About SGMA Index
Learn the science behind the SGMA Index.
Assessment
The SGMA measures memory performance through the SGMA Index, calculated via our online platform.
Our platform enables customizable monitoring periods, allowing users to set both the duration (e.g., one year) and frequency (e.g., weekly) of assessments. Results from these assessments can visualize performance trends over time.
- Dark – Light Green: Low probability of memory impairment
- Yellow – Orange: Intermediate probability of memory impairment
Red: High probability of memory impairment
This example report represents a patient scheduled for weekly assessments over a one-year period, showcasing the completion of the first month.
How it works
Interface
The SGMA is an 8-minute digital test that guides patients through learning paired associations and adapts in real-time to their responses, ensuring a personalized and engaging experience.
Shown here is an example lesson taken on a tablet focused on memorizing various pasta shapes.
Calculation
The SGMA uses an adaptive algorithm that adjusts task difficulty in real-time based on an individual’s performance, allowing it to measure both memory strength and forgetting rates for individual items. From this, the SGMA calculates the average forgetting rate across all items. The SGMA Index is then derived from this average.
The SGMA Index serves as a computational measure of how quickly information is forgotten, offering a mechanistic explanation for poor performance.
Shown here is the final calculated SGMA Index for a 57-year-old considered “below expected” for their age.
Interpretation
The SGMA Index provides insight into memory performance by measuring the probability of retrieval over time.
Shown here is an illustration of the relationship between the SGMA Index and the predicted time it takes to forget information. The dashed line represents the forgetting threshold, defined as the point where the probability of retrieving a memory falls below 5%.
- 100: Reflects the memory performance of an average 18-year-old.
- 75: Typical for healthy elderly adults.
- 55: Commonly associated with elderly adults experiencing mild cognitive impairment.
Applications
Clinical Diagnostics
Research
Treatment Monitoring
Enhance early detection and impairment monitoring
Learn more
Study memory function across varied populations
Learn more
Track the effectiveness of interventions
Learn more
Interested in collaborating with us?
Reach out to our dedicated partners for school and publishers partnerships. We are looking forward to help you.
