Examining reaction time variability on the stop-signal task in the ABCD study.
J Int Neuropsychol Soc
; 29(5): 492-502, 2023 06.
Article
en En
| MEDLINE
| ID: mdl-36043323
ABSTRACT
OBJECTIVE:
Reaction time variability (RTV) has been estimated using Gaussian, ex-Gaussian, and diffusion model (DM) indices. Rarely have studies examined interrelationships among these performance indices in childhood, and the use of reaction time (RT) computational models has been slow to take hold in the developmental psychopathology literature. Here, we extend prior work in adults by examining the interrelationships among different model parameters in the ABCD sample and demonstrate how computational models of RT can clarify mechanisms of time-on-task effects and sex differences in RTs.METHOD:
This study utilized trial-level data from the stop signal task from 8916 children (9-10 years old) to examine Gaussian, ex-Gaussian, and DM indicators of RTV. In addition to describing RTV patterns, we examined interrelations among these indicators, temporal patterns, and sex differences.RESULTS:
There was no one-to-one correspondence between DM and ex-Gaussian parameters. Nonetheless, drift rate was most strongly associated with standard deviation of RT and tau, while nondecisional processes were most strongly associated with RT, mu, and sigma. Performance worsened across time with changes driven primarily by decreasing drift rate. Boys were faster and less variable than girls, likely attributable to girls' wide boundary separation.CONCLUSIONS:
Intercorrelations among model parameters are similar in children as has been observed in adults. Computational approaches play a crucial role in understanding performance changes over time and can also clarify mechanisms of group differences. For example, standard RT models may incorrectly suggest slowed processing speed in girls that is actually attributable to other factors.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Trastorno por Déficit de Atención con Hiperactividad
Tipo de estudio:
Prognostic_studies
Límite:
Adult
/
Child
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Int Neuropsychol Soc
Asunto de la revista:
NEUROLOGIA
/
PSICOLOGIA
Año:
2023
Tipo del documento:
Article
País de afiliación:
Estados Unidos