Lesson test: The evidence from the brain

1.[2p]
In Libet's 1983 study, how many milliseconds before muscle onset did the readiness potential for spontaneous movements begin?

CorrectNot quite: 550

4.[3p]
What did Libet himself conclude from the gap?

Conscious will acts as an editor with a short window to veto the movement, not as the initiator

Correct

Free will is an illusion produced by the brain

The answer is: Conscious will acts as an editor with a short window to veto the movement, not as the initiator

The readiness potential is an artefact of averaging

The answer is: Conscious will acts as an editor with a short window to veto the movement, not as the initiator

Subjects cannot time their own mental events

The answer is: Conscious will acts as an editor with a short window to veto the movement, not as the initiator

5.[3p]
In the 2008 fMRI decoding study, what was the prediction accuracy?

About 60 percent, against a chance level of 50

Correct

About 95 percent, against a chance level of 50

The answer is: About 60 percent, against a chance level of 50

About 80 percent, against a chance level of 25

The answer is: About 60 percent, against a chance level of 50

Exactly 100 percent, several seconds ahead

The answer is: About 60 percent, against a chance level of 50

6.[3p]
What does the stochastic accumulator model say the readiness potential is?

The average of spontaneous fluctuations selected because they happened to reach the movement threshold

Correct

A decision signal generated in the supplementary motor area

The answer is: The average of spontaneous fluctuations selected because they happened to reach the movement threshold

An artefact of the electrodes used in the 1960s

The answer is: The average of spontaneous fluctuations selected because they happened to reach the movement threshold

The neural correlate of the conscious urge to move

The answer is: The average of spontaneous fluctuations selected because they happened to reach the movement threshold

7.[3p]
What prediction did the accumulator model make that was confirmed?

Reaction times to an interrupting cue depend on where the fluctuation was when the cue arrived

Correct

The readiness potential should be absent in patients with epilepsy

The answer is: Reaction times to an interrupting cue depend on where the fluctuation was when the cue arrived

Awareness should be reported before the readiness potential

The answer is: Reaction times to an interrupting cue depend on where the fluctuation was when the cue arrived

Decoding accuracy should reach 90 percent

The answer is: Reaction times to an interrupting cue depend on where the fluctuation was when the cue arrived

8.[2p]
Maoz and colleagues reported in 2019 that the readiness potential is largely absent before deliberate choices with real stakes.

True

Correct

False

The answer is: True

9.[3p]
What do these experiments establish?

Select all that apply

Preparation for movement is underway before people report noticing an intention

Correct

Reports of the moment of awareness are partly reconstructed after the fact

Correct

The folk picture of a conscious self starting the causal chain from outside is not supported

Correct

The brain is deterministic

The answer is: Preparation for movement is underway before people report noticing an intention, Reports of the moment of awareness are partly reconstructed after the fact, The folk picture of a conscious self starting the causal chain from outside is not supported

Sign in

The evidence from the brain

1.[2p]
In Libet's 1983 study, how many milliseconds before muscle onset did the readiness potential for spontaneous movements begin?

2.[2p]
How many milliseconds before muscle onset did subjects report first becoming aware of the urge to move?

3.[2p]
How many milliseconds, therefore, separate the readiness potential from the reported moment of awareness?

4.[3p]
What did Libet himself conclude from the gap?

5.[3p]
In the 2008 fMRI decoding study, what was the prediction accuracy?

6.[3p]
What does the stochastic accumulator model say the readiness potential is?

7.[3p]
What prediction did the accumulator model make that was confirmed?

8.[2p]
Maoz and colleagues reported in 2019 that the readiness potential is largely absent before deliberate choices with real stakes.

9.[3p]
What do these experiments establish?

1.[2p] In Libet's 1983 study, how many milliseconds before muscle onset did the readiness potential for spontaneous movements begin?

2.[2p] How many milliseconds before muscle onset did subjects report first becoming aware of the urge to move?

3.[2p] How many milliseconds, therefore, separate the readiness potential from the reported moment of awareness?

4.[3p] What did Libet himself conclude from the gap?

5.[3p] In the 2008 fMRI decoding study, what was the prediction accuracy?

6.[3p] What does the stochastic accumulator model say the readiness potential is?

7.[3p] What prediction did the accumulator model make that was confirmed?

8.[2p] Maoz and colleagues reported in 2019 that the readiness potential is largely absent before deliberate choices with real stakes.

9.[3p] What do these experiments establish?

1.[2p]
In Libet's 1983 study, how many milliseconds before muscle onset did the readiness potential for spontaneous movements begin?

2.[2p]
How many milliseconds before muscle onset did subjects report first becoming aware of the urge to move?

3.[2p]
How many milliseconds, therefore, separate the readiness potential from the reported moment of awareness?

4.[3p]
What did Libet himself conclude from the gap?

5.[3p]
In the 2008 fMRI decoding study, what was the prediction accuracy?

6.[3p]
What does the stochastic accumulator model say the readiness potential is?

7.[3p]
What prediction did the accumulator model make that was confirmed?

8.[2p]
Maoz and colleagues reported in 2019 that the readiness potential is largely absent before deliberate choices with real stakes.

9.[3p]
What do these experiments establish?