TABLE 2.
Descriptions of cognitive measures.
| Cognitive measure | Domain assessed | Test description | Outcome measure |
| MoCA | |||
| Kiswahili MoCA | Neurocognitive Screening | Screens short- and long-term memory recall, visual spatial abilities, executive functioning, attention, concentration, and working memory. | A subject is able to obtain a total of 30 points. Higher scores represent better performance. |
| TOVA | |||
| Response Time (RT) | Attention, processing speed (RT-ms) | Correct response time mean. Measures quickness of response time in milliseconds. | The mean response time of the correct responses. Lower = better. |
| Ex-Gaussian μ (ExGμ) | Attention, processing speed (ExGμ-ms) | The mean response time (in milliseconds) of the correct responses, modeled using the Ex-Gaussian distribution. | This score takes into account the skew in distribution of reaction time scores. Lower = better. |
| Cogstate | |||
| One Card Learning (OCL) | Visual leaning accuracy* (OCL-acc) | Accuracy of performance; arcsine square root proportion correct. | Accuracy is the primary outcome for OCL. Higher scores = better. |
| Visual learning speed (OCL-lmn) | Speed of performance; mean of the log10 transformed reaction times for correct responses. | Speed of processing is the secondary outcome measure for OCL. Lower score = better | |
| One Back Test (ONB) | Working memory accuracy (ONB-acc) | Accuracy of performance; arcsine square root proportion correct. | Accuracy is the secondary outcome for ONB. Higher scores = better. |
| Working memory speed* (ONB-lmn) | Speed of performance; transformed reaction times for correct responses. | Speed of processing is the primary measure for ONB. Lower score = better | |
All cognitive measures, the domain they assess, a description of the test, and the outcome measures are listed for the entire study. MoCA, Montreal Cognitive Assessment; TOVA, Test of Variables of Attention. ∗Indicates the primary variable of interest for Cogstate subtest.