TABLE 3.
Description of the task and the required abilities for the psychological tests administered in the study.
| Test | Task | Required abilities |
| WECHSLER ADULT INTELLIGENCE SCALE III (WAIS-III) | ||
| INFORMATION SUBTEST | Answer general questions | Ability to acquire and retrieve general factual information |
| SIMILARITIES SUBTEST | Define how two words are similar | Verbal concept formation and reasoning |
| VOCABULARY SUBTEST | Define the meaning of a word | Word knowledge and verbal concept formation |
| COMPREHENSION INDEX | Combined score of Information, Similarities and Vocabulary | Verbal reasoning |
| PICTURE COMPLETION SUBTEST | Find what detail is missing in a picture | Perception and recognition of essential visual information |
| BLOCK DESIGN SUBTEST | Arrange colored blocks to form visual patterns | Ability to analyze and synthesize abstract visual stimuli |
| MATRIX REASONING SUBTEST | Chooses the missing part that completes the design | Spatial and classification ability, fluid intelligence |
| PERCEPTUAL ORGANIZATION INDEX | Combined score of Picture Completion, Block Design and Matrix Reasoning | Non-verbal/spatial reasoning |
| DIGIT SYMBOL-CODING SUBTEST | Draw symbols that match numbers paired with the symbols | Visuomotor coordination, psychomotor speed, short-term memory |
| SYMBOL SEARCH SUBTEST | Match symbols with targets | Visuomotor coordination, psychomotor speed, short-term memory |
| PROCESSING SPEED INDEX | Combined score of Digit Symbol-Coding and Symbol Search | Speed of mental processing |
| WECHSLER MEMORY SCALE (WMS-III) LETTER-NUMBER SEQUENCING SUBTEST | Recall and mentally rearrange a sequence of digits and letters | Verbal working memory |
| SPATIAL SPAN SUBTEST | Recall and tap a sequence of spatial positions | Spatial working memory |
| WORKING MEMORY INDEX | Combined score of Letter-Number Sequencing and Spatial span | Working memory |
| WORD LISTS I SUBTEST | Recall a list of 12 words presented 4 times | Verbal/episodic memory and learning |
| WORD LISTS II SUBTEST | Delayed recall of the previous word list | Verbal/episodic long-term memory and retrieval |
| STROOP TEST | ||
| PART 1 | Read names of colors written in black ink (RED, BLUE, GREEN…) | Reading |
| PART 2 | Name the color of bars (XXXX, XXXX, XXXX…) | Naming |
| PART 3 | Name the color of words written in different inks (RED, BLUE, GREEN …) – Comparison to Part 1 or 2 | Mental flexibility, divided attention, executive functioning |