ISO INTERNATIONAL STANDARD 9241-920 First edition 2009-03-15 Ergonomics of human-system interaction - Part 920: Guidance on tactile and haptic interactions Ergonomie de I'interaction homme-systeme Partie 920: Lignes directrices relatives aux interactions tactiles et haptiques Reference number ISO 9241-920:2009(E): @ ISO 2009 py IHS under ted without license from IHS Not for Resale ISO 9241-920:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHT PROTECTED DOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, isO's memberbody in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2009 - All rights reserved py IHS unde I without license from IHS Not for Resale ISO 9241-920:2009(E) Contents Page Foreword Introduction ..vii 1 Scope 2 Applying ISO 9241-920. 2.1 Recommendations ... 2.2 Evaluation of products.. 3 Tactile/haptic inputs, outputs, and/or combinations.... 3.1 General guidance on tactile/haptic inputs, outputs and/or combinations ... 3.1.1 Optimizing performance ... 3.1.2 Providing accessible information on tactile/haptic elements. 3.1.3 Providing contextual information .... 3.1.4 Using consistent labels ...... 3.1.5 Identifying system state... 3.1.6 Minimizing fatigue ...... 3.1.7 Providingalternative input methods.... 3.1.8 Maintaining coherence between modalities ... 3.1.9 Combining modalities ... 3.1.10 3.1.11 Isolation of individual interface elements .... 3.2 Intentional individualization .. 3.2.1 Enabling users to change modalities... 3.2.2 Enabling force feedback override..... 3.2.3 Enabling users to individualise tactile parameters 3.3 Unintentional user perceptions .. 3.3.1 Limiting acoustic output of tactile/haptic display... 3.3.2 Limiting heat gain of contact surface..... 3.3.3 Avoiding sensory adaptation ... 3.3.4 Recovering from sensory adaptation... 3.3.5 Avoiding unintended perceptual illusions.. 3.3.6 Preventing temporal masking ... 4 Attributes of tactile and haptic encoding of information ... 4.1 High level guidance on tactile/haptic encoding of information..... 4.1.1 Using familiar tactile/haptic patterns ... 4.1.2 Making tactile/haptic encoding obvious . 4.1.3 Conformityto userexpectations. 4.1.4 Using sensory substitution .. 4.1.5 4.1.6 Using tactile apparent location .... 4.1.7 Using distal body parts for high spatial resolution ... 4.1.8 Using higher addressability for trained users.. 4.1.9 Using tactile apparent motion... 4.1.10 Preventing spatial masking .. 4.2 Guidance on specific tactile/haptic attributes for encoding information. 4.2.1 Selecting dimensions for encoding information... 4.2.2 Discriminating between attribute values ....... 4.2.3 Limiting the number of attribute values.. 4.2.4 Combining properties .. 4.2.5 Limiting complexity.... 4.2.6 Encoding by object shape... .9 4.2.7 Encoding information by temporal pattern... Copyrght International Organizaionsandardizalonghts reserved ili ut license