Where do sense end and beliefs begin? Say there are two philosophers who’s explanatory styles match their philosophical ideologies. Philosopher A is an idealist. He is also Schizophrenic. When he hears a voice he attributes it to his mind. When he hears his son talk to him he also attributes it to his mind. Philosopher B is an externalist. He also has OCD, predominately obsessional. When he hears a voice it ″echoes″ as thoughts in his mind, sometimes much later than when he heard it. When he hears his daughter talk or her voice echoing in his head he attributes it to the world at large.
Note: auditory hallucinations are distinguished from self-talk by their location in the external world.
“Our ability to talk to ourselves and think in words is a major part of the human experience of consciousness. From an early age, individuals are encouraged by society to introspect carefully, but also to communicate the results of that introspection.[2] Simon Jones and Charles Fernyhough cite research suggesting that our ability to talk to ourselves is very similar to regular speech.[3] This theory originates with the developmental psychologist Lev Vygotsky, who observed that children will often narrate their actions out loud before eventually replacing the habit with the adult equivalent: sub-vocal articulation. During sub-vocal articulation, no sound is made but the mouth still moves. Eventually, adults may learn to inhibit their mouth movements, although they still experience the words as “inner speech”.[3][4]
Jones and Fernyhough cite other evidence for this hypothesis that inner speech is essentially like any other action. They mention that schizophrenics suffering auditory verbal hallucinations (AVH) need only open their mouths in order to disrupt the voices in their heads. To try and explain more about how inner speech works, but also what goes wrong with AVH patients, Jones and Fernyhough adapt what is known as the “forward model” of motor control, which uses the idea of “efferent copies”.[3]”″
A forward model of motor control. Notice that a prediction of the future state is made just before the movement occurs. Presumably that efference copy is used to establish agency.
In a forward model of motor control, the mind generates movement unconsciously. While information is sent to the necessary body parts, the mind basically faxes a copy of that same information to other areas of the brain. This “efferent” copy could then be used to make predictions about upcoming movements. If the actual sensations match predictions, we experience the feeling of agency. If there is a mismatch between the body and its predicted position, perhaps due to obstructions or other cognitive disruption, no feeling of agency occurs.[3]
Jones and Fernyhough believe that the forward model might explain AVH and inner speech. Perhaps, if inner speech is a normal action, then the malfunction in schizophrenic patients is not the fact that actions (i.e. voices) are occurring at all. Instead, it may be that they are experiencing normal, inner speech, but the generation of the predictive efferent copy is malfunctioning. Without an efferent copy, motor commands are judged as alien (i.e. one does not feel like they caused the action). This could also explain why an open mouth stops the experience of alien voices: When the patient opens their mouth, the inner speech motor movements are not planned in the first place.[3
Where do sense end and beliefs begin? Say there are two philosophers who’s explanatory styles match their philosophical ideologies. Philosopher A is an idealist. He is also Schizophrenic. When he hears a voice he attributes it to his mind. When he hears his son talk to him he also attributes it to his mind. Philosopher B is an externalist. He also has OCD, predominately obsessional. When he hears a voice it ″echoes″ as thoughts in his mind, sometimes much later than when he heard it. When he hears his daughter talk or her voice echoing in his head he attributes it to the world at large.
Note: auditory hallucinations are distinguished from self-talk by their location in the external world.
“Our ability to talk to ourselves and think in words is a major part of the human experience of consciousness. From an early age, individuals are encouraged by society to introspect carefully, but also to communicate the results of that introspection.[2] Simon Jones and Charles Fernyhough cite research suggesting that our ability to talk to ourselves is very similar to regular speech.[3] This theory originates with the developmental psychologist Lev Vygotsky, who observed that children will often narrate their actions out loud before eventually replacing the habit with the adult equivalent: sub-vocal articulation. During sub-vocal articulation, no sound is made but the mouth still moves. Eventually, adults may learn to inhibit their mouth movements, although they still experience the words as “inner speech”.[3][4]
Jones and Fernyhough cite other evidence for this hypothesis that inner speech is essentially like any other action. They mention that schizophrenics suffering auditory verbal hallucinations (AVH) need only open their mouths in order to disrupt the voices in their heads. To try and explain more about how inner speech works, but also what goes wrong with AVH patients, Jones and Fernyhough adapt what is known as the “forward model” of motor control, which uses the idea of “efferent copies”.[3]”″
A forward model of motor control. Notice that a prediction of the future state is made just before the movement occurs. Presumably that efference copy is used to establish agency.
In a forward model of motor control, the mind generates movement unconsciously. While information is sent to the necessary body parts, the mind basically faxes a copy of that same information to other areas of the brain. This “efferent” copy could then be used to make predictions about upcoming movements. If the actual sensations match predictions, we experience the feeling of agency. If there is a mismatch between the body and its predicted position, perhaps due to obstructions or other cognitive disruption, no feeling of agency occurs.[3]
Jones and Fernyhough believe that the forward model might explain AVH and inner speech. Perhaps, if inner speech is a normal action, then the malfunction in schizophrenic patients is not the fact that actions (i.e. voices) are occurring at all. Instead, it may be that they are experiencing normal, inner speech, but the generation of the predictive efferent copy is malfunctioning. Without an efferent copy, motor commands are judged as alien (i.e. one does not feel like they caused the action). This could also explain why an open mouth stops the experience of alien voices: When the patient opens their mouth, the inner speech motor movements are not planned in the first place.[3