EN ISO 5495:2007/A1:2016

Sensory analysis - Methodology - Paired comparison test (ISO 5495:2005/Amd 1:2016)

This International Standard describes a procedure for determining whether there exists a perceptible sensory difference or a similarity between samples of two products concerning the intensity of a sensory attribute. This test is sometimes also referred to as a directional difference test or a 2-AFC test (Alternative Forced Choice). In fact, the paired comparison test is a forced choice test between two alternatives. The method is applicable whether a difference exists in a single sensory attribute or in several, which means that it enables determination of whether there exists a perceptible difference concerning a given attribute, and the specification of the direction of difference, but it does not give any indication of the extent of that difference. The absence of difference for the attribute under study does not signify that there does not exist any difference between the two products.

Sensorische Analyse - Prüfverfahren - Paarweise Vergleichsprüfung (ISO 5495:2005/Amd 1:2016)

Analyse sensorielle - Méthodologie - Essai de comparaison par paires (ISO 5495:2005/Amd 1:2016)

Senzorična analiza - Metodologija - Preskus s primerjavo v parih (ISO 5495:2005/Amd 1:2016)

Ta mednarodni standard opisuje postopek za ugotavljanje, ali obstaja zaznavna senzorična razlika oz. podobnost med vzorci dveh izdelkov v smislu intenzitete senzorične lastnosti. Ta preskus se včasih imenuje tudi preskus usmerjene razlike ali preskus 2-AFC (metoda prisilne izbire). Preskus s primerjavo v parih je pravzaprav preskus z uporabo metode prisilne izbire med dvema alternativama. Metoda se lahko uporablja, če obstaja razlika v eni ali več senzorskih lastnostih; to pomeni, da je mogoče ugotoviti, ali obstaja zaznavna razlika, ki zadeva podano lastnost, ter določiti smer razlike, pri čemer podatek o obsegu razlike ni na voljo. Odsotnost razlike za lastnost, ki se preučuje, ne pomeni, da med izdelkoma ne obstaja nobena razlika.

General Information

• Status: Published
• Publication Date: 15-Mar-2016
• Withdrawal Date: 29-Sep-2016
• ICS: 67.240 - Sensory analysis
• Technical Committee: CEN/SS C01 - Food products
• Drafting Committee: CEN/SS C01 - Food products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 16-Mar-2016
• Completion Date: 16-Mar-2016
• Ref Project: SIST EN ISO 5495:2007/A1:2016 - Sensory analysis - Methodology - Paired comparison test (ISO 5495:2005/Amd 1:2016)

Relations

• Amends: EN ISO 5495:2007 - Sensory analysis - Methodology - Paired comparison test (ISO 5495:2005 and ISO 5495:2005/Cor 1:2006)
• Effective Date: 17-Sep-2014

Overview

EN ISO 5495:2007/A1:2016 (CEN) is an amendment to the paired comparison test methods used in sensory analysis. This document updates the European adoption of ISO 5495 and clarifies procedures for analysis and interpretation of paired-comparison results. The amendment provides practical examples showing how to compute proportions, standard errors and confidence limits for one-sided and two-sided tests, and it highlights conventions used in similarity testing.

Keywords: paired comparison, sensory analysis, confidence limits, proportion of distinguishers, similarity test, EN ISO 5495.

Key Topics

• Scope and status: Amendment A1 modifies EN ISO 5495:2007 and was approved by CEN in 2016.
• Analysis & interpretation: The amendment replaces Annex B.5.2 and provides worked examples (for instance n = 30, x = 21; n = 44, x = 32; n = 120, x = 67) illustrating how to calculate the sample proportion, standard error and one- or two-sided confidence limits.
• One-sided and two-sided tests: Examples show how to interpret one-sided lower confidence limits (e.g., concluding a minimum difference) and two-sided intervals (estimating a range for the proportion of distinguishers).
• Similarity testing convention: For two-sided paired similarity tests, x is chosen as the maximum of the two choice counts regardless of which sample was chosen most frequently; only the upper limit may be required for comparing to a pre-established critical proportion.

Applications

This standard is directly applicable to food product developers, sensory laboratories, quality assurance teams and researchers who need robust, standardized methods to:

• Detect and quantify sensory differences between product formulations or processing variants.
• Assess whether two products are sufficiently similar for interchangeability or acceptability decisions.
• Estimate the proportion of a target population able to distinguish samples, with stated confidence.

Practical value:

• Enables consistent reporting of paired-comparison outcomes across laboratories and jurisdictions.
• Supports decision thresholds (e.g., critical p for similarity) with formal confidence limits.
• Provides worked examples that guide analysts in computing and interpreting results.

Related Standards

• ISO 5495:2005 - Sensory analysis - Methodology - Paired comparison test (original international text).
• EN ISO 5495:2007 - European adoption prior to Amendment A1.
• ISO/TC 34 (Food products), Subcommittee SC 12 (Sensory analysis) - technical committee responsible for the standard.

For implementation, follow the procedures and example calculations provided in the amendment when designing tests, computing confidence limits and making similarity or difference decisions in sensory studies.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2016
6HQ]RULþQDDQDOL]D0HWRGRORJLMD3UHVNXVVSULPHUMDYRYSDULK,62
$PG
Sensory analysis - Methodology - Paired comparison test (ISO 5495:2005/Amd 1:2016)
Sensorische Analyse - Prüfverfahren - Paarweise Vergleichsprüfung (ISO
5495:2005/Amd 1:2016)
Analyse sensorielle - Méthodologie - Essai de comparaison par paires (ISO
5495:2005/Amd 1:2016)
Ta slovenski standard je istoveten z: EN ISO 5495:2007/A1:2016
ICS:
67.240 6HQ]RULþQDDQDOL]D Sensory analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5495:2007/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 67.240
English Version
Sensory analysis - Methodology - Paired comparison test
(ISO 5495:2005/Amd 1:2016)
Analyse sensorielle - Méthodologie - Essai de Sensorische Analyse - Prüfverfahren - Paarweise
comparaison par paires (ISO 5495:2005/Amd 1:2016) Vergleichsprüfung (ISO 5495:2005/Amd 1:2016)
This amendment A1 modifies the European Standard EN ISO 5495:2007; it was approved by CEN on 15 January 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5495:2007/A1:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5495:2007/A1:2016) has been prepared by Technical Committee ISO/TC 34
“Food products”.
This Amendment to the European Standard EN ISO 5495:2007 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by September 2016,
and conflicting national standards shall be withdrawn at the latest by September 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 5495:2005/Amd 1 2016 has been approved by CEN as EN ISO 5495:2007/A1:2016
without any modification.
INTERNATIONAL ISO
STANDARD 5495
Third edition
2005-11-15
AMENDMENT 1
2016-02-15
Sensory analysis — Methodology —
Paired comparison test
AMENDMENT 1
Analyse sensorielle — Méthodologie — Essai de comparaison par
paires
AMENDEMENT 1
Reference number
ISO 5495:2005/Amd.1:2016(E)
©
ISO 2016
ISO 5495:2005/Amd.1:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
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