Global Matching is a technical term is the field of psychology, and there are different models that use this idea/theory of learning/understanding evaluations.

The term global is another way of saying universal, that exists in all or most cultures, and types of people independent of other factorts.

I believe that the matching refers to matched effects or correlations.

THIS ARTICLE, and this particular small section, makes it clear that this is a technical term:

"However, there are
several alternative explanations for associative category
length effects, which do not rely on Global Matching, that
we will address in the ‘‘General discussion”.
Global similarity: the within-category choice advantage
The within-category choice (similar distractor) advantage
refers to the superior discriminability observed for
forced-choice test alternatives comprising a same-category
distractor."
http://www.socsci.uci.edu/~mdlee/MaguireEtAl2010.pdf