The sense of subjectivity is the feeling of controlling one's own actions, and when the error between the prediction and the result of the action is small, one feels that "this action was caused by oneself" and feels the sense of subjectivity. You can experience it.
In a previous study, Kazuki Hayashida and Shu Morioka, a doctoral student at Kio University's graduate school, reported that high perceptual motor ability amplifies the sense of subjectivity.However, it was unclear what factors affected the sense of subjectivity, so this time, by simultaneously executing the perceptual movement task including implicit rules and the intentional binding task to quantitatively measure the sense of subjectivity. , We investigated the effect of the experience of noticing the rules during the exercise task on the sense of subjectivity.
We asked 29 healthy people who participated in the experiment to work on a perceptual movement task in which an object that repeatedly moves horizontally is stopped at the center of the screen by pressing a key.There are 5 levels of movement speed of the object, and an implicit rule is set that switches from speed 1 to speed 5 every second and loops.After the experiment was completed, we asked them if they noticed the rules, and divided the participants into "awareness group" and "unawareness group" and compared them.
At the same time, we set the sound to be heard with a delay of several hundred ms from the key press, and asked the participants to estimate the time interval from when the key was pressed until the sound was heard.It can be considered that the shorter the time interval is, the more the sense of subjectivity is amplified (intentional binding effect).
This experiment was carried out over 10 blocks (180 trials in total), and the time-series changes in the motor task and intentional binding effect were investigated in the early, middle, and late stages of the experiment.As a result, the intentional binding effect was gradually amplified in the conscious group as compared with the unaware group.In other words, it was suggested that awareness of the rules amplifies the sense of subjectivity.
This result, which shows that awareness may affect the sense of action subject, is expected to help clarify the transformation process of the sense of action subject.
Paper information:[Brain Sciences] Intentional Binding Effects in the Experience of Noticing the Regularity of a Perceptual-Motor Task
