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THE DISTRIBUTION OF M |
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NUMBER |
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NUMBER |
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0F LAW
SCHOOLS |
0F LAW |
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VALUE OF M |
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VALUE OF M |
SCHOOLS |
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4.000-4.999 |
2 |
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12.000-12.499 |
10 |
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5.000-5.999 |
3 |
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12.500-12.999 |
10 |
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6.000-6.999 |
5 |
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13.000-13.999 |
9 |
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7.000-7.999 |
7 |
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14.000-14.999 |
7 |
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8.000-8.999 |
12 |
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15.000-15.999 |
8 |
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9.000-9.499 |
9 |
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16.000-16.999 |
1 |
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9.500-9.999 |
12 |
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17.000-17.999 |
0 |
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10.000-10.499 |
20 |
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18.000-18.999 |
2 |
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10.500-10.999 |
16 |
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19.000-20.999 |
2 |
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11.000-11.499 |
12 |
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21.000-23.999 |
2 |
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11.500-11.999 |
15 |
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24.000-26'999 |
2 |
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11.500-11.999 |
15 |
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24.000-26'999 |
2 | |
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THE ADMISSION INDEX
OF THE TOP 18 |
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| 2011 |
LAW SCHOOL |
M=B/A |
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2011 |
LAW SCHOOL |
M=B/A |
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RANK |
RANK |
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1 |
Yale U |
N/A |
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10 |
U Virginia |
N/A |
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2 |
Harvard |
N/A |
|
11.5 |
Duke U |
12.762 |
|
3 |
Stanford |
22.333 |
|
11.5 |
Northwestern U |
15.018 |
|
4 |
Columbia |
12.422 |
|
13 |
Cornell U |
11.074 |
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5 |
U Chicago |
N/A |
|
14 |
Georgetown U |
N/A |
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6 |
New Yok U |
N/A |
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15.5 |
UCLA |
11.000 |
|
7.5 |
UC Berkeley |
26.966 |
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15.5 |
U Texas |
N/A |
|
7.5 |
U Pennsylvania |
N/A |
|
17 |
Vanderbilt U |
15.018 |
|
9 |
U Michigan |
N/A |
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18 |
U S California |
13.667 | |
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PROPERTIES OF M |
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Both
INDEX = A* LSATScore + B* GPA + C
and
INDEXM = LSATScore + M*GPA,
where B/A = M, will give the same ordering for a group of law school applicants at a given law school. Where INDEXM excells is in preserving the ordering given by INDEX and by satisfying the following five useful properties.
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- The smaller the value of M, the greater the weight given to the LSAT in the admission process.
- The larger the value of M, the greater the weight given to the GPA in the admission process.
- Given two applicants, where one has a higher LSAT score and the other has a higher GPA, there exists a unique positive number M which will assign the two applicants the same index number. Calculating this positive number M involves three steps: taking the diference of the LSAT scores of the two applicant, taking the dfference of the GPAs of the two applicant, and then dividing the difference of the LSAT scores by the difference of the two GPAs, where the two difference are positive.
- Increasing the LSAT score by M and decreasing the GPA by 1.00 (e.g. from 3.85 to 2.85) will not change the index number.
- Decreasing the LSAT score by M and increasing the GPA by 1.00 will not change the index number.
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ADMISSION INDEX AS GIVEN BY LSAC |
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Attached is the latest (Monday, May 17, 2010, 10:52 AM) Admissions Index Information Sheet.
The admission index is a single number obtained by applying a formula drawn from two predictors: undergraduate grade-point aver age (UGPA) and LSAT score. Many law schools use an index formula to combine applicants' LSAT and GPA information in ways best suited to their particular admission procedures. For example, the index is often used as part of a preliminary evaluation of applicant files. An index is provided on the Credential Assembly Service (LSDAS) Law School Report in the summary section for Credential Assembly Service (LSDAS)- requiring law schools that choose to have an index computed. Each law school may specify calculations to be made in determining the index numbers that LSAC reports. If an applicant has more than one LSAT score, an index number is calculated for each score and for the average of the scores. Each school choosing to have an index computed decides whether to use the cumulative UGPA across all undergraduate schools attended or the GPA earned only at the undergraduate school granting the first four-year degree. The index is produced by (1) multiplying the LSAT score by some constant (A), (2) multiplying the UGPA by some other constant (B), and (3) adding the sum of these two quantities to a third constant (C). In symbols:
Index = [(A) x (LSAT)] + [(B) x (GPA)] + C
The values of the constants A, B, and C are supplied by the law schools them selves. The values of the constants chosen by a law school may be changed from time to time at the request of the law school. For law schools that participate in validity studies, the results are available for use in the selection of the constants for the admission index. Not all law schools use index formulas and those that do use index numbers do not necessarily use them in the same way. An index calculated by LSAC is not the exclusive means by which a law school may combine data reflected on the law school report and/or other data. The absence of an index on a report for a school does not mean that such calculations are or are not made by the school receiving the report. Some law schools may calculate their own admission indexes independently of LSAC.
SITE'S COMMENT. Deleting the unnecessary parentheses and square brachets from
Index = [(A) x (LSAT)] + [(B) x (GPA)] + C
gives us
INDEX = A x LSATScore + B x GPA +C. |
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Revised: September 19, 2010
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