TAFC Test

The test uses the procedures and terms described in

Levitt H. (1971) Transformed Up-Down Methods in Psychoacoustics

Here is a list of parameters needed by the test. This table lists only the parameters that have some special information about parameters or that override or adds new parameters to the common test parameters list.

Parameter	Value	Description	R/O
class	TAFC	A class alias (TAFC) or a fully qualified java class name (guinea.logic.TAFCTest) of the class that handles the TAFC test.	Req.

The TAFC has some special parameters. Prepend parameter names with 'TAFC.' string, for example:

   # pause length is two seconds
   TAFC.pauseLength=2.0

Parameter	Value	Description	R/O
ruleType	integer	The number of the rule that decides when to turn the direction. Currently rule number 1 is implemented. Default is 1.	Opt.
answerName	questionID	The question ID to use for storing the answer. The default is 'level'.	Opt.
pauseLength	seconds	The time to answering when sample pair has played. The answer decides whether to go to the same direction or change direction (depends on the rule). Default is 2 seconds.	Opt.
initialLevel	volume	The initial volume level when this item starts. Both linear scale and dB scale can be used. Default is +0.0dB (1.0 linear).	Opt.
stepSize	volume offset	The level step size. Both linear scale and dB scale can be used. The default is 3.0dB.	Opt.
maxRuns	integer	Number of runs that is required. Default is 6.	Opt.
logTrial	true or false	Whether to log each trial and answer for this item in addition to the final level. Default is false.	Opt.
trialAnswerName	questionID	The question ID to use for the trial list of rach item if trials are logged. Default is 'trial'.	Opt.

Test item parameters

Parameter	Value	Description	R/O
B	sample ID	Sample ID of sample B.	Req.
Ref	sample ID	Sample ID of the reference sample Ref.	Req.

Here is an example of an B/Ref item:

   # which sample is the B sample
   item3.A=pirr32
   # which sample is the Ref sample
   item3.Ref=pirr44

Results