (TDS) .17 6 Analysis of results .17 6.1 General. ..17 6.2 Discrimination tests 17 6.2.1 General. ..17 6.2.2 Paired comparison test (see IS0 5495) ..18 6.2.3 Triangle test (see IS0 4120) ..19 6.2.4 Duo-trio test (see IS0 10399). ..19 6.2.5 Two-out-of-five test. .19 6.2.6 "A - not A" test (see IS0 8588) ..19 6.2.7 Tetrad test. ..19 6.2.8 Treatment of "no difference" responses in discrimination tests .19 6.2.9 Systematic effects. .20 6.2.10 Sequential approach (see IS0 16820) 20 ii Licensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS Not for Resale, 2017/9/27 05:20:46