Different ways to measure psychophysics data

Yes/No task bias:

contains bias, because eventually participants may be guided by personal expectation rather than being forced to make a guess.

yes/no theshold

around 50%

Yes/No is a ____ task

detection; 1 presentaion per trial

Forced choice bias:

less bias because participants are forced to guess

Forced choice theshold:

set to around halfway between the guessing rate and 100%


so it would be like 75% for 2AFC (2 choices)

Forced Choice is a _____ task

discrimination; choosing between multiple options

Method of Adjustment

Adjustments made by participants to their absolute threshold or PSE

PSE

Point of subjective equality; magnitude of one stimulus which is perceived equal to another stimulus

Method of Limits

A psychophysical method where stimuli are presented in ascending or descending order to determine threshold levels.

Method of Limits Con:

Con: path dependence (hysteresis) → threshold will depend on what you started with

Method of Constant Stimuli

Present stimuli in random order at every level (many trials) and a psychometric function is created (plot results)

Method of Constant Stimuli Pro:

gold standard(Accurate and reliable), yields psychometric function

Method of Constant Stimuli Con:

Too many trials requires preselecting stimulus levels 

Staircase Method

Adjusts difficulty based on how you are responding and creates threshold based on that information

Staircase Method Pro:

fastest doesn't require pre selecting  levels, can use non experimental subject 

Staircase method Con

no psychometric function