CSA Panel Training & Management 1 — Questions and Answers
Question 1: Which screening test is most commonly used to identify color vision deficiencies in candidates before recruiting them for a sensory panel?
- Farnsworth-Munsell 100 Hue Test
- Ishihara Color Plates Test (Correct answer)
- Snellen Eye Chart
- Amsler Grid Test
Correct answer: Ishihara Color Plates Test
The Ishihara Color Plates Test is the standard initial screen for red-green color blindness, making it the most common recruitment screen for sensory panels.
Question 2: During panelist screening, a triangle test is used primarily to assess a candidate's ability to:
- Express preferences between products
- Discriminate between two similar samples (Correct answer)
- Generate descriptive vocabulary
- Rank products by overall quality
Correct answer: Discriminate between two similar samples
The triangle test presents three samples (two identical, one different) and measures whether a candidate can reliably identify the odd sample, indicating basic discrimination ability.
Question 3: In sensory panel recruitment, a detection threshold test is conducted primarily to determine:
- A candidate's hedonic sensitivity to sweetness
- The minimum stimulus concentration a candidate can perceive (Correct answer)
- Whether a candidate can rank flavors in order of intensity
- A candidate's preference for specific product categories
Correct answer: The minimum stimulus concentration a candidate can perceive
Threshold testing establishes the lowest concentration at which a stimulus can be detected, helping ensure recruits have adequate sensory sensitivity for the target attribute.
Question 4: The 'halo effect' in sensory panel training refers to:
- Improved panelist performance after long-term training
- The tendency for overall product impression to bias ratings of individual attributes (Correct answer)
- A positive mood effect that increases panelist engagement
- The adaptation to high-intensity stimuli that reduces sensitivity over time
Correct answer: The tendency for overall product impression to bias ratings of individual attributes
The halo effect occurs when a panelist's global impression (positive or negative) bleeds into ratings of specific attributes, reducing their independence and accuracy.
Question 5: The primary purpose of 'anchoring' a rating scale during descriptive panel training is to:
- Prevent panelists from using extreme values at the ends of the scale
- Define specific sensory intensities at scale reference points using physical or chemical standards (Correct answer)
- Ensure all panelists use the same number of scale intervals
- Randomize which end of the scale corresponds to high intensity
Correct answer: Define specific sensory intensities at scale reference points using physical or chemical standards
Anchoring ties specific points on the scale to real physical or chemical references, so all panelists interpret intensity levels the same way.
Question 6: Which descriptive analysis method trains panelists using a universal, pre-established vocabulary in which each attribute and intensity level is defined by specific physical reference standards?
- Quantitative Descriptive Analysis (QDA)
- Free-choice profiling
- Spectrum™ Descriptive Analysis (Correct answer)
- Flash profiling
Correct answer: Spectrum™ Descriptive Analysis
The Spectrum™ method uses absolute, universal scale references developed by Meilgaard and colleagues so that panelists across laboratories can use a common sensory language.
Question 7: To minimize carry-over effects between samples during a sensory panel session, the most effective procedure is to:
- Present all samples simultaneously so panelists can compare directly
- Provide water and appropriate palate cleansers between sample evaluations (Correct answer)
- Reduce the number of attributes assessed per session
- Increase the volume of each sample served
Correct answer: Provide water and appropriate palate cleansers between sample evaluations
Palate cleansers such as water, unsalted crackers, or apple slices help clear residual flavors between samples and reduce adaptation and carry-over effects.
CSA Panel Training & Management 1
Which screening test is most commonly used to identify color vision deficiencies in candidates before recruiting them for a sensory panel?