SZ - Altered Awareness of Action (Voss et al 2010) Flashcards
What does this paper suggest about SZ agency?
Increase
Which two components are involved in agency?
Predictive
Retrospective
How did they measure agency?
Asked SZ and non-SZ subject to press button
Tone was either played or not played
Estimate at which clock-hand position they pressed the button
Which component of agency is deficient in SZ?
Predictive
Retrospective agency systems are overactive in SZ
T/F
True
Which other studies displayed enhanced agency and how?
Franck et al 2001
Fourneret et al 2002
Asked if visual cue was a result of their own action
SZ more inclined to say yes
Outline the key mechanism of agency
Associating one’s own actions and the effect of these upon the external world
What is intentional binding?
Occurs between external effect and action
When the action repeatedly is followed by the effect
How did this study determine enhanced agency?
SZ patients perception of the time when the button was pressed was shifted toward the tone at a higher rate than controls
When no tone, still inclined to pick a later time than controls
What link was demonstrated between SZ clinical picture and sense of agency?
Stronger the positive symptoms, the less prediction ability was noted
Intentional binding was increased in non-SZ patients
T/F
F
Intentional binding was increased in SZ, explaining the enhanced sense of agency
