Table 2.
Cognitrax Test Instructions
| Task | Approximate time required (min) | Overview |
|---|---|---|
| VBM | 3 | First, memorize 15 words. Then, from the 30 words that appear at random, select the word you remembered. |
| VIM | 3 | Graphic version of the VBM test |
| Finger Tapping | 2 | Quickly tap the key for 10 sec with your index finger. Do this with both right and left hands. |
| SDC | 4 | Enter the number corresponding to the symbol while referring to the symbol-to-number correspondence table. |
| Stroop | 5 | It consists of Parts 1–3. Part 1 is pressing the key when the character appears. (Red, yellow, blue, and green letters written in black are displayed.) Parts 2 and 3 display the letters red, yellow, blue, and green written in red, yellow, blue, and green. Part 2 is pressing the key when matches, letters, and colors match. Part 3 is pressing the key when letters and colors do not match. |
| Shifting attention | 3 | Follow the instructions on the screen and select the option that matches the color or shape. It is a combination of red, blue, yellow, and green letters and colors. |
| Continuous Performance | 5 | Random letters of the alphabet are displayed one by one. Press the key only when B is displayed. |
| Perception of Emotions | 2 | The photo of a face and a word describing facial expression are displayed. The word used may be “calm,” “happy,” “sad,” or “angry.” Press the key only if the photo and description match. We evaluated positive emotions (calm and happiness), negative emotions (sadness and anger), and their sums. |
| Nonverbal Reasoning | 3 | One of the four sections is blank and three have symbols. Five examples are displayed on the screen. Subjects look at the examples and choose the ones that are closest to the three symbols. |
| Four-Part Continuous Performance | 7 | It consists of Parts 1–4. Part 1 is pressing the key when the figure appears. Part 2 is pressing the key when a green circle appears. Part 3 is 1-back task. Part 4 is 2-back task. Shapes are displayed for Parts 3 and 4. Shapes are a combination of circles, triangles, squares, and star shapes and red, blue, yellow, and green colors. |
SDC, symbol digit coding; VBM, verbal memory; VIM, visual memory.