What is a major criticism of the central executive concept?

• A. It is vaguely defined and difficult to measure directly; may reflect a set of processes rather than a single module.
• B. It is well defined and easily measured.
• C. It has no relation to executive control.
• D. It is identical to short-term memory.

Answer: (C)

Think about what the central executive is supposed to do: it’s the control system that directs attention, switches between tasks, and coordinates the other parts of working memory. The main criticism is that this central executive isn’t a neatly defined, single module. Instead, it’s described as a set of high-level control processes—like updating, shifting attention, and inhibiting competing responses—that are hard to isolate and measure as one thing. Because of that vagueness, researchers struggle to pin down its exact boundaries or quantify its capacity with a direct test. Tasks that seem to tap the central executive often tap multiple processes at once, so the central executive is criticized for being ill-defined and difficult to measure directly, potentially reflecting a collection of processes rather than a single unit. It isn’t unrelated to executive control—quite the opposite—and it isn’t simply another form of short-term memory, since it sits above STM as the control mechanism.