Practical 3 – Descriptive Test Quantitative Descriptive Analysis (QDA ®)

ASSIGNMENT 3 Information

Practical 3 – Descriptive Test

Quantitative Descriptive Analysis (QDA ®)

The practical activity involves evaluating 5 kinds of chocolate using descriptive test, specifically Quantitative Descriptive Analysis (QDA®), based on the assessment of different descriptors.

Practical 3 Data: Updated Assignment 3 Data.xlsx

Descriptors and anchors:

Visual 

Glossiness                 Matt   —  Gloomy

Colour                          Light brown  —  Black

Texture

Snapping sound      Absent  —  High

Aromas — the specific descriptors are found in the data file, the anchors for all are    Absent  —  Intense

Mouthfeel

Hardness at first bite    Very soft  —  Very hard

Taste — the specific descriptors are found in the data file, the anchors for all are    Absent  —  Intense

Mouthfeel (oily and smooth)      Absent  —  Intense

Persistence of flavours in the mouth     0 s   —   > 6 s

Perceived quality     Unacceptable   —  Excellent

 The data set is large, thus you are encouraged to divide the work within your group.  However, you must personalise presentation of final figures. 

 

 

 

 

Data analysis

The descriptive sensory data will be analysed by

(i) Comparison of means (ANOVA) between different samples, in each attribute evaluated, which will be displayed as a Spider Chart; and

(ii) Principal Component Analysis to project association of attributes and samples.

Instructions for data analysis can be found in Prac 3 updated manual. NOTE: These documents have copyrights and they are subject to plagiarism rules from UoM (Short advice: do not copy and paste any sections of the paper to answer questions in quizzes, for assignments and exam!)

Please download pdf copy of full manual here. 

Actions

Spider chart App MyAppInstaller_web.exe

PCA App MyAppInstaller_web.exe

*Note: Both files have the same name but will install different applications

ASSIGNMENT 3 Report Format and Structure

You will write a research report based on the data acquired from the QDA® of 5 chocolate samples.  The report has a 1500-word limit, which accounts for the main body texts (excludes title, figure and table contents and captions, and references).

Use APA (6th or 7th) format for citation, referencing, and general formatting guidelines (12 pt Times New Roman or 11 pt Serif fonts i.e. Calibri, Arial, Helvetica; double line spacing, and 2.54 cm margins).

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