Difference: DocsSectionsExampleSpellerPart4 (5 vs. 6)

Revision 614 Nov 2014 - Main.PhilipVanDenBroek

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Example 2: Visual speller

Part 4

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  In previous parts of the experiment, stimulus presentation timing was not accurate. Epochs occurred later than specified and the time between stimuli was not constant throughout a sequence. In this part of the example, we will improve these timing issues by using a simple loop function for stimulus presentation.
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The loop function runSequence executes most actions of the stimulus presentation plug-in. The new flowchart of the plug-in looks like this:
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The loop function runSequence executes most actions of the stimulus presentation import-table. The new flowchart of the imported table looks like this:
  flowchart2.png
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Figure 1: Stimulus presentation plug-in flowchart. Actions indicated in orange are executed at the BrainStream Matlab session, whereas actions indicated in blue are executed at the client.
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Figure 1: Stimulus presentation import-table flowchart. Actions indicated in orange are executed at the BrainStream Matlab session, whereas actions indicated in blue are executed at the client.
  This is the runSequence function:
function ev = runSequence(ev)
 
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