Researchers from University Rostock, Department of Sociology and Demography, developed the Cogstate Speed Composite (CSC) to reflect all possible Cogstate tasks of the Cogstate Brief Battery, from assessment 2A, in one measurement. Please note, during the third assessment two versions of the Cogstate have been administered making it impossible to copy paste the current results (sections: Mental health (Cogstate) and secondary & linked variables).
The CSC can be requested in the Lifelines catalogue or by email (data@lifelines.nl). When this data has been used in your research, you will have to include a reference to the following paper:
The researchers were in contact with the Cogstate Research Group, it was decided to calculate the CSC based on the Detection, Identification and One back task. As the Cogstate Research Group stated that speed (or reaction time) is not a primary outcome of the One Card Learning task. More information on the different tasks can be found on the Cogstate page.
The creation of the CSC consisted of three steps, listed below. Please note that calculations are performed for adults (18+) only.
The Rostock researchers listed the following points of attention:
Label English | Label Dutch | Code | Variable | Assessment | Age |
Age-group specific z-standardized 'identification task' speed | Leeftijdgroep specifieke z-gestandariseerde 'identification task' snelheid | cogstate_speedidn_all_c_1 | idn_speed_norm | 2A | 18+ |
Age-group specific z-standardized 'detection task' speed | Leeftijdgroep specifieke z-gestandariseerde 'detection task' snelheid | cogstate_speeddet_all_c_1 | det_speed_norm | 2A | 18+ |
Age-group specific z-standardized 'one back task' speed | Leeftijdgroep specifieke z-gestandariseerde 'one back' snelheid | cogstate_speedobk_all_c_1 | obk_speed_norm | 2A | 18+ |
cogstate speed composite: sum of cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 and cogstate_speedobk_all_c_1 | cogstate speed composite: de som van cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 en cogstate_speedobk_all_c_1 | cogstate_speedcomposite_all_c_1 | composite_speed | 2A | 18+ |
sum of all correct and incorrect 'idn', 'det', and 'obt' responses for cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 and cogstate_speedobk_all_c_1 | som van alle correcte en incorrecte 'idn', 'det', en 'obt' responses voor cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 en cogstate_speedobk_all_c_1 | cogstate_trialstotal_all_c_1 | cogstate_speed_total_trials | 2A | 18+ |
sum of all incorrect 'idn', 'det', and 'obt' responses (errors) for cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 and cogstate_speedobk_all_c_1 | som van alle incorrecte 'idn', 'det', en 'obt' responses (errors) voor cogstate_speedidn_all_c_1, cogstate_speeddet_all_c_1 en cogstate_speedobk_all_c_1 | cogstate_trialserror_all_c_1 | cogstate_speed_error_trials | 2A | 18+ |