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The modality effect is a term used in experimental psychology, most often in the fields dealing with memory and learning, to refer to how learner performance depends on the presentation mode of studied items.
The most basic understanding of language comes via semiotics – the association between words and symbols. A multimodal text changes its semiotic effect by placing words with preconceived meanings in a new context, whether that context is audio, visual, or digital. This in turn creates a new, foundationally different meaning for an audience.
In classic formal approaches to linguistic modality, an utterance expressing modality is one that can always roughly be paraphrased to fit the following template: (3) According to [a set of rules, wishes, beliefs,...] it is [necessary, possible] that [the main proposition] is the case.
According to the modality effect, echoic memory has an advantage over iconic memory. [12] Research has shown that the speech is more apt to objective interpretation than inputs to the visual system. This indicates that auditory information is first processed for its physical features, and then combined with visual information features.
Some combinations of signs can be multi-modal, i.e. different types of signs grouped together for effect. But the distinction between a medium and a modality should be clarified: text is a medium for presenting the modality of natural language; image is both a medium and a modality; music is a modality for the auditory media.
In the context of human–computer interaction, a modality is the classification of a single independent channel of input/output between a computer and a human. Such channels may differ based on sensory nature (e.g., visual vs. auditory), [1] or other significant differences in processing (e.g., text vs. image). [2]
Modality (therapy), a method of therapeutic approach; Modality (diagnosis), a method of diagnosis; Modality (medical imaging), acquiring structural or functional images of the body; Stimulus modality, a type of physical phenomenon or stimulus that one can sense, such as temperature and sound; Modality Partnership, a British primary care provider
In his book The Humane Interface, Jef Raskin defines modality as follows: "An human-machine interface is modal with respect to a given gesture when (1) the current state of the interface is not the user's locus of attention and (2) the interface will execute one among several different responses to the gesture, depending on the system's current state."