Update README.md

README.md

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 Official dataset release of 4D steerability probe (reading difficulty, formality, textual diversity, text length goal-space). Initial probe contains 2,048 prompts used in our paper (32 different rewrites over 64 texts). 
 
+## Dataset format
+
+Each row contains a source text, along with its mappings in goal-space. We provide normalized and unnormalized values of the following for the source text:
+* Flesch-Kincaid Grade Level (`reading_difficulty`)
+* Heylighen-Dewaele F-Score (`formality`)
+* Measure of Textual Lexical Diversity (`textual_diversity`)
+* Word count (`text_length`)
+
+We also provide goal vectors (`delta_*` or `target_*`) for all goal dimensions.
+
 ## Results
 
 Here, we will retain the most recent versions of SteerBench for top-performing models. Shown here: steering error of recent models (`mean (std. dev.)`).
@@ -101,5 +111,5 @@ Here, we will retain the most recent versions of SteerBench for top-performing m
     <td>0.52 (0.22)</td>
   </tr>
 </table>
-* refusal rate >5%
+* >1% invalid response rate