Millisecond Forums » Millisecond Forums » Inquisit 6 » Creating a "random" combination of photos and statements

Creating a "random" combination of photos and statements

Ishika — Fri, 19 Feb 2021 19:29:34 GMT

Hi,
I am trying to create an experiment in which participants will go through 8 trials in which they rate a photo and a statement which are presented together. I want to randomly present 4 control and 4 experimental statements, paired with photos of either black (out of a pool of 12 pictures) or white individuals (also out of a pool of 12). Ultimately, participants will have seen (in some random order):
Ctrl + White
Ctrl + White
Ctrl + Black
Ctrl + Black
Exp + White
Exp + White
Exp + Black
Exp + Black
I am very new to Inquisit, and am a little confused on how to create conditions to ensure that the photo and statement are randomized, but conditionally. Any help on how to create something that performs this function is greatly appreciated. Thank you!

RE: Creating a "random" combination of photos and statements

Dave — Fri, 19 Feb 2021 19:29:34 GMT

+x[quote]

[b]Ishika - 2/19/2021[/b]
Thanks so much for your help!

I have one more question regarding survey pages -- if I wanted to present the questions over two survey pages, how do I ensure that the stimuli are displayed on both pages?
[/quote]

[code]<defaults>
/ fontstyle = ("Arial", 2%)
</defaults>

<block example>
/ trials = [1-8 = noreplace(ctrl_white_a, ctrl_black_a, exp_white_a, exp_black_a)]
</block>

<values>
/ individual = 1
/ statement = 1
</values>

<surveypage ctrl_white_a>
/ ontrialbegin = [
    values.individual = list.white_individuals.nextindex;
    values.statement = list.ctrl_statements.nextindex;
]

/ stimulusframes = [1=white_individual, ctrl_statement]
/ questions = [1=q1; 2=q2]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
/ branch = [
    surveypage.ctrl_white_b;
]
</surveypage>

<surveypage ctrl_white_b>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ questions = [1=q3; 2=q4]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage ctrl_black_a>
/ ontrialbegin = [
    values.individual = list.black_individuals.nextindex;
    values.statement = list.ctrl_statements.nextindex;
]

/ stimulusframes = [1=black_individual, ctrl_statement]
/ questions = [1=q1; 2=q2]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
/ branch = [
    surveypage.ctrl_black_b;
]
</surveypage>

<surveypage ctrl_black_b>
/ stimulusframes = [1=black_individual, ctrl_statement]
/ questions = [1=q3; 2=q4]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage exp_white_a>
/ ontrialbegin = [
    values.individual = list.white_individuals.nextindex;
    values.statement = list.exp_statements.nextindex;
]

/ stimulusframes = [1=white_individual, exp_statement]
/ questions = [1=q1; 2=q2]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
/ branch = [
    surveypage.exp_white_b;
]
</surveypage>

<surveypage exp_white_b>
/ stimulusframes = [1=white_individual, exp_statement]
/ questions = [1=q3; 2=q4]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage exp_black_a>
/ ontrialbegin = [
    values.individual = list.black_individuals.nextindex;
    values.statement = list.exp_statements.nextindex;
]

/ stimulusframes = [1=black_individual, exp_statement]
/ questions = [1=q1; 2=q2]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
/ branch = [
    surveypage.exp_black_b;
]
</surveypage>

<surveypage exp_black_b>
/ stimulusframes = [1=black_individual, exp_statement]
/ questions = [1=q3; 2=q4]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<radiobuttons q1>
/ caption = "Q1?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 50%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q2>
/ caption = "Q2?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 65%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q3>
/ caption = "Q3?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 80%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q4>
/ caption = "Q4?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 95%)
/ orientation = horizontalequal
</radiobuttons>

<picture white_individual>
/ items = white_individuals
/ size = (15%, 15%)
/ position = (50%, 20%)
/ select = values.individual
</picture>

<picture black_individual>
/ items = black_individuals
/ size = (15%, 15%)
/ position = (50%, 20%)
/ select = values.individual
</picture>

