49 WAIS-IV (PSI) PROCESSING SPEED INDEX
Symbol Search: Information processing speed, planning, encoding information, learning, visuomotor coordination, and visual search speed are measured on this test.
High scores: can rapidly learn and integrate information, good visuomotor coordination, short-term visual memory, attention, concentration, and general learning abilities are measured.
Low scores: difficulties with visual-perceptual processing, poor motivation, anxiety, short term visual memory problems, perfectionistic, and obsessive problem-solving.
Cancellation: Perceptual recognition, speed and accuracy, attention, concentration, visuomotor coordination, perceptual scanning ability, and perceptual discrimination abilities.
High scores: good processing speed, attention, concentration, scanning abilities, and perceptual recognition.
Low scores: visual neglect, difficulties inhibiting responses, and motor perseveration may be present. Poor distractibility noted in ADHD and TBI may been noted on this subtest. Slow processing speeds, poor perceptual recognition, poor scanning abilities, and poor motivation.