Facility and protocol Flashcards
What are adaptation factors?
How a body reacts and adjusts to constant stimuli
When does adaptation occur?
When exposure to a stimulus decreases responsiveness to the stimulus or other stimuli
What are carry-over effect factors?
Short term adaptation that causes change in sensitivity
What is an example of carry-over effect?
Eating a strong sweet sample, then a weak sample and not tasting sweetness
How can carry-over effect be prevented?
Breaks, palate cleanser, low number of samples
What are the 3 perceptual interactions?
Enhancement
Suppression
Physical condition
What is enhancement?
Presence of one substance increases perceived intensity of another
What is suppression?
Presence of one substance decreases perceived intensity of another
How can enhancement and suppression be avoided?
Exposure to only one stimulus
What is physical condition?
Sensory perception altered by physical changes
What are some physical changes that can change perception of stimulus?
Medication
Age
Hormonal changes
Hunger
Time of day
What is expectation error?
Information associated with the sample triggers impression to product
What is suggestion error?
Comments and noises influencing judgement
What is distraction error?
Distraction by environment or personal preoccupation
What is stimulus and logical error?
Using additional information to make a judgement
How can stimulus and logical error be avoided?
Random 3 digit codes and consistent characteristics between samples
What is halo effect?
Evaluating more than one attribute may effect another attribute
How is halo effect prevented?
Trained assessors
One attribute at a time
What is attribute dumping?
Limited choice of attributes received
What is habituation error?
Assessors scoring similar products and missing the differences in samples
How can habituation be prevented?
Varying samples
Include spiked sample
What is order effect?
Score assigned to sample based on previous products
How can order effect be avoided?
Randomising sample orders
What is central tendency error?
Assessors avoid using extreme ratings
How can central tendency error be avoided?
Wide product range
Trained scale use
What is motivation error?
Lack of motivation causing assessors to rate based on how they feel
What are the 3 main controls?
Sensory facilities
Product controls
Panellist controls
What are the controls for sensory facilities?
Size
Location
Well lit
Opaque, neutral walls
Controlled temperature
What are some product controls?
Odour-free equipment
Consistent portion size
Serving temperature
Coding
Random order of presentation
What are the panellist controls?
Training
Scheduling
Sensible personal habits
