diff --git a/src/utils/compute-dataset-variable.js b/src/utils/compute-dataset-variable.js
index fa345792..5d127247 100644
--- a/src/utils/compute-dataset-variable.js
+++ b/src/utils/compute-dataset-variable.js
@@ -36,6 +36,41 @@ export default (dataset, varName) => {
       }
     case "number_of_classifications":
       return dataset.interface.labels.length
+    case "average_number_of_interactions_per_image":
+      // find completed samples
+      const completedSamples = dataset.samples.filter((s) => s.annotation)
+      let totalInteractions = 0
+      let totalSamplesConsidered = 0
+      for (const { annotation } of completedSamples) {
+        if (totalSamplesConsidered > 10) break
+        if (typeof annotation === "object" && annotation.length) {
+          totalSamplesConsidered += 1
+          for (const { points } of annotation) {
+            if (points) {
+              totalInteractions += points.length
+            } else {
+              totalInteractions += 1
+            }
+          }
+        }
+      }
+      if (totalSamplesConsidered < 1)
+        throw new Error(
+          "Not enough completed samples to compute average_number_of_interactions_per_image"
+        )
+      return totalInteractions / totalSamplesConsidered
+    case "number_of_exclusive_classifications":
+      return dataset.interface.multiple ? 0 : dataset.interface.labels.length
+    case "number_of_nonexclusive_classifications":
+      return dataset.interface.multiple ? dataset.interface.labels.length : 0
+    case "average_text_length":
+      return (
+        dataset.samples
+          .map((s) => s.document.length)
+          .reduce((acc, l) => acc + l, 0) / dataset.samples.length
+      )
+    case "number_of_labels":
+      return dataset.interface.labels.length
     default:
       throw new Error(`Don't know how to compute "${varName}"`)
   }