The Graduate School of Arts and Sciences requires that all doctoral
dissertations undergo a formal examination in which the student has the
opportunity to discuss and defend the dissertation with respect to its sources,
findings, interpretations, and conclusions before a committee of faculty knowledgeable
in the student's field of research. All faculty members of the defense
committee are expected to be present at the defense.
Only the candidate and the approved members of the
dissertation defense committee may be present during the defense. Columbia
University policy never allows spectators or other individuals to attend a
defense. There are no exceptions to this rule.
The defense must be conducted in English.
The examination normally lasts two hours. The candidate is
generally asked to begin by summarizing the pertinent background and findings.
Such summaries should be limited to five minutes. The Chair of the Committee is
responsible for allotting time, normally allowing each faculty member 20
minutes in which to examine the candidate.
Typically examiners provide lists of points they wish to
discuss. These points are either substantial or editorial. Unless it is
necessary to show that a very poorly written dissertation must be entirely
rewritten, examiners should not take up these editorial comments one by one.
Examiners should give their sheets of notes on these matters to the candidate,
leaving time to examine matters of substance.
When all examiners have finished their questioning, the
Chair asks the candidate to step outside and wait for a signal to return. The
committee rises on the candidate's leaving and entering.
During the discussion period, the Committee makes its
decision on the defense. The three possible decisions are Pass, Incomplete or
Fail.
The Vote: Pass, Incomplete or Fail
Pass:
The dissertation is deemed acceptable subject to minor revisions.
The dissertation is revised by the candidate in light of the
comments made by the committee, and the revisions are supervised by the
student's sponsor. Usually it is not necessary to seek approval from the
defense committee for minor revisions, provided the approval card is signed by
the sponsor and department/program chair. The defense committee, however,
reserves the right to review those revisions. Upon completion of the required
revisions, the candidate is recommended for the degree.
The candidate must complete all revisions and deposit the
dissertation no later than six months from the date of the dissertation
defense. A unanimous vote or a vote with only one dissent in a lower column
constitutes a pass. In the case of three votes for pass and two for incomplete
or fail, the voting sheet and dissertation must be submitted to the Dean for
review and the candidate should be informed that the committee's vote was not
conclusive and he/she should await further communication from the Dean.
Incomplete:
The dissertation is deemed acceptable subject to major revisions. Upon
completion and acceptance of the required revisions, the defense is considered
to be successful and the vote is changed to Pass.
Where a dissertation is considered incomplete (i.e.
acceptable subject to major revisions,) the Chair of the Defense Committee is
required to form a revisions subcommittee made up of one to three members of
the original committee, whose names must be entered as such on the Voting
Sheet. Usually the sponsor of the dissertation is chair of the subcommittee;
the other members should be those committee members who have made the most
extensive objections to the text as it stands. When the student has finished
the major revisions, he or she must submit the revised dissertation to each of
the members of the revisions subcommittee. Specified revisions must be made and
the approved copies submitted to the revisions subcommittee no earlier than
three months and no later than one year after the defense unless otherwise
directed by the committee. If the revised dissertation is accepted by the
subcommittee, each member of the revisions subcommittee must confirm acceptance
in writing to the Dissertation Office. Once all these letters arrive, the
Dissertation Officer changes the vote from “Incomplete” to “Pass,” and the candidate
may deposit the dissertation.
Fail:
The dissertation is deemed unacceptable and the candidate is not recommended
for the degree. No candidate may have a second defense unless the Dean
considers, upon the evidence provided, that the first one involved procedural
irregularities.
Note that, subject to the rules of the Graduate School of
Arts and Sciences, the candidate, within ten years of the award of the M.Phil.
degree, may submit to the Dean, a body of published, independent and original
scholarly material as fulfilling the requirement for the Ph.D. degree extra
muros. If that material is deemed acceptable for the defense, the
candidate will be permitted to sit for another defense with a newly formed and
approved defense committee consisting of five members of the faculty.
Back to Top 
Distinction
In assessing the dissertation under examination the following guidelines should
be followed concerning the question of its distinction:
After the committee decides to the acceptability of the
dissertation, they address the question of awarding the degree "with
distinction." A vote on this question will be taken by secret ballot. For
a degree to be awarded "with distinction" the ballots must be
unanimous.
If the examining committee votes to award distinction, a
member of the examining committee other than the sponsor must prepare a letter
to the Dean outlining the qualities of the dissertation that merit the award of
distinction, including the nature of its contribution to scholarship in its
field and its broader significance as a contribution to learning. The Dean's
Office, which acts on behalf of the Executive Committee of the Graduate School,
will maintain a file of such letters of support for review.
Although there can be no rigorous quota on the number of
dissertations awarded distinction, the standard of merit should be such that no
more than ten percent of dissertations receive distinction. The dissertation
may be recommended for distinction only by the original examining committee.
A student whose degree is awarded "with
distinction" shall, upon final deposit of his or her dissertation, receive
a letter of commendation from the Dean; the student's permanent transcript and
the Doctoral Convocation program shall be annotated accordingly.
Back to Top 
Emergency Absentee
A committee is permitted to convene in the absence of one member only in cases
of extreme circumstance or emergency. If a member of a committee will not be
able to attend the defense, the Dissertation Officer must be notified prior to
the defense to obtain approval of the Dean. If the Dean grants permission for
the defense to take place, the absent member is required to write a detailed
letter containing all comments and questions that would normally be raised at
the defense and his or her provisional vote. The Chair of the committee will
present these questions to the candidate, rule on the candidate’s responses,
and signs the voting sheet in the absent committee member’s name.
If the emergency that prevents the member from being present
cannot be anticipated, the absent member is requested to comply with the
regulations above as soon as possible AFTER the defense. The vote will not be
considered final until the required letter has been submitted to the Dean’s
Office by the absent member of the committee.
Questions, comments and a vote must be submitted in writing
even if the absent committee member participates via conference-call. The
dissertation office cannot make arrangements for conference call set-up,
projectors or audio equipment.
|