Table 1. Pre- and post-operative test scores.
95% confidence intervals
1: Age adjusted scaled scores (range 1-20, mean = 10, SD = 3)
2: Scaled scores (range 1-10, mean = 6)
WAIS-IV: Wechsler Adult Intelligence Scale IV; BMIPB: BIRT Memory and Information Processing Battery; VOSP: Visual Object and Space Perception Battery; D-KEFS: Delis–Kaplan Executive Function System.
| Instrument | Subtest | Pre-op score | Description | Post-op score | Description |
| WAIS-IV | Verbal Comprehension | 100 | 50th (94-106) | 107 | 68th %ile (CI 101-112) |
| Similarities 1 | 9 | 10 | |||
| Vocabulary 1 | 10 | 12 | |||
| Information 1 | 11 | 12 | |||
| Perceptual Reasoning | 88 | 21st (82-95) | 88 | 21st %ile (CI 82-95) | |
| Block Design1 | 8 | 8 | |||
| Matrix Reasoning 1 | 8 | 8 | |||
| Visual Puzzles1 | 8 | 8 | |||
| Working Memory | 95 | 37th (89-102) | 97 | 42nd %ile (CI 90-104) | |
| Digit Span 1 | 9 | 10 | |||
| Arithmetic 1 | 9 | 9 | |||
| Processing Speed | 79 | 8th (73-89) | 94 | 34th %ile (CI 86-103) | |
| Symbol Search1 | 6 | 10 | |||
| Coding1 | 6 | 8 | |||
| Full Scale IQ (FSIQ) | 89 | 23rd (85-93) | 96 | 39th %ile (92-100) | |
| Forced Choice Recognition Memory Tests | Words | 41/50 | 25th – 50th %ile | 45/50 | 50th – 75th %ile |
| Faces | 39/50 | @25th %ile | 42/50 | @50th %ile | |
| BMIPB | Story Recall | ||||
| Immediate | 16/60 | 25th | 26/60 | 10th %ile | |
| Delayed | 7/60 | 5-10th | 22/60 | 10th %ile | |
| List Learning | 28/75 | Below 2nd | 32/75 | 5-10th %ile | |
| Cambridge Cognition McKenna and Warrington | Graded Naming Test | 24/30 | 75-90th %ile | 28/30 | 99th %ile |
| VOSP | Incomplete Letters | 19/20 | 19/30 | ||
| Silhouettes | 22/30 | 21/30 | |||
| Hayling and Brixton | Hayling2 | 5 | Moderate average | 6 | Average |
| Brixton2 | 2 | Abnormal | 5 | Moderate average | |
| D-KEFS Verbal fluency | Letter fluency | 30 | Low average | 48 | Superior |
| Category fluency | 32 | Average | 41 | High average | |
| D-KEFS Colour-Word Interference Test | Colour Naming1 | 5 | Borderline | 8 | Low average |
| Colour Inhibition1 | 7 | Low average | 10 | Average | |
| Colour Inhibition/Switching1 | 3 | Extremely low | 11 | Average |