IPA: //ˌsaɪ.kəʊ.məˈtrɪʃ.ən//
KK: /saɪˌkɒməˈtrɪʃən/
A professional who specializes in creating and interpreting tests that measure mental abilities, personality traits, and other psychological attributes.
The psychometrician analyzed the test results to provide insights into the students' learning styles.
Psychometrician → It is formed from "psycho-" (from Greek "psukhē", meaning soul or mind) and "metric" (from Greek "metron", meaning measure) and the suffix "-ian" (meaning relating to or one who). A psychometrician is a person who measures mental capacities and processes.
Think of 'psycho-' relating to the 'mind' and 'metric' meaning 'measure' — a psychometrician is someone who measures aspects of the mind.