<list white_individuals>
/ poolsize = 12
</list>

<list black_individuals>
/ poolsize = 12
</list>

<item white_individuals>
/ 1 = "white_01.jpg"
/ 2 = "white_02.jpg"
/ 3 = "white_03.jpg"
/ 4 = "white_04.jpg"
/ 5 = "white_05.jpg"
/ 6 = "white_06.jpg"
/ 7 = "white_07.jpg"
/ 8 = "white_08.jpg"
/ 9 = "white_09.jpg"
/ 10 = "white_10.jpg"
/ 11 = "white_11.jpg"
/ 12 = "white_12.jpg"
</item>

<item black_individuals>
/ 1 = "black_01.jpg"
/ 2 = "black_02.jpg"
/ 3 = "black_03.jpg"
/ 4 = "black_04.jpg"
/ 5 = "black_05.jpg"
/ 6 = "black_06.jpg"
/ 7 = "black_07.jpg"
/ 8 = "black_08.jpg"
/ 9 = "black_09.jpg"
/ 10 = "black_10.jpg"
/ 11 = "black_11.jpg"
/ 12 = "black_12.jpg"
</item>

<text ctrl_statement>
/ items = ctrl_statements
/ position = (50%, 35%)
/ select = values.statement
</text>

<text exp_statement>
/ items = exp_statements
/ position = (50%, 35%)
/ select = values.statement
</text>

<list ctrl_statements>
/ poolsize = 4
</list>

<list exp_statements>
/ poolsize = 4
</list>

<item ctrl_statements>
/ 1 = "ctrl statement 01"
/ 2 = "ctrl statement 02"
/ 3 = "ctrl statement 03"
/ 4 = "ctrl statement 04"
</item>

<item exp_statements>
/ 1 = "exp statement 01"
/ 2 = "exp statement 02"
/ 3 = "exp statement 03"
/ 4 = "exp statement 04"
</item>[/code]

RE: Creating a "random" combination of photos and statements

Ishika — Fri, 19 Feb 2021 18:58:25 GMT

Thanks so much for your help!

I have one more question regarding survey pages -- if I wanted to present the questions over two survey pages, how do I ensure that the stimuli are displayed on both pages?

RE: Creating a "random" combination of photos and statements

Dave — Fri, 05 Feb 2021 18:01:53 GMT

+x[quote]

[b]Ishika - 2/5/2021[/b]
+x[quote]

[b]Dave - 12/23/2020[/b]
+x[quote]

[b]Ishika - 12/23/2020[/b]
Hi,
I am trying to create an experiment in which participants will go through 8 trials in which they rate a photo and a statement which are presented together. I want to randomly present 4 control and 4 experimental statements, paired with photos of either black (out of a pool of 12 pictures) or white individuals (also out of a pool of 12). Ultimately, participants will have seen (in some random order):
Ctrl + White
Ctrl + White
Ctrl + Black
Ctrl + Black
Exp + White
Exp + White
Exp + Black
Exp + Black
I am very new to Inquisit, and am a little confused on how to create conditions to ensure that the photo and statement are randomized, but conditionally. Any help on how to create something that performs this function is greatly appreciated. Thank you!
[/quote]

I don't see where or why you need any conditional randomization for the procedure you described. It's implementable using just the most basic syntax constructs covered in the tutorials ( https://www.millisecond.com/support/docs/v6/html/tutorials/tutorials.htm )

[code]<block example>
/ trials = [1-8 = noreplace(ctrl_white, ctrl_black, exp_white, exp_black)]
</block>

<likert ctrl_white>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert ctrl_black>
/ stimulusframes = [1=black_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_white>
/ stimulusframes = [1=white_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_black>
/ stimulusframes = [1=black_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<picture white_individual>
/ items = white_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<picture black_individual>
/ items = black_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<item white_individuals>
/ 1 = "white_01.jpg"
/ 2 = "white_02.jpg"
/ 3 = "white_03.jpg"
/ 4 = "white_04.jpg"
/ 5 = "white_05.jpg"
/ 6 = "white_06.jpg"
/ 7 = "white_07.jpg"
/ 8 = "white_08.jpg"
/ 9 = "white_09.jpg"
/ 10 = "white_10.jpg"
/ 11 = "white_11.jpg"
/ 12 = "white_12.jpg"
</item>

<item black_individuals>
/ 1 = "black_01.jpg"
/ 2 = "black_02.jpg"
/ 3 = "black_03.jpg"
/ 4 = "black_04.jpg"
/ 5 = "black_05.jpg"
/ 6 = "black_06.jpg"
/ 7 = "black_07.jpg"
/ 8 = "black_08.jpg"
/ 9 = "black_09.jpg"
/ 10 = "black_10.jpg"
/ 11 = "black_11.jpg"
/ 12 = "black_12.jpg"
</item>

