Dear Inquisiters,
I am trying to program an experiment in which a circle in the middle of the screen should change color intermittently, becoming lighter (different shades of white) to then turn back to its original color (grey, cicle_195). Participants are instructed to press the spacebar whenever they are able to detect this color change.
I want that whenever the circle becomes lighter, Inquisit selects randomly one of the different pictures of circles that I uploaded as items, and I want this to happen continuously within the same trial. For example, if on the first trial the circle becomes lighter 19 times, I want the picture to be selected newly 19 times, so that participants do not see always the same picture in one trial.
I thought that the problem would have been solved by using a counter or a list and by using /selectionrate = always, but Inquisit keeps selecting a new picture for each trial.
Here is the code example:
<picture circle_195>
/ items = ("195.png")
/ position = (50%,50%)
/size=(30%, 30%)
</picture>
<item circle_w>
/1 = "255.png"
/2 = "250.png"
/3 = "245.png"
/4 = "240.png"
/5 = "235.png"
/6 = "230.png"
/7="225.png"
/8="220.png"
/9="215.png"
/10="210.png"
/11="205.png"
/12="197.png"
</item>
<picture circle>
/ items = circle_w
/ select = picselect
/ position = (50%,50%)
/size=(30%, 30%)
</picture>
<counter picselect>
/items= (1,2,3,4,5,6,7,8,9,10,11,12)
/select =noreplace
/selectionrate = always
</counter>
<trial baseline_1>
/ ontrialbegin = [
values.spacebarpresscount = "";
values.timeofresponse = "";
values.trialtype = "ET";
values.trialcondition = "safe";
]
/stimulustimes=[
0=circle_195;
757= circle;
1694= circle;
2821= circle;
3943= circle;
5114= circle;
6204= circle;
7312= circle;
8380= circle;
9460= circle;
10615= circle;
11681= circle;
12805= circle;
13889= circle;
14986= circle;
16149= circle;
17259= circle;
18491= circle;
19631= circle;
802= circle_195;
1739= circle_195;
2866= circle_195;
3988= circle_195;
5159= circle_195;
6249= circle_195;
7357= circle_195;
8425= circle_195;
9505= circle_195;
10660= circle_195;
11726= circle_195;
12850= circle_195;
13934= circle_195;
15031= circle_195;
16194= circle_195;
17304= circle_195;
18536= circle_195;
19676= circle_195;
]
/ trialduration = 19676
/ inputdevice = keyboard
/ beginresponsetime = -1
/ responseinterrupt = trial
/ validresponse = (-57, 0)
/ correctresponse = (0)
/ showmousecursor = false
/ isvalidresponse = [if(trial.baseline_1.response==57){
values.spacebarpresscount += 1;
values.timeofresponse=concat(concat(values.timeofresponse, trial.baseline_1.latency),",");
false};]
/ branch = [
trial.warning_1;
]
</trial>
<trial warning_1>
/ ontrialbegin = [
values.spacebarpresscount = "";
values.timeofresponse = "";
values.trialtype = "ET";
values.trialcondition = "safe";
]
/stimulustimes=[
0=circle_195,flowers;
454= circle;
1568= circle;
2735= circle;
3919= circle;
5044= circle;
6303= circle;
7445= circle;
8664= circle;
9798= circle;
11005= circle;
12210= circle;
13275= circle;
14446= circle;
15630= circle;
16737= circle;
17852= circle;
19019= circle;
499= circle_195;
1613= circle_195;
2780= circle_195;
3964= circle_195;
5089= circle_195;
6348= circle_195;
7490= circle_195;
8709= circle_195;
9843= circle_195;
11050= circle_195;
12255= circle_195;
13320= circle_195;
14491= circle_195;
15675= circle_195;
16782= circle_195;
17897= circle_195;
19064= circle_195;
]
/ trialduration = 19064+1000
/ inputdevice = keyboard
/ beginresponsetime = -1
/ responseinterrupt = trial
/ validresponse = (-57, 0)
/ correctresponse = (0)
/ showmousecursor = false
/ isvalidresponse = [if(trial.warning_1.response==57){
values.spacebarpresscount += 1;
values.timeofresponse=concat(concat(values.timeofresponse, trial.warning_1.latency),",");
false};]
/ branch = [
trial.pausa;
]
</trial>
<trial pausa>
/ stimulusframes = [1=pausa]
/ timeout = 15000
/ branch = [
trial.space;]
</trial>
<text pausa>
/ fontstyle = ("Trebuchet MS", 3%, false, false, false, false, 5, 1)
/ items = ("Prenditi una pausa e riposati.
Appena compare la schermata con scritto di premere la barra spaziatrice potrai continuare l esperimento")
/ size = (60%, 40%)
</text>
<text space>
/ txcolor = white
/ fontstyle = ("Arial", 20pt, true)
/ items = ("Press the spacebar to continue")
</text>
<trial space>
/ stimulusframes = [1=space]
/ inputdevice = keyboard
/ correctresponse =(57)
/ validresponse = (57)
/ posttrialpause = 500
</trial>
<block acc>
/ trials = [1=baseline_1; ]
If needed, I can provide the full script with the pictures too!
Thank you so much in advance!!