mental measurement vs measuring

mental measurement and measuring both are nouns.

Word	Noun	Adjective	Verb	Adverb
mental measurement	Yes	No	No	No
measuring	Yes	No	No	No

As nouns, measuring is a hypernym of mental measurement; that is, measuring is a word with a broader meaning than mental measurement:

mental measurement: a generic term used to cover any application of measurement techniques to the quantification of mental functions
measuring: the act or process of assigning numbers to phenomena according to a rule

Other hypernyms of mental measurement include measure, measurement, mensuration.

mental measurement (noun)	measuring (noun)
a generic term used to cover any application of measurement techniques to the quantification of mental functions	the act or process of assigning numbers to phenomena according to a rule