I wanted to follow up that I got the script to work in entirety (and to share the working code). However, it should be noted that the Inquisit Documentation is incorrect in at least two ways: (1) The tutorial that demonstrates how to display participant-generated responses as stimuli has syntax errors; and, (2) There is a ".checked" property for dropdown objects that is not listed among the properties in the dropdown documentation.
Once that was figured out, though, the code works! For anyone trying to do something similar, here it is:
----------
<dropdown sex>
/ caption = "Sex"
/ options = ("female","male")
</dropdown>
<dropdown ethnicity>
/ caption = "Ethnicity (Please choose one)"
/ subcaption = "For the purposes of this question, ~"East Asian~" refers to anywhere in East Asia (e.g., China, Korea, Vietnam, etc.), ~"South Asian~" refers to anywhere in South Asia or South East Asia (e.g., India, Sri Lanka, Pakistan, Indonesia, etc.), ~"White~" refers to anywhere in Europe, the Caucuses, Australia, or New Zealand, ~"Black~" refers to anywhere in the Carribean, West Coast of Africa, or Sub-Saharan Africa, ~"Middle Eastern~" refers to anywhere in the Middle East or Northern Africa (e.g., Arab ethnicity), ~"Latino~" refers to anywhere from Central or South America, and ~"Multiracial~" is any combination of two or more of the previous 6 ethnic groupings."
/ options = ("East Asian","South Asian","White","Black","Middle Eastern","Latino","Multiracial")
/ optionvalues = ("1","2","3","4","5","6","7")
</dropdown>
<surveypage demographicspage>
/ caption = "Please begin by answering the following demographic questions:"
/ questions = [1=sex;2=ethnicity]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.ingroup.item.1 = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.ingroup.item.1 = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.ingroup.item.1 = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.ingroup.item.1 = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.ingroup.item.1 = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.ingroup.item.1 = "Latino"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.ingroup.item.1 = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.1 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.2 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.3 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.4 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.5 == true) item.outgroups.item = "Multiracial"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.6 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "East Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "South Asian"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "White"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "Black"]
/ ontrialend = [if (dropdown.ethnicity.checked.7 == true) item.outgroups.item = "Middle Eastern"]
/ ontrialend = [if (dropdown.sex.checked.1 == true) item.participantsex.item.1 = "Female"]
/ ontrialend = [if (dropdown.sex.checked.2 == true) item.participantsex.item.1 = "Male"]
</surveypage>
<survey demographics>
/ pages = [1=demographicspage]
</survey>
********** PERSON PERCEPTION TASK **********
<text descriptions>
/ items = ("Description 1","Description 2","Description 3","Description 4","Description 5","Description 6","Description 7","Description 8","Description 9","Description 10","Description 11","Description 12")
/ select = noreplacenorepeat
/ position = (50,50)
</text>
<item participantsex>
/ 1 = dropdown.sex.option
</item>
<item ingroup>
/ 1 = dropdown.ethnicity.option
</item>
<item outgroups>
</item>
<text ingroupfilled>
/ items = ingroup
/ position = (25,25)
</text>
<text outgroupsfilled>
/ items = outgroups
/ position = (25,25)
</text>
<text sexfilled>
/ items = participantsex
/ position = (25,30)
</text>
<trial ingroup>
/ stimulustimes = [1=ingroupfilled;2=sexfilled;100=descriptions]
/ response = anyresponse
</trial>
<trial outgroup>
/ stimulustimes = [1=outgroupsfilled;2=sexfilled;100=descriptions]
/ response = anyresponse
</trial>
<block ingroup100>
/ trials = [1-12=ingroup]
</block>
<block ingroup075>
/ trials = [1-12=noreplacenorepeat(ingroup,ingroup,ingroup,outgroup)]
</block>
<block ingroup050>
/ trials = [1-12=noreplacenorepeat(ingroup,ingroup,outgroup,outgroup)]
</block>
<block ingroup025>
/ trials = [1-12=noreplacenorepeat(ingroup,outgroup,outgroup,outgroup)]
</block>
<block ingroup000>
/ trials = [1-12=noreplacenorepeat(outgroup,outgroup,outgroup,outgroup)]
</block>
<expt>
/ subjects = (1 of 5)
/ blocks = [1=demographics;2=ingroup100]
</expt>
<expt>
/ subjects = (2 of 5)
/ blocks = [1=demographics;2=ingroup075]
</expt>
<expt>
/ subjects = (3 of 5)
/ blocks = [1=demographics;2=ingroup050]
</expt>
<expt>
/ subjects = (4 of 5)
/ blocks = [1=demographics;2=ingroup025]
</expt>
<expt>
/ subjects = (5 of 5)
/ blocks = [1=demographics;2=ingroup000]
</expt>
-------------
I hope this helps other people!!