session 2-5 Flashcards
what are three basic sensory analysis tests
Discriminative, affective, descriptive
The most important sensory attribute of the product is a type of question you may be asked in a
descriptive test
Is this product acceptable is a – type of questions
Affective
Sensory evaluation emerged as a scientific discipline in the
1940
The main objective of affective sensory test is describing product characteristics (true of false)
false
Stimulus is:
stimulus if any activator that causes a response in a receptor
Receptors are:
receptors are stimuli detecting cells of the sense organ
sensation is:
sensation is detection of a stimulus from the environment
perception is:
perception is the interpretation of sensation
masking colour is usually
unsuccessful
Trigeminal is
Trigeminal is not a part of taste or smell
how many olfactory receptors are there?
20x10^6
olfactory sensitivity range over
10^12
what precent of moderately sniffed air reaches the olfactory sensors at the back of the nasal cavity
10%
what two sensation are sensed by our trigeminal nerve
mouthfeel and carbonation
Sensory attribute are expressed as a
continuum
appearance is
an important aspect of sensory
flavour =
taste, aroma, mouthfeel
SSPR
stimulus - sensation - perception - response
1 SRM =
2.5 EBC
particles in beer invisible to the human eye are measured by light
scattering at 90 degree angle
beer gushing can be caused by
over carbonation, calcium oxalate, fusarium
Adaptation (Fatigue, Cross-adaptation and Cross-potentiation), Enhancement, Suppression and Synergy
physiological factors are:
Psychological factors are:
Psychological factors: Expectation error, Error of habituation, Stimulus error, Logical error, Halo effect, Order of sample presentation (Contrast effect, Group effect, Error of central tendency, Pattern effect, Time error/positional bias), Mutual suggestion, Lack of motivation, Capriciousness vs. Timidity
Enhancement is:
Enhancement is the effect of one substance increasing the perceived intensity of another substance presented simultaneously. the effect of one substance increasing the perceived intensity of another substance presented simultaneously.
Stimulus error is:
Psychological factors is caused by irrelevant criteria influencing the observer and suggesting difference
Decrease in sensitivity to a given stimulus as result of continued exposure to that stimulus
Adaptation
mixture suppression is:
one substance decreasing the perceived intensity of
a mixture of two or more substances
