Monday, January 24, 2011

December 2010 LSAT Logical Reasoning, PrepTest 62 Analysis

This is the last of the analysis for the December 11, 2010 LSAT, which will become PrepTest 62. I'm most interested in making sure that the Zen of 180 algorithms correctly predicted the point distribution for each task strand so that the data in our free analyzer is accurate.

For today, here's the logical reasoning data broken out into task strand. The first number after the strand or task name is the number of questions allocated on the December 2010 LSAT, and the (+/-x) is the deviation from what we expected based on the average across all modern PrepTests.

We did the same analysis for both the reading comprehension and logic games sections.

For the most part, the predicted values were right on target. Even the ones that weren't were in tasks we have already identified as highly volatile across different PrepTests, like justify in the principles strand. Evaluating evidence use still appears to be on the downswing, with the extra questions divided between assumptions, extrapolation, and principles.

Overall, a very standard set of logical reasoning sections with nothing much to comment on beyond the global trends we already found.

Analyze Logical Structure 10
  1. Main Conclusion 3 (+1)
  2. [Piece] Plays [Role] in Argument 1
  3. Argumentative Strategy Employed 2
  4. Fix by Removing 4
Evaluate Evidence Use 10 (-2)
  1. Strengthen 5
  2. Weaken 3
  3. Fix by Adding 2 (-2)
  4. Helps to Evaluate 0
Identify Assumptions 9 (+1)
  1. Definition 6
  2. Fails to Consider [Possibility] 2
  3. Direct Logic Link 1
  4. Definition Shift 0
Extrapolation Logic 8 (+1)
  1. Most Strongly Supported by [Stimulus] 3
  2. Infer 1
  3. Must also Be True 3 (+2)
  4. Most Logically Completes 1
Principles 8 (+3)
  1. Best Principle for Example 2
  2. Best Example of Principle 2
  3. Justify 4 (+3)
Analyze Details from Different Sources 4
  1. Resolve Discrepancy 4
  2. Point at Issue 0
Identify Similar Logic 3
  1. Most Similar in Flawed Reasoning 2
  2. Most Similar in Reasoning 1