Fall 2006

Minds, Brains, and Computers

Cognitive Science 050.109      MW 2:00 - 3:30      Krieger 304

 

Prof. Paul Smolensky

OH: Th 11:00 – 12:00

Krieger 241B

smolensky@cogsci.jhu.edu

T.A.s Manny Vindiola

OH: W 1:00 – 2:00

Krieger 234B

vindiola@cogsci.jhu.edu

Adam Wayment

OH: M 3:30 – 4:45

Krieger 245

wayment@cogsci.jhu.edu

 

 

Course goal                  To understand how modern cognitive science studies the mind as a kind of abstract computer, and the brain as a kind of physical computer.

Prerequisites                The material is somewhat philosophical/abstract/formal/mathematical. Calculus is recommended, more for general mathematical experience than for specific content. (Actual use of calculus will not be required in problem sets or exams, except possibly for extra credit.)

                                   Be advised: the class is 100-level because it has no prerequisites, not because it is easy.

                                   No knowledge of computer programming is required; only abstract — non-physical — computers will be employed.

Requirements               20%      Four required reading summaries

20%      Two problem sets

40%      Two take-home mid-term exams

  5%      Class participation (Attendance will be taken and is required! Slides will not be posted.)

15%      A final paper [or 3 elective reading summaries]

(Percentages may be revised slightly.)

Note                No incompletes will be given. Any requests for deviations from course requirements or due dates must be based on serious, unavoidable problems (e.g., illness) that are documented in writing by academic advising.

                       The course carries N, S, Q, credit (biology; philosophy/psychology/linguistics; mathematics/computer science). The course does not carry W credit.

Reading write-ups         Many classes are marked with an asterisk* on the course schedule below. On four of these days, a write-up on the reading must be turned in at the beginning of class (these four must include one write-up for each of the two tracks a student selects; see below). Each write-up addresses the reading indicated in that row of the schedule. 

In a write-up, it is expected that you will

1.       Explain two or three of the most important concepts or points of the reading. You should not attempt to cover the entire reading, or even the majority of the reading; allow yourself the possibility of getting into each point to a little depth. You might want to address questions such as: What are the primary questions the reading is trying to answer? What answers are proposed? What arguments or evidence support the proposed answers? It’s important to be as precise as you can.

2.       Especially in the second half of the course (but also in the first half if you can): identify points in the reading which seem particularly important in relating the computation architecture of the brain to the computational architecture of the mind. Do the mind and brain perspectives seem compatible or contradictory?

Answers are expected to be about 2–3 typed double-spaced pages of prose. Alternatively, students familiar with argument diagrams may choose that format (normally, one page per assignment).

Reading summaries will not be corrected in detail, but will simply be marked T (4 points), T- (2 points), or T-- (1 point). Students can receive more detailed feedback on their written work at any time by taking copies of their assignments to discuss with the professor or TA during office hours. Students are advised to keep a copy of all their assignments (including problem sets).

Problem sets                Two problem sets are required; these address the technical aspects of the course material and are essential preparation for the two mid-term exams.

Due dates                    These are serious. For reading summaries, for each day the assignment is late, a deduction in credit of 1 point (out of 4) will be assessed; for problem sets, the deduction is 4 points (out of 10) for each day late. For exams, due dates/times are inviolable; exams not received by the due date/time will receive no credit.

Exams                          There are two mid-term exams; each covers the lectures and reading material assigned since the previous exam.

Exams will focus on material discussed in class, but may also relate to any material contained in the readings.

Exams will be take-home, open-book, open-notes; they will require original thinking and problem-solving. Exams will be scrutinized, and suspected cases of cheating will be referred to academic advising for evaluation.

Out-of-class problem-solving and exam review sessions will be held.

There is no final exam.

