High rising terminal
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The high rising terminal (HRT), also known as uptalk, upspeak, rising inflection or high rising intonation (HRI), is a feature of some accents of English where statements have a rising intonation pattern in the final syllable or syllables of the utterance.
Empirically, Ladd (1996, pg 123) proposes that HRT in American English and Australian English is marked by a high tone (high pitch or high fundamental frequency) beginning on the final accented syllable near the end of the statement (the terminal), and continuing to increase in frequency (up to 40%) to the end of the intonational phrase. New research such as that conducted by Warren (2005) suggests that the actual rise can occur one or more syllables after the last accented syllable of the phrase, and its range is much more variable than previously thought.
The origins of HRT remain uncertain. Geographically, anecdotal evidence places the conception of the American English variety on the West Coast – anywhere from Southern California to the Pacific Northwest.
With respect to the southern hemisphere, Allan (1990) suggested that the feature may have originated in New Zealand.
It is unclear whether the American English varieties and the Oceanic varieties had any influence on each other regarding the spread of HRT.
In the United States, the phenomenon of HRT may be fairly recent but is an increasingly common characteristic of speech especially among younger speakers (see Ching, 1982 for one of the few accounts of HRT in American English). However, serious scientific/linguistic inquiry on this topic has a much more extensive history in linguistic journals from Australia, New Zealand, and Britain where HRT seems to have been noted as early as World War II.
It has been noted in speech heard in areas of Canada, in Cape Town, the Falkland Islands, and in the United States where it is often associated with a particular sociolect that originated among affluent teenage girls in Southern California (see Valleyspeak and Valley girl). Elsewhere in the United States, this intonation is characteristic of the speech heard in those parts of rural North Dakota and Minnesota that through migration have come under the influence of the Norwegian language.
Although it is ridiculed in Britain as "Australian Question Intonation" and blamed on the popularity of Australian soap operas among teenagers, HRT is also a feature of several UK dialects, especially in the mid-Ulster and Belfast variants. 
A 1986 report stated that in Sydney, it is used more than twice as often by young generations as by older ones, and particularly by women (Guy et al., 1986). It has been suggested that the HRT has a facilitative function in conversation (i.e., it encourages the addressee to participate in the conversation), and such functions are more often used by women. It also subtly indicates that the speaker is "not finished yet", thus perhaps discouraging interruption (Allen, 1990; Guy et al., 1986; Warren, 2005). Its use is also suggestive of seeking assurance from the listener that she is aware of what the speaker is referring to.
Although several personalities in the popular media in Australia, Britain, and the United States have negatively portrayed the usage of HRT, claiming that its use is exhibiting a speaker's insecurities about the statement, more recent evidence (McLemore, 1991; Cheng et al., 2005; Warren, 2005) shows that leaders of the peer group are more likely to use HRT in their declaratives than the junior members of the particular peer group. According to University of Pennsylvania phonologist Mark Liberman, George W. Bush began to use HRT extensively in his speeches as his presidency continued.
See also 
- Allan, S. (1990). "The rise of New Zealand intonation". In Bell, A.; Holmes, J. New Zealand ways of Speaking English. Clevendon: Multilingual Matters. pp. 115–128. ISBN 1-85359-083-5.
- Ching, M. (1982). "The question intonation in assertions". American Speech 57: 95–107. ISSN 0003-1283.
- Cheng, W.; Warren, M. (2005). "//CAN i help you //: The use of rise and rise-fall tones in the Hong Kong Corpus of Spoken English". International Journal of Corpus Linguistics 10 (1): 85–107. ISSN 1384-6655.
- Guy, G.; Horvath, B.; Vonwiller, J.; Daisley, E.; Rogers, I. (1986). "An intonation change in progress in Australian English". Language in Society 15: 23–52. ISSN 0047-4045.
- Ladd, David R. (1996). Intonational phonology. Cambridge: Cambridge University Press. ISBN 0-521-47498-1.
- McLemore, C.A. (1991). "The Pragmatic Interpretation of English Intonation: Sorority Speech". Dissertation Abstracts International A: The Humanities and Social Sciences 52 (4): 1311–A.
- Warren, P. (2005). "Patterns of late rising in New Zealand English: Intonational variation or intonation change?". Language Variation and Change 17: 209–230. ISSN 0954-3945.