The Simon effect under reversed visual feedback.

Our aim was to study the processes involved in the spatial coding of the body during actions producing multiple simultaneous effects. We specifically aimed to challenge the intentional-based account, which proposes that the effects used to code responses are those deemed relevant to the agent's goal. Accordingly, we used a Simon paradigm (widely recognized as a suitable method to investigate the spatial coding of responses) combined with a setup inducing a multimodal discrepancy between visual and tactile/proprioceptive effects (known to be crucial for body schema construction and action control).

The size coding of responses: The size of switches and the force feedback.

We aimed to understand which factors have a functional role in the size coding of responses, either the size of the switches or the force required to trigger each switch. This question is of relevance because it allows a better understanding of processes underlying action coding. In each trial, participants saw a small or large object.

Beyond grasping: Syllables processing influences mere manual keypress.

We aimed to better understand the link between vocalization and grasping. We especially test whether neurocognitive processes underlying this interaction are not grasping specific. To test this hypothesis, we used the procedure of a previous experiment, showing that silently reading the syllable KA and TI can facilitate power- and precision-grip responses, respectively.

The visual size is enough to automatically induce the potentiation of grasping behaviours.

Seeing objects usually grasped with a power or a precision grip (e.g., an apple vs a cherry) potentiates power- and precision-grip responses, respectively.

Anticipating the magnitude of response outcomes can induce a potentiation effect for manipulable objects.

Merely seeing large objects (e.g., apples) potentiates power grip whereas seeing small objects (e.

How does simulation of an observed external body state influence categorisation of an easily graspable object?

Several works have provided evidence of a resonant motor effect while observing a hand interacting with painful stimuli. The aim of this work is to show that participants are sensitive to the observation of an injured hand when they have to categorise an easily graspable object with their own hand. In Experiment 1, participants indicated whether or not photographs of objects (graspable or non-graspable, left or right oriented) could be grasped with their dominant hand, by tapping a key on a keyboard.