15.2 ASL Prosody, Phrasing & Sentence Boundaries

The NIC Role Delineation Study requires knowledge of "sentence boundaries" and skill in "using discourse boundaries (phrasing)," "recognizing sentence boundaries," and "inflection/intonation" — in ASL as well as in English. CASLI's recommended reading list includes Brenda Nicodemus's Prosodic Markers and Utterance Boundaries in American Sign Language Interpretation. Prosody is the layer that separates an interpretation a Deaf consumer can follow from a stream of technically correct signs.

1. What prosody does

In spoken language, prosody — intonation, stress, rhythm, pausing, loudness — tells the listener where units begin and end, what is new versus given, what is emphasized, what is a question, and how the speaker feels. Strip prosody from speech and comprehension collapses even though every word is present.

ASL has the same layer, realized visually. Without it, a signed rendering becomes an undifferentiated string: the consumer cannot tell where one idea stops and the next starts, cannot locate emphasis, and must do the parsing work themselves while new material keeps arriving.

2. The markers

Note that most prosodic marking in ASL is non-manual and scopes over a span rather than attaching to a single sign — which is why prosody and grammatical non-manual markers are intertwined.

3. Prosody is not optional

Three practical consequences for interpreters:

1. Boundary marking is the minimum. A rendering with no holds, no pauses, and no gaze shifts forces the consumer to segment the stream themselves. This is one of the most common features of interpretations Deaf consumers describe as "hard to watch" even when the vocabulary is correct.
2. Emphasis carries meaning. English marks emphasis with stress and pitch: I didn't say she stole it has seven different meanings depending on which word is stressed. ASL marks it with size, duration, repetition, non-manual intensity, and placement. An interpreter who produces the same flat amplitude throughout has deleted a meaning-bearing channel.
3. Affect is content. A physician delivering bad news gently and a physician delivering it brusquely are giving different messages. Flattening affect — very common among interpreters who equate neutrality with blankness — strips the consumer of information every hearing participant received.

4. Prosody and lag time

There is a direct relationship between lag and prosody. An interpreter working with a very short lag must commit to a rendering before the source unit is complete, so they cannot know where the unit boundary is or what will turn out to be the emphasized element. The result is characteristically flat: no holds in the right places, emphasis in the wrong places, and boundaries that do not correspond to the source's structure.

Lengthening lag — or shifting toward consecutive mode — is therefore a prosody control as much as an accuracy control.

5. Receiving prosody

The same markers run the other way. When interpreting ASL into English, the signer's prosody tells you:

• Where the units end, so your English sentences match their propositions.
• What is emphasized, so your English stress and word order can place it correctly.
• What is a rhetorical question versus a genuine one — a distinction ASL marks non-manually and English marks with intonation.
• What is background versus foreground in a narrative.
• Affect and stance, which your English voicing must carry through pitch, pace, volume, and word choice.

An interpreter who voices a signer's emphatic, indignant account in a flat, measured English register has produced an inaccurate interpretation, even if every proposition is present. This is a frequent and consequential failure in legal and employment settings, where a Deaf party's credibility and affect are being assessed by people who only ever hear the interpreter's voice.

6. Listing, comparison and spatial prosody

ASL uses the non-dominant hand and space prosodically in ways that have no direct English equivalent:

• List buoys — holding a 1, 2, 3, 4, 5 handshape on the non-dominant hand while the dominant hand elaborates each item — mark structure and let the consumer track position in a list. English "first… second… third" is a much weaker cue.
• Contrastive structure — establishing two loci and shifting body weight between them — marks comparison without lexical connectives.
• Topic-establishment with a hold marks the frame before the comment.

Using these is not stylistic flourish; it is how ASL delivers discourse structure that English delivers with connectives and intonation. An interpreter who renders a numbered list as unmarked sequential sentences has lost the structure, not just the style.