Ivan Grahek

Slower transitions between control states lead to reductions in cognitive flexibility over the lifespan

This study shows that slower transitions between cognitive control states in older adults reduce cognitive flexibility, despite preserved ability to reach target states when given sufficient time.

Control adjustment costs limit goal flexibility: Empirical evidence and a computational account

The paper demonstrates control adjustment costs when people change goals and validates a dynamical systems model explaining these costs through four experiments.

Learning when effort matters: Neural dynamics underlying updating and adaptation to changes in performance efficacy

This study investigates how people update their beliefs about performance efficacy and adjust cognitive control based on these beliefs using computational modeling and EEG.

Dynamic interplay between reward and voluntary attention determines stimulus processing in visual cortex

This study investigates how reward and voluntary attention interact to influence stimulus processing in the visual cortex using a task involving global motion detection and SSVEP measurements.

Motivation and Cognitive Control in Depression

This paper proposes a framework connecting motivational and cognitive impairments in depression using computational models of cognitive control.