This "Standard British" treatment of intonation in its present-day form is explained in detail by Wells and in a simplified version by Roach. Halliday saw the functions of intonation as depending on choices in three main variables: Tonality (division of speech into intonation units), Tonicity (the placement of the tonic syllable or nucleus) and Tone (choice of nuclear tone); these terms (sometimes referred to as "the three T's") have been used more recently. - This "Standard British" treatment of intonation in its present-day form is explained in detail by Wells and in a simplified version by Roach. Halliday saw the functions of intonation as depending on choices in three main variables: Tonality (division of speech into intonation units), Tonicity (the placement of the tonic syllable or nucleus) and Tone (choice of nuclear tone); these terms (sometimes referred to as "the three T's") have been used more recently.
- Research by Crystal emphasized the importance of making generalizations about intonation based on authentic, unscripted speech, and the roles played by prosodic features such as tempo, pitch range, loudness and rhythmicality in communicative functions usually attributed to intonation.
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