The phrase "a single ability" is correct and usable in written English.
You can use it when referring to one specific skill or talent that a person possesses.
Example: "In this competition, each participant must demonstrate a single ability that sets them apart from the others."
Alternatives: "one skill" or "a unique talent".
Intelligence, in total, has come to be regarded not as a single ability but as an effective drawing together of many abilities.
We form a principal component to aggregate scores from these categories into a single ability index.
As regards the migrant population, a single ability has been investigated, namely the worker's mastery of the native language or lingua franca of the host country.
The results obtained using the PCA suggests that test-one is not unidimensional and it does not measure a single ability parameter.
The fit of a one-factor model is evidence that a single ability or trait underlies the test and causes the item responses (Borsboom, Mellenbergh, & van Heerden, 2003).
Intelligence as stated by an IQ test is not a measure of a single ability.
Rasch analysis also revealed that the 10 items defined a common, single ability continuum with widespread measurement range and quite regular item distribution, and showed a satisfactory reliability.
The Satorra Bentler test was significant (TRd = 1.97, p < .001, ∆df = 1, N = 284), indicating that assuming two latent abilities better fitted to the observed data than assuming a single latent ability.
Given there are many theories of intelligence, a question that remains is whether intelligence is a single general ability with a single point of origin or a set of many abilities with multiple, complex points of origin.
If there were a program that lacked even a single cognitive ability that is characteristic of people, then by definition it would not qualify as an AGI; using non-cognitive attributes (such as percentage carbon content) to define personhood would be racist, favouring organic brains over silicon brains.
Otherwise stated, learners' four-skill performance is explained by a single, general ability that is hypothesized to be behind these four skills.
