ETR 261-5 : 20001

Foreword
Introduction
1 Scope
2 References
3 Definitions, symbols and abbreviations
4 Experimental design
  4.1 Introduction
  4.2 Subjects
  4.3 Materials
  4.4 Context
  4.5 The Pilot Study
  4.6 The Main Study
5 Results
  5.1 Introduction
  5.2 Were the subject groups homogeneous?
  5.3 What performance and preference differences were there,
      if any, between the CEPT and GSM schemes?
  5.4 Is there any effect, positive or negative, from learning
      both schemes?
  5.5 What type of errors were subjects making?
  5.6 What level of usability/learnability is achievable with
      the current code schemes?
6 Conclusions
  6.1 General
  6.2 Training materials
  6.3 Test materials
  6.4 The results
Annex A: Sample Training Booklet for CEPT scheme
Annex B: Opinion Questionnaire
Annex C: Sample Quiz for CEPT Code Scheme
Annex D: General Instructions
History

States the results of the research work conducted to develop a European Telecommunication Standard (ETS) defining a harmonized minimum man-machine interface (MMI) for the access and control of public network based telecommunications services, and in particular supplementary services.