PennController for IBEX › Forums › FAQ / Tips › Buttons for priming experiments › Reply To: Buttons for priming experiments
![](https://www.pcibex.net/wp-content/uploads/2018/10/IMG_8365-e1540835663655-150x150.jpg)
Hi,
You can allow selection through both keypresses and clicks using a Selector element, as illustrated in the tutorial
Clicks are notoriously slower than key strokes, but letting participants tap buttons on a touchscreen is of course a better option than asking them to use a virtual keyboard. It’s probably a good idea to explicitly invite your participants to press keys if they have a keyboard (it will also make them go through the experiment faster than clicking, which they will surely appreciate) or to tap the buttons if they have a touchscreen. You could ask them to fill a form at the end of the experiment where they report how they made their selections. And if you want to have an independent measure, you can always keep a Key element but log
it without wait
ing for it, so you see in the results file whether they pressed a key
Example:
newTrial( newText("<p>HELLO</p>").bold().center().print() , defaultText .italic() .size("10em","5em") .css({ border: "solid 1px gray", padding: "0.5em", 'text-align': "center" }) , newCanvas("container", "30em", "auto") .add("right at 10em", 0, newText("yes","<p>Word</p><p>(F)</p>")) .add("left at 20em", 0, newText("no","<p>Not a word</p><p>(J)</p>")) .center() .print() , newKey("FJ").log("first") , newSelector("answer") .add(getText("yes"),getText("no")) .keys("F","J") .log() .wait() )
Jeremy