MLDS (version 0.1-5)

runSampleExperiment: Start and run a Difference Scale Experiment

Description

Runs a difference scaling experiment displaying stimuli with the function DiplayTrial defined by the function DefineStimuli.

Usage

runSampleExperiment(DisplayTrial, DefineStimuli, NumTrials = NULL,
 	DisplaySize = 7.5, ...)

Arguments

DisplayTrial

character giving the name of a function to display a trial with quadruple of stimuli.

DefineStimuli

character giving the name of a function that defines the set of stimuli from which quadruples are drawn.

DisplaySize

numeric giving the overall size of the display on the screen.

NumTrials

integer giving the number of trials to display. If NULL (the default), the number is computed on the basis of the size of stimulus set designated by DefineStimuli.

...

currently unused

Value

• An object of class mlds.df is returned. It inherits from data.frame and has attributes stimulus and invord. See kk for an example.

Details

This function is to demonstrate how to run a difference scaling experiment. Two helper functions DisplayOneTrial and DefineMyScale permit running the perception of correlation experiment, sample data from which are provided as datasets, {see kk.}

Examples

##This will start a 330 trial interactive experiment
runSampleExperiment("DisplayOneTrial", "DefineMyScale")
##This will run 10 trials of an interactive experiment
runSampleExperiment("DisplayOneTrial", 
		"DefineMyScale", NumTrials = 10)