The systematic skills of science that psychology students are equipped with mean that they leave university furnished with the ingredients for growth and development. Psychology teaches students to be outstanding abstract thinkers, reflecting on ideas, attributes and relationships. Students of psychology spend a substantive amount of their education on issues such as test reliability and validity and the circumstances, cultural differences or socioeconomic barriers that may influence test results, but outside of the field, it is concerning how many testing misperceptions persist. Writers, academics, computer programmers, engineers, lawyers and, of course, psychologists are all knowledge workers. Psychometricians also go on to develop their skills so that they are able to devise, construct and standardise psychometric tests. As such, 20th-century psychological training has a particular focus on helping students think critically, reflect, share knowledge and ideas, apply this abstract knowledge to practical problems, work autonomously, think divergently and seek continuous improvement.