diff --git a/lib/models/selection.js b/lib/models/selection.js
index 848b2e360..c2e822aa5 100644
--- a/lib/models/selection.js
+++ b/lib/models/selection.js
@@ -1,5 +1,6 @@
 
 import includes from 'lodash/includes'
+import memoize from '../utils/memoize'
 import { Record } from 'immutable'
 
 /**
@@ -143,8 +144,9 @@ class Selection extends new Record(DEFAULTS) {
    */
 
   hasAnchorAtStartOf(node) {
+    if (this.anchorOffset != 0) return false
     const first = node.kind == 'text' ? node : node.getTexts().first()
-    return this.anchorKey == first.key && this.anchorOffset == 0
+    return this.anchorKey == first.key
   }
 
   /**
@@ -171,9 +173,9 @@ class Selection extends new Record(DEFAULTS) {
 
   hasAnchorBetween(node, start, end) {
     return (
-      this.hasAnchorIn(node) &&
+      this.anchorOffset <= end &&
       start <= this.anchorOffset &&
-      this.anchorOffset <= end
+      this.hasAnchorIn(node)
     )
   }
 
@@ -209,8 +211,9 @@ class Selection extends new Record(DEFAULTS) {
    */
 
   hasFocusAtStartOf(node) {
+    if (this.focusOffset != 0) return false
     const first = node.kind == 'text' ? node : node.getTexts().first()
-    return this.focusKey == first.key && this.focusOffset == 0
+    return this.focusKey == first.key
   }
 
   /**
@@ -225,9 +228,9 @@ class Selection extends new Record(DEFAULTS) {
 
   hasFocusBetween(node, start, end) {
     return (
-      this.hasFocusIn(node) &&
       start <= this.focusOffset &&
-      this.focusOffset <= end
+      this.focusOffset <= end &&
+      this.hasFocusIn(node)
     )
   }
 
@@ -251,9 +254,11 @@ class Selection extends new Record(DEFAULTS) {
    */
 
   isAtStartOf(node) {
-    const { startKey, startOffset } = this
+    const { isExpanded, startKey, startOffset } = this
+    if (isExpanded) return false
+    if (startOffset != 0) return false
     const first = node.kind == 'text' ? node : node.getTexts().first()
-    return this.isCollapsed && startKey == first.key && startOffset == 0
+    return startKey == first.key
   }
 
   /**
@@ -264,9 +269,10 @@ class Selection extends new Record(DEFAULTS) {
    */
 
   isAtEndOf(node) {
-    const { endKey, endOffset } = this
+    const { endKey, endOffset, isExpanded } = this
+    if (isExpanded) return false
     const last = node.kind == 'text' ? node : node.getTexts().last()
-    return this.isCollapsed && endKey == last.key && endOffset == last.length
+    return endKey == last.key && endOffset == last.length
   }
 
   /**
@@ -578,9 +584,22 @@ START_END_METHODS.concat(EDGE_METHODS).forEach((pattern) => {
 })
 
 /**
- * Add edge methods.
+ * Memoize read methods.
  */
 
+memoize(Selection.prototype, [
+  'hasAnchorAtStartOf',
+  'hasAnchorAtEndOf',
+  'hasAnchorBetween',
+  'hasAnchorIn',
+  'hasFocusAtEndOf',
+  'hasFocusAtStartOf',
+  'hasFocusBetween',
+  'hasFocusIn',
+  'isAtStartOf',
+  'isAtEndOf'
+])
+
 /**
  * Export.
  */