<text ctrl_statement>
/ items = ctrl_statements
/ position = (50%, 55%)
</text>

<text exp_statement>
/ items = exp_statements
/ position = (50%, 55%)
</text>

<item ctrl_statements>
/ 1 = "ctrl statement 01"
/ 2 = "ctrl statement 02"
/ 3 = "ctrl statement 03"
/ 4 = "ctrl statement 04"
</item>

<item exp_statements>
/ 1 = "exp statement 01"
/ 2 = "exp statement 02"
/ 3 = "exp statement 03"
/ 4 = "exp statement 04"
</item>[/code]

[/quote]

Hi Dave, thanks so much for your response. This certainly clears up my randomization issues. I was wondering how I can include a bunch of questions on the same page as the stimuli pair. I tried changing the likert items to trials and adding all my questions, but that hasn't worked. I am trying to create something along the lines of:

<element>
/ stimulusframes = [1=white_individual, ctrl_statement]
/questions = [1 = Q1, 2 = Q2,...., 7 = Q7]
</element>

My questions look something like this:

<radiobuttons Perceived_Prejudice3>
/ caption = "How likely do you think this person is prejudiced against sexual minorities?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (75%, 50%)
/ orientation = horizontalequal
</radiobuttons>

I also tried to create a surveypage of the questions, but I am not sure how to ensure that all 7 questions are displayed on the same screen as the stimuli pair, for every single trial.

Thanks again for your help!
[/quote]

<surveypage>s is exactly what you need to set up.

<surveypage ctrl_white>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ questions = [1=q1; 2=q2; 3=q3; 4=q4; 5=q5; ...]
/ showpagenumbers = false
/ showquestionnumbers = false
</surveypage>

and so forth.

[code]<defaults>
/ fontstyle = ("Arial", 2%)
</defaults>

<block example>
/ trials = [1-8 = noreplace(ctrl_white, ctrl_black, exp_white, exp_black)]
</block>

<surveypage ctrl_white>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ questions = [1=q1; 2=q2; 3=q3; 4=q4; 5=q5]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage ctrl_black>
/ stimulusframes = [1=black_individual, ctrl_statement]
/ questions = [1=q1; 2=q2; 3=q3; 4=q4; 5=q5]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage exp_white>
/ stimulusframes = [1=white_individual, exp_statement]
/ questions = [1=q1; 2=q2; 3=q3; 4=q4; 5=q5]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<surveypage exp_black>
/ stimulusframes = [1=black_individual, exp_statement]
/ questions = [1=q1; 2=q2; 3=q3]
/ showpagenumbers = false
/ showquestionnumbers = false
/ nextbuttonposition = (50%, 125%)
</surveypage>

<radiobuttons q1>
/ caption = "Q1?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 50%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q2>
/ caption = "Q2?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 65%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q3>
/ caption = "Q3?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 80%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q4>
/ caption = "Q4?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 95%)
/ orientation = horizontalequal
</radiobuttons>

<radiobuttons q5>
/ caption = "Q5?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (5%, 110%)
/ orientation = horizontalequal
</radiobuttons>

<picture white_individual>
/ items = white_individuals
/ size = (15%, 15%)
/ position = (50%, 20%)
</picture>

<picture black_individual>
/ items = black_individuals
/ size = (15%, 15%)
/ position = (50%, 20%)
</picture>

<item white_individuals>
/ 1 = "white_01.jpg"
/ 2 = "white_02.jpg"
/ 3 = "white_03.jpg"
/ 4 = "white_04.jpg"
/ 5 = "white_05.jpg"
/ 6 = "white_06.jpg"
/ 7 = "white_07.jpg"
/ 8 = "white_08.jpg"
/ 9 = "white_09.jpg"
/ 10 = "white_10.jpg"
/ 11 = "white_11.jpg"
/ 12 = "white_12.jpg"
</item>

