Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Browse code

Notes for 9/9

  • Loading branch information...
commit 8231a9e5dd6689aebe95dd22c8ae713d5a23a0f5 1 parent 542de01
Mike Skalnik authored September 09, 2010

Showing 1 changed file with 56 additions and 0 deletions. Show diff stats Hide diff stats

  1. 56  Notes/9-9.txt
56  Notes/9-9.txt
... ...
@@ -0,0 +1,56 @@
  1
+Important Aspects of Validity
  2
+* Validity is inferred, not measured
  3
+  With reliability, you measure. However, with validity you don't
  4
+* Validity depends on many different types of evidence
  5
+  * Content
  6
+  * Criteria
  7
+  * Construct
  8
+* Validity is expressed by degree
  9
+  Nothing is complete invalid or valid
  10
+* Validity is specific to a particular use
  11
+  Only really measures a single construct
  12
+* Validity refers to inferences drawn, not the measure itself
  13
+* Validity is a unitary construct
  14
+  For a long time validity was split into 3 (content, criteria, construct). Now it's seen as a single thing with 3 parts
  15
+ Types of Categories of Validity
  16
+ * Content-related Validity
  17
+  * Adequate Measurement
  18
+    Has to get at what we want it to get at
  19
+    * Relevant
  20
+    * Representative
  21
+* Face Validity
  22
+  * Assesses whether the measurement items appear to measure what they are suppposed to measure.
  23
+    e.g., Really badly worded questions.
  24
+  * Do the assessment items look valid?
  25
+* Criterion-Related Validity
  26
+  DV-related validity. See if our measure of whatever construct relates to other measures of other constructs related to ours
  27
+  e.g., SAT test and GPA. Does the SAT predict GPA of freshman year. If they're related, then we have some Criterion-related validity
  28
+  * Types of Testing
  29
+    * Concurrent
  30
+      Take both tests, and then see how they both correlate with GPA
  31
+    * Predictive
  32
+      Have a theory that Fear of Failure/Achievement Motivation leads to Executive Success. Measurement would be average time between promotions.  So with a survey used to determine FoF/Ac motivation you predict average time between promotions
  33
+  * Types of Criterion
  34
+* Construct Validity
  35
+  The degree to which your manifest variable measures your hypothetical construct
  36
+  How to get to it
  37
+    * Formulating hypotheses about the links between the operational measure and the hypothetical construct
  38
+    * Conduct a study to determine the empirical relationship between your measure and other measures of other related constructs
  39
+    * Interpret the results in terms of construct-related validity
  40
+    * Kinds of Construct Validity
  41
+      * Convergent Validity
  42
+      * Discriminant Validity
  43
+        * Method Variables
  44
+        * Substantive Variables
  45
+    * Manifest Variable
  46
+* Differential Validity
  47
+  * When a measure is more valid for one group than the other.
  48
+* The relationship between Reliability and Validity
  49
+  * For a measure to be valid, it has to be reliable
  50
+  * However, reliability is not sufficient to claim validity.
  51
+  A scale. If the scale is always 2 lb heavier, then it's reliable, however it's not valid.
  52
+
  53
+Threats to Internal Validity
  54
+* The extent to which one can be confident that the results are reported support the casual hypothesis being tested
  55
+* It is the basic minimum without which any experiment is uninterpretable
  56
+* Are variables that appear to be causally related, REALLY causally related, or is this relationship spurious

0 notes on commit 8231a9e

Please sign in to comment.
Something went wrong with that request. Please try again.