| lifespan {galamm} | R Documentation |
Simulated Dataset with Lifespan Trajectories of Three Cognitive Domains
Description
This dataset is simulated based on the data used in Section 4.1 of Sørensen et al. (2023).
Usage
lifespan
Format
lifespan A data frame with 54,457 rows and 7 columns:
- id
Subject ID.
- domain
Cognitive domain being measured. One of
"epmem"for episodic memory,"wmem"for working memory and"execfun"for executive function/speed.- timepoint
Integer indicating the timepoint number.
- age
Age of participant at the timepoint.
- test
The particular test at this observation.
- y
Response. For
"epmem"and"wmem"this is the number of successes in 16 trials. For"execfun"it is the time in seconds to complete the task.- retest
Integer indicating whether the participant has taken the test at a previous timepoint.
- domainepmem
Dummy variable for
domain=="epmem".- domainwmem
Dummy variable for
domain=="wmem".- domainexecfun
Dummy variable for
domain=="execfun".
References
Sørensen Ø, Fjell AM, Walhovd KB (2023). “Longitudinal Modeling of Age-Dependent Latent Traits with Generalized Additive Latent and Mixed Models.” Psychometrika, 88(2), 456–486. ISSN 1860-0980, doi:10.1007/s11336-023-09910-z.
See Also
Other datasets:
cognition,
diet,
epilep,
hsced,
latent_covariates,
latent_covariates_long,
mresp,
mresp_hsced