Wechsler Adult Intelligence Scale - Fourth UK Edition (WAIS-IV UK)

Clinical utility

• New special group studies. Click for a listing of all special group studies (10.3KB, PDF)
• Co-normed with the Wechsler Memory Scale®-IV UK.
• General Ability Index (GAI) included

Increased developmental appropriateness

• More efficient administration time
• Added teaching items to ensure understanding of task
• Reduced vocabulary-level for verbatim instructions
• Reduced emphasis on motor demands and timed performance
• Enlarged visual stimuli

Enhanced user friendliness

• Reduced testing time by an average of 15%
• Revised instructions for clarity and consistency
• Redesigned record form
• Increased portability
• Expanded sample responses
• Simplified technical manual organization
• Included new clinically sensitive supplemental subtests

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Improved Psychometric Properties

• Updated norms
• Improved floors and ceilings
• Expanded FSIQ range
• Improved subtest and composite reliability
• Reduced item bias

Updated structural foundations

• Transitioned from dual IQ to Index Score structure
  • Consistency with WPPSI-III and WISC-IV
  • Fewer Subtests yield FSIQ and 4 Index Scores (VCI, PRI, WMI, & PSI)
• New measure of fluid intelligence
  • Developed new subtest to measure fluid reasoning (Visual Puzzles and Figure Weights)
• Enhanced measures of working memory
  • Revise arithmetic to emphasize WM
  • Revise digit span to emphasize WM (added Digit Sequencing)
  • Retain auditory WM measures on WAIS, visuo-spatial WM Measures on WMS
• Improved measure of processing speed
  • Reduce fine motor demands
  • Included an additional supplemental subtest (Cancellation)

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