You'd be right.
In English, a determiner comes before the noun it modifies, even when the noun is modified by an adjective:
one <subject>
considers <verb>
a/the <determiner>
measured <adjective>
variable <singular noun>
one <subject>
considers <verb>
the <determiner>
measured <adjective>
variables <plural noun>
in this study <prepositional phrase; defining - explains "the">
one <subject>
considers <verb>
measured <adjective>
variables <plural noun>