Jewels B
Jewels B is the alternating variant of the Jewels Trail Making Test. Instead of connecting only numbered jewels, the participant alternates between two differently shaped jewels in ascending order — assessing set-shifting ability in addition to executive function.
ActivitySpec: lamp.jewels_b
Cognitive domain: Executive function, set-shifting, visual and motor abilities
Configuration
- Navigate to the Activities tab and click + Add.
- Select Jewels and choose the Trails B variant.
- Configure the following settings:
| Setting | Description |
|---|---|
| Mode | Difficulty level — Beginner, Intermediate, Advanced, or Expert. Higher difficulty reduces the time limit. Duration can also be set directly. |
| Initial Diamond Count | Number of jewels in Level 1 (up to 25) |
| Initial Shape Count | Number of shapes beyond the standard count |
| Bonus points | Points awarded for each completed level |
API settings fields
| Dashboard Setting | API Field | Type |
|---|---|---|
| Mode | mode | number (1 = beginner, 4 = expert) |
| Initial Diamond Count | diamond_count | number (default 15) |
| Initial Shape Count | shape_count | number (default 1) |
| Bonus points | bonus_point_count | number (default 50) |
| — | variant | string (if trails_b, shapes increase) |
| — | beginner_seconds | number (time limit) |
| — | intermediate_seconds | number (time limit) |
| — | advanced_seconds | number (time limit) |
| — | expert_seconds | number (time limit) |
Sample Instructions
"Look at the bottom of the screen to see which jewel to collect first. Tap number 1 of that shape, and then number 1 of the second shape. Continue alternating the jewel pattern in chronological order until all of the jewels have been collected."
Usage
The participant sees jewels of two different shapes placed randomly on the screen and must tap them in ascending order, alternating between shapes (shape 1 #1, shape 2 #1, shape 1 #2, shape 2 #2, etc.). Each level adds more jewels.
Scoring
Scoring is out of 100 points, with each incorrect jewel resulting in a deduction of 2 points.
References
- Soo-Yong Park & Nadja Schott (2021) The trail-making-test: Comparison between paper-and-pencil and computerized versions, Applied Neuropsychology: Adult, DOI: 10.1080/23279095.2020.1864374
- Chanda Simfukwe et al. (2021) Digital trail making test-black and white: Normal vs MCI, Applied Neuropsychology: Adult, DOI: 10.1080/23279095.2021.1871615
- Magdalene R. Bracken et al. (2019) Trail Making Test: Comparison of paper-and-pencil and electronic versions, Applied Neuropsychology: Adult, 26:6, DOI: 10.1080/23279095.2018.1460371
Demo
Screenshots
Data
static_data
| Field | Type | Description |
|---|---|---|
point | number | 2 if final level was completed, 1 if the game ended on a timeout |
score | string | Percentage correct (e.g., "97.37") |
total_attempts | number | Total tap attempts |
total_bonus_collected | number | Accumulated bonus (time remaining − 2 × errors) |
total_jewels_collected | number | Correctly tapped jewels |
is_favorite | boolean | Whether the participant favorited this activity |
questionnaire | object | Post-game ratings: clarity (1-5), happiness (1-5) |
temporal_slices
| Field | Type | Description |
|---|---|---|
item | number | Jewel number tapped |
type | boolean | true = correct, false = incorrect |
duration | number | Time since previous tap (ms) |
level | number | Trial level |
value | null | Unused |
Example
{
"timestamp": 1650900108188,
"activity": "jewels_b_activity_id",
"duration": 180000,
"static_data": {
"point": 2,
"score": "92.10",
"total_attempts": 80,
"total_bonus_collected": 200,
"total_jewels_collected": 72
},
"temporal_slices": [
{ "item": 1, "value": null, "type": true, "duration": 0, "level": 1 },
{ "item": 2, "value": null, "type": true, "duration": 2100, "level": 1 }
]
}
Cortex Features
jewels_b (raw) → game_level_scores (primary) → game_results (secondary)
Game results returns average tap time per level.
View in Portal | Python SDK | API Reference
See also: Jewels A — the sequential variant