The final subtest was Block Design . She took out the red-and-white cubes. “Make this,” she said, sliding a picture of a diagonal diamond pattern toward him.
He let go. The blocks scattered. And then he did something she had never seen in twenty years of administering the WAIS-IV. He didn’t ask for his score. He didn’t rationalize. He simply laid his forehead on the cool metal table and whispered, “I built a hospital last year. Now I can’t build a four-block square.”
Elena clicked the tablet. The first puzzle appeared: a complex, irregular polygon. Mateo stared. His fingers, which had once sketched award-winning cantilevered bridges, hovered over the numbered options. One, four, and six. He pointed. It was wrong. The correct combination was two, five, and seven.
Elena closed her binder. The “pruebas”—the tests—had done their job. They had measured his processing speed (low), his working memory (borderline), his perceptual reasoning (scattered, with a significant drop from estimated premorbid function). The numbers would tell a story of cognitive decline. But the real prueba, the real test, was sitting right in front of her. wais-iv pruebas
They moved on. Digit Span . She read a string of numbers: 3-9-1-8. He repeated them forward, flawless. Backward? He stumbled at five digits. Arithmetic . “If a man buys twenty oranges for two hundred pesos and sells them for fifteen pesos each, what is his profit per orange?” Mateo’s brow furrowed. He started doing complex multiplication in the air with his finger. The answer was simple: five pesos. He said eight.
She slid a piece of paper across the table. It wasn’t a diagnosis. It was a referral to a neurologist who specialized in early-onset autoimmune encephalitis.
Mateo’s hands trembled. He picked up a cube, turned it, put it down. He assembled two cubes correctly, then froze. Instead of rotating the pattern in his mind, he tried to force the physical blocks to match a memory that was no longer there. He pressed a white triangle against a red half-square. It didn’t fit. He pushed harder. The final subtest was Block Design
“You will see a puzzle on the screen,” she said, her voice a practiced, neutral calm. “Then you will select the three options that, when combined, make that shape.”
“Because the line… it rotates, but also the shading… no, that’s not right.” He looked at her, desperate. “I used to be good at this.”
He looked up. For the first time that afternoon, he didn’t see a test. He saw a key. He let go
“Mateo,” Elena said softly. “Time.”
By the time they reached Matrix Reasoning , Elena had begun to suspect the problem wasn’t in his mind, but in the interface between his mind and the world. He could see the abstract patterns—the spiraling triangles, the alternating colors—but when he tried to explain why the missing piece belonged there, his words came out as tangled nets.
Dr. Elena Vargas adjusted the circular silver disc on the table between them. It was a standard response board for the Visual Puzzles subtest, but to her new client, it might as well have been an alien artifact.
Her client, a man named Mateo who listed his occupation as “architect,” nodded. He had requested the WAIS-IV evaluation himself. “I feel foggy,” he’d said on the phone. “Like the blueprints in my head have turned to scribbles.” He was only thirty-four.