Aresearcher's description of his sample as "the participants were 45 latino children under age 14" is an example of

A researcher's description of his sample as "the participants were 45 Latino children under age 14" is an example of ethnic gloss.
In psychology and sociology, the term ethnic gloss refers to overgeneralization - it means that this researcher is using very simplistic label of category in order to refer to a large ethnocultural group of people such as the Latino population, in this example.