Millisecond Forums

> Is it possible to consider the response only when the participant respond to the correspondent stimulus onset?

Try explicitly specifying when Inquisit should start accepting responses via /beginresponsetime in your <trial> elements. E.g.

<trial Combat>
/ inputdevice = XID
/ontrialbegin = [trial.Combat.insertstimulustime(text.Combat, values.fixationcrosspresentationtime)]
/ beginresponsetime =  values.fixationcrosspresentationtime
/stimulustimes = [0=fixation, redreminder, greenreminder, bluereminder, yellowreminder]
/ isvalidresponse = [trial.Combat.response == values.keyyellow || trial.Combat.response == values.keyred ||
                        trial.Combat.response == values.keyblue || trial.Combat.response == values.keygreen]

/iscorrectresponse = [        (text.Combat.textcolor == yellow && trial.Combat.response == values.keyyellow) ||
                            (text.Combat.textcolor == red && trial.Combat.response == values.keyred) ||
                            (text.Combat.textcolor == blue && trial.Combat.response == values.keyblue) ||
                            (text.Combat.textcolor == green && trial.Combat.response == values.keygreen)]
/ontrialend = [trial.Combat.resetstimulusframes()]
/ontrialend = [values.target = text.Combat.currentitem]
/ontrialend = [if (text.Combat.textcolor == yellow) values.color = "yellow"
                else if (text.Combat.textcolor == red) values.color = "red"
                else if (text.Combat.textcolor == blue) values.color = "blue"
                else values.color = "green"]
/ontrialend = [if (trial.Combat.correct) {values.correct_Combat += 1; values.sumrt_combat += trial.Combat.latency}]
/ errormessage = true(x, 400)
</trial>

> Another thing: is it possible to randomise the colour of the words in a way that no colour will be repeated consecutively twice?

Give the way how the script / color selection is set up: No, I don't see a way to do that.

Hello,

Thank you for your quick reply!
I have tried to do what you suggested, but still, if I press the key three times in the first trial, the second and the third trials stop quickly (as they already had a response from the previous trial)...

Elena

Can you post a raw data file showing that? Particularly the response columns and latencies recorded for those 3 trials would be of interest.