Millisecond Forums » Millisecond Forums » Inquisit 4 » Combine two item sets into one/ random trial presentation from unequal item sets

Combine two item sets into one/ random trial presentation from unequal item sets

fflade — Fri, 27 May 2016 06:22:14 GMT

Hello,

I find myself with two item elements: one has 15 items, the other one 4. The one with only 4 items is initially empty and filled during initialization. Now, i'd like to display all 29 items randomly. Every item should be displayed, but none of them twice. How do I do this? I tried list elements, and various noreplace() everywhere, but I seem to miss the point.

<item speakerselect_1>
</item>

<picture speakerselect_1>
/ items = speakerselect_1
/select = noreplace
/ size = (40%,40%)
/ position = (50,50)
/ valign = center
</picture>

<picture speaker_2>
/ items = speaker_2
/ select = noreplace
/ size = (40%,40%)
/ position = (50,50)
/ valign = center
</picture>

<item speaker_2>
/5 = "20.jpg"
/6 = "21.jpg"
/7 = "22.jpg"
/8 = "23.jpg"
/9 = "24.jpg"
/10 = "25.jpg"
/11 = "26.jpg"
/12 = "27.jpg"
/13 = "28.jpg"
/14 = "29.jpg"
/15 = "30.jpg"
/16 = "16.jpg"
/17 = "17.jpg"
/18 = "18.jpg"
/19 = "19.jpg"
</item>

<trial environment_1_figure>
/stimulusframes=[1=speakerselect_1]
/trialduration = 1000
</trial>

<trial environment_1_ground>
/stimulusframes=[1=speaker_2]
/trialduration = 1000
</trial>

<block environment_1>
/ trials = [1-19=noreplace(environment_1_figure, environment_1_ground)]
</block>

This is not a working example, but I hope that makes it clearer. Thanks a lot!

RE: Combine two item sets into one/ random trial presentation from unequal item sets

fflade — Fri, 27 May 2016 06:22:14 GMT

Yeah, I solved that one. Sorry for bothering you, but thanks for all the other solutions! It is very amazing how fast you answer.

Best,
Felicitas

RE: Combine two item sets into one/ random trial presentation from unequal item sets

Dave — Tue, 24 May 2016 16:16:48 GMT

I'm not sure what you mean by "repeat likert type question", but <likert> elements work exactly like trial elements, so it essentially works the same way as what you already have with your <trial> elements.

RE: Combine two item sets into one/ random trial presentation from unequal item sets

fflade — Tue, 24 May 2016 14:35:57 GMT

Thank you so much, Dave!

And here is a bonus question: How do I put those nineteen loose pictures into a repeat likert type question?

Cheers,
Felicitas

(I hope this does not sound lazy, but at least the last answer was not totally obvious, I think)

RE: Combine two item sets into one/ random trial presentation from unequal item sets

Dave — Tue, 24 May 2016 13:59:18 GMT

You need to enter your trials into the <block> element's /trials selection pool in the required proportions:

You want 4 "environment_1_figure" trials and 15 "environment_1_ground" trials, so that's what you need to specify:

<block environment_1>
/ trials = [1-19=noreplace(environment_1_figure, environment_1_figure, environment_1_figure, environment_1_figure,
environment_1_ground, environment_1_ground, environment_1_ground, environment_1_ground,
environment_1_ground, environment_1_ground, environment_1_ground, environment_1_ground,
environment_1_ground, environment_1_ground, environment_1_ground, environment_1_ground,
environment_1_ground, environment_1_ground, environment_1_ground)]
</block>