Context: The Processing Speed for situations requiring immediate attention is sluggish
I'd like to know if this sounds acceptable in a neuropsychological report, or if there's a more suitable word.
zac, you might consider the word depressed: reduce the level or strength of activity in (something, esp. an economic or biological system).
On the first 2 days after caffeine discontinuance, depression of locomotor ....
or, possibly better, impaired, lowered or even lag
The short and simple word here would be slow.
I'd find something more neutral, such as prolonged, or protracted to use in a neuropsychological report. "Markedly prolonged" is often used in medical writing and may be what you are looking for.
Here, the word sluggish suggests 'slow,' but at the same time, there's no referent. Slow compared to what?
I think a better option would be to use a word like diminished, with specific reference to some other process, or processing state.
Also, why capitalize "Processing Speed"?