diff --git a/src/main/scala/org/xcit/nback/generators/SkewedSequenceGenerator.scala b/src/main/scala/org/xcit/nback/generators/SkewedSequenceGenerator.scala
index a54b5a4..3549506 100644
--- a/src/main/scala/org/xcit/nback/generators/SkewedSequenceGenerator.scala
+++ b/src/main/scala/org/xcit/nback/generators/SkewedSequenceGenerator.scala
@@ -7,12 +7,12 @@
   * Reference: Ralph2014 - Appendix A
   *
   * @param alphabet Alphabet used to generate the sequence, excluding the target item
-  * @param target Target character.
+  * @param target Target item. It must not be included in [[alphabet]].
   * @param N The set size of stimuli to remember (n in n-back). Default is 3.
-  * @param T Probability of matching target in a trial (from 0 to 100).
-  * @param D Probability of showing a non-matching distractor in a trial (from 0 to 100).
-  * @param L1 Probability of showing a matching item with n-1 item (pre-trial match), in a trial (from 0 to 100).
-  * @param L2 Probability of showing a matching item with n+1 item (post-trial match) in a trial (from 0 to 100).
+  * @param T Number of target trials
+  * @param D Number of non-matching distractor trials.
+  * @param L1 Number of pre-lure trials; new trial matches with n-1 trial (pre-trial match).
+  * @param L2 Number of post-lure trials; trial matches with n+1 trial (post-trial match).
   */
 class SkewedSequenceGenerator(
   alphabet: String = "ABCDEFGH", // it's also called pool in ralph2014