In language, modality is the subject concerning so-called "modal verbs" like can, must, and should, that are customarily used to modify the meaning of other verbs (which in turn tend to take the infinitive). Modal verbs express possibility (and impossibility, necessity, contingency, etc.), permissibility (and obligation, proscription, etc.), probability (and improbability, etc.). See grammatical mood. Linguistic modality can also refer to the type of communication, whether vocal, signed, or written.
In philosophy, modal logic is a form of logic which distinguishes between (logically) "necessary truths" and "contingent truths". Related topics are possibility, impossibility, actuality, and related predicates.
In computer science and particularly computer vision, modality refers to the type of input. That is, black-and-white, color and infrared are three different modalities for the acquisition of an image.
In human-computer interaction, a modality is a path of communication between the human and the computer, such as vision or touch.
In advance fee fraud (Nigerian 419 Scams), the term modality is used to describe the method of funds transfer. Often used in as a key word in scam baiting
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Modality components perform interface tasks pertinent to their particular interface modality (e.g voice, pen, visual display).
This subsection describes the interfaces that a modality component may choose to enable to allow the host environment to directly manipulate the component.
These are the interfaces necessary for events to be passed from the modality component to the host environment.
In discussing epistematically modal utterances, Lyons distinguishes between "objective epistemic modality" and "subjective epistemic modality." Objective epistemic modality states an "unqualified assertion of the possibility of a proposition," while subjective epistemic modality qualifies "the assertion of the factuality of the proposition" (Lyons 1977:750).
Modality and/or evidentiality marking in the speech of both interlocutors is significant in revealing their respective propositional attitudes and different cognitive processes in math problem solving.
By focusing on expressions of modality, this paper has demonstrated that the linguistic behavior of an individual is significantly related to his or her cognitive processes.
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