CatAlgorithmPromis Diff

CatAlgorithmPromis.diff

diff --git a/src/main/java/edu/stanford/survey/server/CatAlgorithmPromis.java b/src/main/java/edu/stanford/survey/server/CatAlgorithmPromis.java
index cbf03a8e..a8cca090 100644
--- a/src/main/java/edu/stanford/survey/server/CatAlgorithmPromis.java
+++ b/src/main/java/edu/stanford/survey/server/CatAlgorithmPromis.java
@@ -70,7 +70,8 @@ public CatAlgorithm initialize(ItemBank itemBank) {
       int nCategory =  0;
       for (Response r : item.responses()) {
         if (r.difficulty() < 1 || r.difficulty() > item.betas().length + 1) {
-          throw new IllegalArgumentException("Item " + item.code() + " has a response with a difficulty out of range");
+          log.debug("Item " + item.code() + " has a response with a difficulty out of range");
+          continue;
         }
         nCategory = Math.max(nCategory, r.difficulty());
       }
@@ -186,6 +187,11 @@ public Score score(List<Response> currentAssessmentResponses) {
     double[] loglik = new double[thetas.length];
     if (currentAssessmentResponses != null) {
       for (Response response : currentAssessmentResponses) {
+        if (response.difficulty() < 1 || response.difficulty() > response.item().betas().length + 1) {
+          // FIXME: This doesn't work with measures with intentional values of 0
+          log.debug("Item " + response.item().code() + " has a response with a difficulty out of range");
+          continue;
+        }
         for (int i = 0; i < loglik.length; i++) {
           // Note the shift to one -1 difficulty: IMPORTANT!!!!
           loglik[i] += itemCodeToLpMatrix.get(response.item().code())[i][response.difficulty() - 1];