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This study was funded by two grants from the MCIN/ AEI/10.13039/501100011033 (ref. PID2020-113996GB- I00 and PSI2017-82670-P) awarded to MMR., Brain function rapidly changes in the first 2 years of life. In the last decades, resting-state EEG has been widely used to explore those changes. Previous studies have focused on the relative power of the signal in established frequency bands (i.e., theta, alpha, and beta). However, EEG power is a mixture of a 1/f-like background power (aperiodic) in combination with narrow peaks that appear over that curve (periodic activity, e.g., alpha peak). Therefore, it is possible that relative power captures both, aperiodic and periodic brain activity, contributing to changes in electrophysiological activity observed in infancy. For this reason, we explored the early developmental trajectory of the relative power in theta, alpha, and beta frequency bands from infancy to toddlerhood and compared it with changes in periodic activity in a longitudinal study with three waves at age 6, 9, and 16 to 18 months. Finally, we tested the contribution of periodic activity and aperiodic components of the EEG to age changes in relative power. We found that relative power and periodic activity trajectories differed in this period in all the frequency bands but alpha. Furthermore, aperiodic EEG activity flattened between 6 and 18 months. More importantly, only alpha relative power was exclusively related to periodic activity, whereas aperiodic components of the signal significantly contributed to the relative power of activity in theta and beta bands. Thus, relative power in these frequencies is influenced by developmental changes of the aperiodic activity, which should be considered for future studies., Fundación Tatiana Pérez de Guzmán el Bueno, Predoctoral Fellowship in Neuroscience (2019), National Research Agency of Spain, PID2020-113996GB-I00, PSI2017- 82670-P, MCIN/AEI/10.13039/501100011033, PID2020-113996GB-I00, PSI2017-82670-P, MMR.

Recepción: 20 de mayo de 2016 | Revisión: 21 de mayo de 2016 | Aceptado: 30 de mayo de 2016, En el presente estudio se ha intentado comprobar cómo interactúan el empowerment psicológico, la satisfacción laboral y la identificación laboral. Además, se exploraron las consecuencias de la disminución de la retribución económica en el empowerment. Para ello, seleccionamos una muestra de diferentes grupos laborales que se habían visto afectados de manera desigual tras la crisis, concretamente: docentes, sanitarios y cuerpos de seguridad del estado. A partir de los datos obtenidos comprobamos que el componente económico del apoyo socio-político no es suficiente para predecir variaciones en el empowerment, así como tampoco variabilidad en la satisfacción e identificación de cada grupo. No obstante, sí que encontramos una relación significativa positiva entre satisfacción-empowerment e identificación-empowerment, tal y como se esperaba, pero no entre identificación-satisfacción., The aim of this study was to determine how psychological empowerment, work satisfaction and organizational identification interact. In addition, we explored how reduction in wages and benefits affected empowerment. To this end, we selected a sample of teachers, public health and law enforcement workers, who were affected in different ways by the financial crisis. The results obtained show that the economic aspect of socio-political support is not sufficient to predict the variability of empowerment, satisfaction nor identification for each group. However, we did find a significant positive relationship between satisfaction-empowerment and identification-empowerment, as expected, but not between identification-satisfaction., Universidad de Granada. Departamento de Psicología Social. Proyecto de Innovación Docente ReiDoCrea