Tracks                         Each student will elect two of the following tracks to pursue:
AI (Artificial Intelligence)
Linguistics
Math
Neuroscience
Psychology

If a particular track is selected by a student, then the student must (i) attend the  special lecture for that track; (ii) do a special advanced reading for that track and turn in a reading summary, and (iii) answer the track’s special exam question (on the first exam following the track’s special lecture). A student must have committed to two tracks by the end of the semester, but may pursue multiple ones until then. (Any work associated with additional tracks beyond the two declared by the student at the end of the semester will count for some amount of extra credit.) Note: For the Math track, an extra problem on Problem Set 2 will take the place of a reading summary — there will be no extra required reading for this track; the special lecture will contain the additional material.

Final paper                  The paper should explore issues from the course that bear on the student’s two selected tracks; ideally, the paper should relate those two to each other. Students should relate any new material they read to material covered in class. Additional reading material from the texts that relate to the various tracks will be pointed out in lecture; students are also invited to speak to the professor for suggested readings relating to a student’s particular interests.

Papers are expected to run about 8–10 pages (typed, double-spaced, 11-pt font, 1" margins).

L

 
                                   Wuss option: Three extra weekly assignments may substitute for a paper — these must be turned in on the relevant due date, not at the end of the semester.

Readings                      Most are from the textbooks in the bookstore. All are available (during regular business hours) for 1-hour borrowing from Krieger 230.

 

References

 

Anderson, John R. 1982. Acquisition of cognitive skill. Psychological Review 89: 369−403. [see hyperlinks in schedule]

Bechtel, William, and Adele Abrahamsen. 2002. Connectionism and the mind: Parallel processing, dynamics, and evolution in networks. Blackwell.

Churchland, Patricia S. & Terrence J. Sejnowski. 1992. The computational brain. MIT Press.

Available to the Johns Hopkins community at:

http://cognet.mit.edu/library/books/view?isbn=0262531208.

Frank, Robert. 1998. Structural analysis. In A companion to cognitive science, eds. William Bechtel and George Graham, 450−462. Blackwell. [see hyperlink in schedule]

Haugeland, John. 1985. Artificial Intelligence: The very idea. MIT Press.

Prince, Alan & Paul Smolensky. 1997. Optimality: From neural networks to universal grammar. Science 275: 1604–1610. [reprints provided; also, see hyperlink in schedule]

Smolensky, Paul, and Géraldine Legendre. 2006. The Harmonic Mind: From Neural Computation to Optimality-Theoretic Grammar. Vol. 1. Cognitive architecture. Vol. 2. Linguistic and philosophical implications. MIT Press. [see hyperlink in schedule]

 

 


Class Schedule    (subject to change — last update: Sept. 13)

Dates*

Topic

Reading

Part I:  The mind is an abstract symbolic computer

Text:  Artificial Intelligence: The Very Idea, Haugeland (H) (plus articles)

Sept 11

Overview

 

Sept 13*

What is a ‘mind’?

H: (Introduction), Ch. 1

Sept 18, 20*

Abstract computation: Formal systems

H: Ch. 2

Sept 25*

Meaning: Interpreted formal systems

H: Ch. 3

Sept 27 -  Oct 6

Problem Set  1  Given out at end of class Wed Sept 27;  due 1 pm Fri Oct 6

Sept 27

Cognitive architecture; Abstract computers

H: Ch. 4

Oct 2*

 Symbolic structure in linguistics

 R. Frank article

Oct 4*

 Symbolic structure in problem solving & Wrap-up 1

 J. R. Anderson article pp. 369-382
    [Complete Anderson article]

Oct 9 - 20

Exam  1  Given out at end of class Mon Oct 9; due 11 am Fri Oct 20

Part IIa:  The brain as a physical computer

Text:  The Computational Brain, Churchland & Sejnowski (C&S)

Oct 9, 11*

Processing in the brain

C&S: pp. 1-60 [chs. 1-2]

Oct 18, 23*

Representation in the brain

C&S: pp. 141-183 [in ch. 4]

Part III:  The mind is an abstract connectionist machine

Text:  Connectionism and the Mind, Bechtel & Abrahamsen (B&A)

