inkblot test
In the 1950s, inkblots were synonymous with psychology.
It was believed that mental health could be tested by seeing what patterns you discern in random inkblot designs.
On the other side of the map there were several pictures which, from a distance, looked like ink blots.

SMART Vocabulary: related words and phrases

Dirt & untidiness
bloodstain
clutter
contaminant
contamination
crud
fleck
grime
grunge
gunge
gunk
muck
pollutant
polluter
scrappiness
scruff
shambles
slime
slob
slovenliness
smear

You can also find related words, phrases, and synonyms in the topics:

Science of psychology & psychoanalysis
Exams, tests & exercises