ASTM-E2082:12(R2020) pdf free download – Standard Guide for Descriptive Analysis of Shampoo Performance.
7.3.2 Prior to completing a screening questionnaire, the time commitment for training (orientation and practice sessions), potential duration of the panel, panel objectives, and assessor commitment should he discussed with each candidate. In addition, in the case of a cosmetologist assessor, the differences between conduct and responsibilities as a trained evaluator and those of a cosmetologist should be emphasized.
7.3.3 A screening questionnaire is recommended (refer to 7.2.3.1).
7.3.4 Select 15 to 20 assessors. This number may vary depending on the complexity of the test and the skill of the assessors. The following criteria may be used as a guideline. Other approaches are described in ASTM MNL13 and ASTM STP758.
7.3.4. 1 S(reening Questionnaire:
(I) Availability for the complete orientation and 80—I0() % of the training practice sessions.
(2) No health-related problems, such as, skin irritations, central nervous system disorders, or medications which might interfere with the central nervous system or reduce skin and muscle activity.
(3) Correct and comprehensive descriptive answers to 75 % or more of the open-ended tactile questions in the screening questionnaire.
(4) Correct rating of 80 % or more of the scaling exercises in the screening questionnaire (see Figs. 1 and 2).
7.3.4.2 Interview—Each candidate should be interviewed by the panel administrator or trainer to determine attitude, interest, and ability to learn and work in a group situation. The candidate should demonstrate good verbal skills, a high interest in descriptive dynamics, and a cooperative yet confident personality (see Table 3).
7.4 Trained Panc’I Orientationlfraining:
7.4.1 The panel trainer needs to orient assessors first to the general concepts, such as, the definition, components. and application of descriptive analysis testing. This will take approximately two hours.
7.4.2 Assessors are introduced to the need for strictly controlled sample application procedures and for the careful definition of each sensory attribute. This will take approximately two hours.
7.4.3 A discussion and demonstration of each attribute is conducted at each stage of the evaluation. This establishes the overall structure of the descriptive analysis of hair-care properties. Assessors are encouraged to discuss each term, its definition, the evaluation procedure(s), and the corresponding rating scale after they arc demonstrated by the panel trainer. The time involved completing this step depends on the number of attributes selected and the length of discussions. See Section 9 for suggested procedures and attributes.
7.4.4 For each attribute, the procedure, definition, and scale are discussed again in greater depth. Each is demonstrated again with three references when possible. References should represent the full intensity range from none to high. The time involved completing this step will again depend Ofl the number of attributes selected.