摘要:

ABSTRACT.Aproblem central to sensory difference testing is response bias. There are two experimental strategies for dealing with this problem. The first is to use forced choice procedures, like the common duo‐trio or triangle tests, while the second is to use signal detection measures like d′, P(A) and the R‐index. These strategies are explained and discussed. The relationship between the R‐index and the other signal detection measures is explained. The relationship between R‐index values obtained by rating and ranking is explored, as are the alternative computations of the R‐index by ranking:

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00519.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

ABSTRACT.The quality of roasted grain powders is greatly affected bythe roasting process variables; viz., initial moisture content (IMC), grain‐to‐sand ratio (GSR), sand temperature (ST) and roasting time (RT). The sensory optimization for these variables was done in two phases. The IMC (12 ± 0.2%) and GSR (1:4) were standardized in the first phase, whereas ST (215C) and RT (1.5–2.0 min), in the second. The overall quality of the roasted grain powders was found to be greatly affected by ST followed

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00520.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

ABSTRACT.R‐index measures obtained by rating and by ranking were compared using a model system. Tne prediction that R‐indices obtained by ranking should exceed values obtained by rating was confirmed for both ranking computations: RJBand R

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00521.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

ABSTRACT.A comparison of one‐way analysis of variance (ANOVA) and cluster analysis as statistical methods for selecting members of a descriptive panel was conducted. Using 150–mm unstructured line scales, 10 panelists evaluated the performance in coffee of 2 whiteners on 14 sensory attributes. Factor analysis showed that 5 factors were adequate to model the data. The sensory ballot used had a reliability coefficient omega (Ω) equal to 0.93. One‐way ANOVA and cluster analysis resulted in 2 different panels consisting of 9 judges each. Means and standard deviations of the scores showed that greater variability among panelists’ ratings resulted when the panel was selected using one‐way ANOVA than when cluster analysi

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00522.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

ABSTRACT.In their article Scriven and Mak (1991) claim to have used Generalized Procrustes Analysis (GPA) to analyze their data. However, the Consensus program they used does not perform a GPA. Since 1989 there is a very fast GPA program that runs on microprocessors.

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00523.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00524.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1992.tb00525.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY