Test types
A variety of test types has been implemented including:
- A/B: Test in which
the test subject chooses one out of two samples played to
him/her.
- A/B/X: Test in which
the sample X is the same sample as A or B. Subject chooses which
one sample X is.
- A/B/C: Test in which
A is the reference sample and the subject chooses how much
samples B and C (one of which is the same sample as A) resemble
the reference sample A. (Actually this test is referred as a
Ref/A/B-test).
- A/B Scale: An
A/B test in which subject gives an answer for both samples on a
scale specified by the test creator.
- A/B Scale, Fixed
Reference: A test in which subject gives an answer
how sample compares to a reference.
- A/B Scale, Hidden
Reference: A test in which subject gives an answer
for both samples on a scale specified by the test creator. One
of the samples A or B is the hidden reference.
- Single Stimulus: A
Test in which a single stimulus signal is played and then
graded.
- TAFC (Two
alternatives forced choice): Test in which two samples are
played altering some parameter until the subject can no longer hear
the difference between the samples.
- SSMS (Single
Stimulus Mixed Source)
- Generic test: A generic
test type.
Additional options and features for most tests:
- Multiple answers: All tests can include
additional questions. Questions (answers) can be choices and
grades (configurable).
- Free or fixed
sequence: The sample sequence can be fixed (freely
configurable with multiple samples and pauses between samples)
or free where the subject selects in which order samples are
played.
- Time limit for answering:
A timeout can be set to limit the time the subject has for
giving the answers for a test item. Without a timeout the
subject can have as much time as he needs to decide the answers.
With a timeout, the test goes to the next item when the time
ends.
- Parallel switching:
Normally when the subject switches to another sample, the
currently playing sample stops and the another starts from
beginning. In parallel mode the switching to another sample is
done by cross-fading to the other sample and does not just jump to
the start to the beginning to the sample. Useful in test where
long samples are compared. Parallel switching is only usable
for free sequence tests.
- MCLL setting:
The most comfortable listening level can be fixed by the tester
or is set by the subject within the volume range defined by the
tester.
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Last modified: Wed Jul 28 16:20:01 EEST 1999