This test measures the ability of an individual to develop and maintain a problem-solving strategy that shifts and adapts as the game changes. Put simply, it assesses higher cognitive functions like attention, perseverance, working memory, abstract thinking, and mental flexibility. It consists of sorting a number of cards with images on them according to different facets, and criteria randomly changes without explicit direction of the researcher. Rather, the researcher simply gives affirmative or dismissive indications. A higher score indicates worse performance.