<item black_individuals>
/ 1 = "black_01.jpg"
/ 2 = "black_02.jpg"
/ 3 = "black_03.jpg"
/ 4 = "black_04.jpg"
/ 5 = "black_05.jpg"
/ 6 = "black_06.jpg"
/ 7 = "black_07.jpg"
/ 8 = "black_08.jpg"
/ 9 = "black_09.jpg"
/ 10 = "black_10.jpg"
/ 11 = "black_11.jpg"
/ 12 = "black_12.jpg"
</item>

<text ctrl_statement>
/ items = ctrl_statements
/ position = (50%, 35%)
</text>

<text exp_statement>
/ items = exp_statements
/ position = (50%, 35%)
</text>

<item ctrl_statements>
/ 1 = "ctrl statement 01"
/ 2 = "ctrl statement 02"
/ 3 = "ctrl statement 03"
/ 4 = "ctrl statement 04"
</item>

<item exp_statements>
/ 1 = "exp statement 01"
/ 2 = "exp statement 02"
/ 3 = "exp statement 03"
/ 4 = "exp statement 04"
</item>[/code]

RE: Creating a "random" combination of photos and statements

Ishika — Fri, 05 Feb 2021 16:27:07 GMT

+x[quote]

[b]Dave - 12/23/2020[/b]
+x[quote]

[b]Ishika - 12/23/2020[/b]
Hi,
I am trying to create an experiment in which participants will go through 8 trials in which they rate a photo and a statement which are presented together. I want to randomly present 4 control and 4 experimental statements, paired with photos of either black (out of a pool of 12 pictures) or white individuals (also out of a pool of 12). Ultimately, participants will have seen (in some random order):
Ctrl + White
Ctrl + White
Ctrl + Black
Ctrl + Black
Exp + White
Exp + White
Exp + Black
Exp + Black
I am very new to Inquisit, and am a little confused on how to create conditions to ensure that the photo and statement are randomized, but conditionally. Any help on how to create something that performs this function is greatly appreciated. Thank you!
[/quote]

I don't see where or why you need any conditional randomization for the procedure you described. It's implementable using just the most basic syntax constructs covered in the tutorials ( https://www.millisecond.com/support/docs/v6/html/tutorials/tutorials.htm )

[code]<block example>
/ trials = [1-8 = noreplace(ctrl_white, ctrl_black, exp_white, exp_black)]
</block>

<likert ctrl_white>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert ctrl_black>
/ stimulusframes = [1=black_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_white>
/ stimulusframes = [1=white_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_black>
/ stimulusframes = [1=black_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<picture white_individual>
/ items = white_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<picture black_individual>
/ items = black_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<item white_individuals>
/ 1 = "white_01.jpg"
/ 2 = "white_02.jpg"
/ 3 = "white_03.jpg"
/ 4 = "white_04.jpg"
/ 5 = "white_05.jpg"
/ 6 = "white_06.jpg"
/ 7 = "white_07.jpg"
/ 8 = "white_08.jpg"
/ 9 = "white_09.jpg"
/ 10 = "white_10.jpg"
/ 11 = "white_11.jpg"
/ 12 = "white_12.jpg"
</item>

<item black_individuals>
/ 1 = "black_01.jpg"
/ 2 = "black_02.jpg"
/ 3 = "black_03.jpg"
/ 4 = "black_04.jpg"
/ 5 = "black_05.jpg"
/ 6 = "black_06.jpg"
/ 7 = "black_07.jpg"
/ 8 = "black_08.jpg"
/ 9 = "black_09.jpg"
/ 10 = "black_10.jpg"
/ 11 = "black_11.jpg"
/ 12 = "black_12.jpg"
</item>

<text ctrl_statement>
/ items = ctrl_statements
/ position = (50%, 55%)
</text>

<text exp_statement>
/ items = exp_statements
/ position = (50%, 55%)
</text>

<item ctrl_statements>
/ 1 = "ctrl statement 01"
/ 2 = "ctrl statement 02"
/ 3 = "ctrl statement 03"
/ 4 = "ctrl statement 04"
</item>

<item exp_statements>
/ 1 = "exp statement 01"
/ 2 = "exp statement 02"
/ 3 = "exp statement 03"
/ 4 = "exp statement 04"
</item>[/code]

[/quote]

Hi Dave, thanks so much for your response. This certainly clears up my randomization issues. I was wondering how I can include a bunch of questions on the same page as the stimuli pair. I tried changing the likert items to trials and adding all my questions, but that hasn't worked. I am trying to create something along the lines of:

