Retrieves the value of a parameter that was passed after
? in the URL. This is particularly useful if you pass a uniquely identifying code to the URL when you recruit your participants, like http://spellout.net/ibexexps/PennController/Demo/experiment.html?id=abcdefgh
@ @newTrial( "my trial" , @ newButton("helloworld", "Hello world!") @ .log() @ .print() @ .wait() @) $.log( "ID" , GetURLParameter( "id" ) );
- Will add a column to each result line logged by my trial reporting the value that was passed after
id=in the URL.