Oct, 25*

The connectionist theory of mind

B&A: Ch. 1

Oct 30*

Connectionist processing

B&A: Ch. 2

Nov 1 - 13

Problem Set  2Given out at end of class Wed Nov 1; due 1 pm Mon Nov 13

Nov 1*

Connectionist learning

B&A: Ch. 3

Nov 6*

Connectionist theory

Handout

Nov 8*

Pattern recognition and cognition

B&A: Ch. 4

Nov 13*

Connectionism and rules

B&A: Ch. 5

Nov 15 - Dec 4

Exam  2 Given out at end of class Wed Nov 15; due 1 pm Mon Dec 4

Nov 15*

Connectionism and representation

B&A: Ch. 6

Nov 20*

 Connectionism and cognitive neuroscience

 B&A: Ch. 10

Nov 22

Wrap-up 2

 

Part IIb:  The brain as an abstract connectionist machine

Text:  The Computational Brain, Churchland & Sejnowski (C&S)

Nov 27*

The connectionist theory of brain function I

C&S: pp. 183-188, 221-238  [in ch. 4]

Nov 29*

The connectionist theory of brain II

[part of C&S: pp. 239-305 in ch. 5?]

Part IV:  Unifying the mind/brain

Text:  The Harmonic Mind,  Smolensky & Legendre  (S&L)  (plus article)

Dec 4*

Symbols from neurons

S&L: Ch. 1 

Dec 6*

Rules from connections

Prince & Smolensky article

Dec 11

Course wrap-up

 

Final Exam day: Dec 18

Final Paper Due, 1 pm Mon Dec 18 (no final exam)

Drop deadline        *Possible date for reading write-up

 


Student Questionnaire

 

Name:

E-mail address (please print carefully):

Year (freshman, etc.):

Major (or interest area, if known):

Current status in this course (enrolled, etc.):

Estimated probability of taking the course:

How did you hear about this course, and what attracted you here?

 

 

 

Have you taken Cognition, 050.101? ________. Other Cognitive Science Department courses you’ve taken:

 

 

 

 

For each of the following general areas, indicate the background you may already have, what you may be hoping to get from this course in that area, and what, if any, ultimate goals you may have in that area (you need not repeat information above). In the box on the left indicate your level of familiarity with the area, on the following scale:

                1 = no familiarity;   2 = little familiarity;  3 = basic coursework;  4 = advanced coursework

Familiarity
        level

philosophy:

psychology:

neuroscience:

computer science:

mathematics:

other cognitive science:

other background (e.g., coursework, research) you may wish to mention:

Likely candidates for your tracks:

Any comments, questions, requests, etc.: (use reverse side as needed)

 

 

ETHICS SYLLABUS INSERT

 

Cheating is wrong.  Cheating hurts our community by undermining academic integrity, creating mistrust, and fostering unfair competition.  The university will punish cheaters with failure on an assignment, failure in a course, permanent transcript notation, suspension, and/or expulsion.  Offenses may be reported to medical, law or other professional or graduate schools when a cheater applies.

 

Violations can include cheating on exams, plagiarism, reuse of assignments without permission, improper use of the Internet and electronic devices, unauthorized collaboration, alteration of graded assignments, forgery and falsification, lying, facilitating academic dishonesty, and unfair competition.  Ignorance of these rules is not an excuse.

 

In this course, you are encouraged to discuss the readings and problem sets with other students, but you must always: (1) independently write up the work to be handed in, and (2)indicate on your write-up who you have worked or consulted with. Often students working together make a very unusual error and their write-ups all display the same error, making it obvious they had worked together. This is a problem only if the students did not indicate who they worked with, or if the work was clearly not written up independently. If you have questions about this policy, please ask the professor.

 

On take-home exams, you may not consult with any person except the professors and the TAs. Violation of this rule (often revealed by common, unusual errors) is a serious, prosecutable offense within the university.

 

Written work must be turned in as hard copy; electronic submissions will not be accepted as they have led to many episodes of cheating.