<element>
/ stimulusframes = [1=white_individual, ctrl_statement]
/questions = [1 = Q1, 2 = Q2,...., 7 = Q7]
</element>

My questions look something like this:

<radiobuttons Perceived_Prejudice3>
/ caption = "How likely do you think this person is prejudiced against sexual minorities?"
/ options = ("Extremely likely", "Likely", "Somewhat likely", "Neither likely nor unlikely", "Somewhat unlikely", "Unlikely", "Extremely likely")
/ optionvalues = ("1", "2", "3", "4", "5", "6", "7")
/ order = sequence
/ position = (75%, 50%)
/ orientation = horizontalequal
</radiobuttons>

I also tried to create a surveypage of the questions, but I am not sure how to ensure that all 7 questions are displayed on the same screen as the stimuli pair, for every single trial.

Thanks again for your help!

RE: Creating a "random" combination of photos and statements

Dave — Wed, 23 Dec 2020 21:09:37 GMT

+x[quote]

[b]Ishika - 12/23/2020[/b]
Hi,
I am trying to create an experiment in which participants will go through 8 trials in which they rate a photo and a statement which are presented together. I want to randomly present 4 control and 4 experimental statements, paired with photos of either black (out of a pool of 12 pictures) or white individuals (also out of a pool of 12). Ultimately, participants will have seen (in some random order):
Ctrl + White
Ctrl + White
Ctrl + Black
Ctrl + Black
Exp + White
Exp + White
Exp + Black
Exp + Black
I am very new to Inquisit, and am a little confused on how to create conditions to ensure that the photo and statement are randomized, but conditionally. Any help on how to create something that performs this function is greatly appreciated. Thank you!
[/quote]

I don't see where or why you need any conditional randomization for the procedure you described. It's implementable using just the most basic syntax constructs covered in the tutorials ( https://www.millisecond.com/support/docs/v6/html/tutorials/tutorials.htm )

[code]<block example>
/ trials = [1-8 = noreplace(ctrl_white, ctrl_black, exp_white, exp_black)]
</block>

<likert ctrl_white>
/ stimulusframes = [1=white_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert ctrl_black>
/ stimulusframes = [1=black_individual, ctrl_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_white>
/ stimulusframes = [1=white_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<likert exp_black>
/ stimulusframes = [1=black_individual, exp_statement]
/ anchors = [1="Agree"; 7="Disagree"]
/ numpoints = 7
/ anchorwidth = 3%
/ position = (50%, 70%)
</likert>

<picture white_individual>
/ items = white_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<picture black_individual>
/ items = black_individuals
/ size = (25%, 25%)
/ position = (50%, 30%)
</picture>

<item white_individuals>
/ 1 = "white_01.jpg"
/ 2 = "white_02.jpg"
/ 3 = "white_03.jpg"
/ 4 = "white_04.jpg"
/ 5 = "white_05.jpg"
/ 6 = "white_06.jpg"
/ 7 = "white_07.jpg"
/ 8 = "white_08.jpg"
/ 9 = "white_09.jpg"
/ 10 = "white_10.jpg"
/ 11 = "white_11.jpg"
/ 12 = "white_12.jpg"
</item>

<item black_individuals>
/ 1 = "black_01.jpg"
/ 2 = "black_02.jpg"
/ 3 = "black_03.jpg"
/ 4 = "black_04.jpg"
/ 5 = "black_05.jpg"
/ 6 = "black_06.jpg"
/ 7 = "black_07.jpg"
/ 8 = "black_08.jpg"
/ 9 = "black_09.jpg"
/ 10 = "black_10.jpg"
/ 11 = "black_11.jpg"
/ 12 = "black_12.jpg"
</item>

<text ctrl_statement>
/ items = ctrl_statements
/ position = (50%, 55%)
</text>

<text exp_statement>
/ items = exp_statements
/ position = (50%, 55%)
</text>

<item ctrl_statements>
/ 1 = "ctrl statement 01"
/ 2 = "ctrl statement 02"
/ 3 = "ctrl statement 03"
/ 4 = "ctrl statement 04"
</item>

<item exp_statements>
/ 1 = "exp statement 01"
/ 2 = "exp statement 02"
/ 3 = "exp statement 03"
/ 4 = "exp statement 04"
</item>[/code]