PHIL 125 Practice 4
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University of British Columbia *
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125
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Philosophy
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Feb 20, 2024
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2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning Paost-prob(Hypothesis Hi about sample correct TF E observed in data collecticn setup and zuxiliar:es B1-Bn about cample ase all rnrrcct) [Pred-prob{E obscsved in data collection sctup 11 Hypothesis Hi about sample and auxiliaries B1-Bn abour sample are all corrzcr) X Prior-prob(Hypothesis Hi about sample correct)] Sp [Pred-prob(E observed in data collection setup IF Hypothesis H1 ahnllt sample and auxiliaries B1-Bn abour sample are all correet) X Prior-prob(Hypothesis H1 about sample correct)] + [Pred- prob(E cbserved in data collection setup IF Hypothesis H2 about sample and auxiliaries B1-Bn about sample are all correet) X Prior-prob(Hypcthesis H2 abcurt sample correct)] + ... + [Pred- prob(E cbscrved in data collection sctup IF Hypothesis Hn about sample and auxiliaries B1-Bn about sample are all correet) X Prior-prob(Hypothesis Hn about sample correct]] Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table D linked above. In order to get a final result we want to use Bayes's theorem formula. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. E = Observational data in Row2 and Row4 of the table. Prior-prob(H1) = 0.5 Prior-prob(H2) = What is the Posterior-prob for H1 given this E? Posterior-prob(H1 given E) = 1 Posterior-prob(H1 given E) > 0 but < 1 Posterior-prob(H1 given E) = 0.5 Posterior-prob(H1 given E) =0 IncorrectQuestion 2 0/1 pts https://canvas.ubc.ca/courses/132235/quizzes/708100 2/10
2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning Suppose H = The corpus callosum has no function or at least it has nothing to do with information transmission from one hemisphere of the human brain to the other. Information is transmitted from one hemisphere of the human brain to the other, just not by the corpus callosum. E = Someone has an uncut and intact corpus callosum. In the special experimental setup pictured above when this person is shown a picture of a cup in the left side of their visual field and a spoon in the right side of their visual field and is asked to draw what they saw with their left hand, the person draws a cup. You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) Prediction-prob(E if Hand B) = 1 Prediction-prob(E if Hand B) > 0 Prediction-prob(E if Hand B) = 0 https://canvas.ubc.ca/courses/132235/quizzes/708100 3/10
2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning Question 3 1/1 pts Parl ulread wodd | hpulhoses finlended popti, aboul pet red asped) world y 1 Datla colkexdion Hypathesia ¥ (nes mplicsions Ereo L Conaisinn hr Intenced popn Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table A linked above. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. Nothing else in the human body has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. Something else in the human body has this function. E = Observational data in Row1 and Row3 of the table. You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) What is the result for H2 given this E and B? H2 is true or correct https://canvas.ubc.ca/courses/132235/quizzes/708100 4/10
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2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning H2 might be true or correct H2 isn't true or correct IncorrectQuestion 4 0/1pts Parl ulread wodd | hpulhcses finlended popt, aboul pet red asped) world y 1 Dala colkedion hesk ek prineicd mplkeations (BTG RO aboud dsla Conaisinn hr Intenced poph Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table F linked above. | H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. Nothing else in the human body has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. Something else in the human body has this function. E = Observational data in Row2 and Row3 of the table. What is the result for H1 given this E and B? You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and https://canvas.ubc.ca/courses/132235/quizzes/708100 5/10
2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) H1 is true or correct H1 might be true or correct H1 isn't true or correct IncorrectQuestion 5 0/1 pts Parl ulread wodd | hpulhoses finlended popti, aboul pet red asped) world y 1 Datla colkexdion Hypathesia ¥ (nes mplicsions Ereo L Py | generslzshbie 1n Conaisinn hr Intenced popn Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table B linked above. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. There is no other part of the human body that has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. There is another part of the human body that has this function. E = Observational data in Row1 and Row3 of the table. What is the result for H2 given this E and B? You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are https://canvas.ubc.ca/courses/132235/quizzes/708100 6/10
2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) H2 is true or correct H2 might be true or correct H2 isn't true or correct IncorrectQuestion 6 0/1 pts Parl ulread wodd | hpulheses firended popt, aboul pard rea asped) world y v Dala colkedion Hypoihesis ¥ (e mplisions (RRTRR. dpod) argxn iala Conaisinn hr Intenced poph Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table A linked above. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. Nothing else in the human body has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. Something else in the human bidy has this function. E = Observational data in Row1 and Row3 of the table. What is the result for H1 given this E and B? You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and https://canvas.ubc.ca/courses/132235/quizzes/708100 7/10
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2/16/24, 9.04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) H1 is true or correct H1 might be true or correct H1 isnt true or correct Question 7 1/1 pts Parl ulread wodd | hpulheses firended popt, aboul pard rea asped) world y v Dala colkedion Hypoihesis ¥ (e mplisions (RRTRR. dpod) argxn iala Conaisinn hr Intenced poph Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table F linked above. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. There is no other part of the human body that has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. In fact, nothing in the human body has that function. H3 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. Something else in the human body has that function. E = Observational data in Row 4 and Row 5 and Row 6 of the table. What is the result for H3 given this E and B? You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the https://canvas.ubc.ca/courses/132235/quizzes/708100 8/10
2/16/24, 9.04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) H3 is true or correct H3 might be true or correct H3 is not true or correct IncorrectQuestion 8 0/1pts Parl ulread wodd | hpulhcses finlended popt, aboul pet red asped) world y 1 Dala colkedion hesk e i mplksiions e, T Conaisinn hr Intenced poph Suppose the parts of an investigation of the function of the corpus callosum in the human brain can be summarized as in Table F linked above. H1 = The function of the corpus callosum is to transmit information between the hemispheres of the human brain. There is no other part of the human body that has this function. H2 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. In fact, nothing in the human body has that function. H3 = The function of the corpus callosum is not to transmit information between the hemispheres of the human brain. Something else in the human body has that function. https://canvas.ubc.ca/courses/132235/quizzes/708100 9/10
2/16/24, 9:04 PM E1 Practice 4 Split Brains Bayes: PHIL 125 003 2023W2 Introduction to Scientific Reasoning E = Observational data in Row1 and Row2 and Row 3 of the table. What is the result for H2 given this E and B? You can assume as background B that (a) In everyone -- or at least in anyone put into the special testing setup -- information displayed on the left side of the screen in the special experimental setup goes into the right hemisphere of the viewer's brain and information displayed on the right side of the screen in the special experimental setup goes into the left hemisphere of the viewer's brain. and (b) In everyone -- or at least in anyone put into the special testing setup -- left hand and arm movements are controlled by the right hemisphere of the person's brain and right hand and arm movements are controlled by the left hemisphere of the person's brain and (c) In everyone -- or at least in anyone put into the special testing setup -- cutting the corpus callosum has no effect on (a) and (b) H2 is true or correct H2 might be true or correct H2 is not true or correct Quiz Score: 2 out of 8 https://canvas.ubc.ca/courses/132235/quizzes/708100 10/10
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