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  • 1
    In: The Oncologist, Oxford University Press (OUP), Vol. 27, No. 5 ( 2022-05-06), p. e393-e401
    Abstract: We explored health professionals’ views on the utility of circulating tumor DNA (ctDNA) testing in hereditary cancer syndrome (HCS) management. Materials and Methods A qualitative interpretive description study was conducted, using semi-structured interviews with professionals across Canada. Thematic analysis employing constant comparison was used for analysis. 2 investigators coded each transcript. Differences were reconciled through discussion and the codebook was modified as new codes and themes emerged from the data. Results Thirty-five professionals participated and included genetic counselors (n = 12), geneticists (n = 9), oncologists (n = 4), family doctors (n = 3), lab directors and scientists (n = 3), a health-system decision maker, a surgeon, a pathologist, and a nurse. Professionals described ctDNA as “transformative” and a “game-changer”. However, they were divided on its use in HCS management, with some being optimistic (optimists) while others were hesitant (pessimists). Differences were driven by views on 3 factors: (1) clinical utility, (2) ctDNA’s role in cancer screening, and (3) ctDNA’s invasiveness. Optimists anticipated ctDNA testing would have clinical utility for HCS patients, its role would be akin to a diagnostic test and would be less invasive than standard screening (eg imaging). Pessimistic participants felt ctDNA testing would add limited utility; it would effectively be another screening test in the pathway, likely triggering additional investigations downstream, thereby increasing invasiveness. Conclusions Providers anticipated ctDNA testing will transform early cancer detection for HCS families. However, the contrasting positions on ctDNA’s role in the care pathway raise potential practice variations, highlighting a need to develop evidence to support clinical implementation and guidelines to standardize adoption.
    Type of Medium: Online Resource
    ISSN: 1083-7159 , 1549-490X
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2023829-0
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  • 2
    In: The American Journal of Human Genetics, Elsevier BV, Vol. 110, No. 10 ( 2023-10), p. 1616-1627
    Type of Medium: Online Resource
    ISSN: 0002-9297
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 1473813-2
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2012
    In:  The Journal of the Acoustical Society of America Vol. 132, No. 3_Supplement ( 2012-09-01), p. 2001-2001
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 132, No. 3_Supplement ( 2012-09-01), p. 2001-2001
    Abstract: Previous research has shown that distinctive features must interact extensively to account for the location and shape of phonological consonant categories in multidimensional acoustic space (de Jong, et al., 161st ASA Meeting). The current analysis focuses on how syllable position (onset vs. coda) modulates feature interactions in the consonants /p, b, t, d, f, v, s, z/. Statistical model comparisons indicate that models allowing pervasive interactions between features and syllable position fit better than do more restrictive models with few or no interactions. Some interactions between syllable position and features are well-documented, such as vowel duration distinguishing voicing more robustly in coda position than in onset position. Other such interactions are novel. For example, consonant duration can cue both voicing and manner contrasts, with duration differences corresponding more strongly to manner contrasts in onset position and more strongly to voicing contrasts in coda position. Similarly, measures of noise power distinguish coronals from labials in onset position, whereas place and voicing interact in codas. These results contribute to a picture of the acoustic distribution of consonants being not only segment-specific, but also determined substantially by the position of the consonant within a syllable.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2012
    detail.hit.zdb_id: 1461063-2
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  • 4
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2014
    In:  The Journal of the Acoustical Society of America Vol. 136, No. 4_Supplement ( 2014-10-01), p. 2082-2082
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 136, No. 4_Supplement ( 2014-10-01), p. 2082-2082
    Abstract: In English, there are at least two mechanisms that affect vowel duration—vowel identity and postvocalic consonant voicing. Previous studies have shown that these two mechanisms have independent effects on vowel duration (Port 1981, Todt 2010). This study presents preliminary results on the use of dynamic time warping to distinguish between the effects of vowel identity and postvocalic consonant voicing on the formant trajectories of English front vowels. Using PraatR (Albin 2014), formant trajectories are extracted from sound files in Praat and imported into R, where the dynamic time warping analysis is conducted using the dtw package (Giorgino 2009). Albin, A. L. (2014). PraatR: An architecture for controlling the phonetics software “Praat” with the R programming language. JASA 135, 2198. Giorgino T. (2009). “Computing and Visualizing Dynamic Time Warping Alignments in R: The dtw Package,”J. Stat. Software, 31(7), pp. 1–24. Port, R. F. (1981). Linguistic timing factors in combination. JASA 69(1), 262–274. R Core Team (2014). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Todt, K. R. (2010). The production of English front vowels by Spanish speakers: A study of vowel duration based on vowel tenseness and consonant voicing, JASA 128, 2489.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2014
    detail.hit.zdb_id: 1461063-2
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  • 5
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2011
    In:  The Journal of the Acoustical Society of America Vol. 129, No. 4_Supplement ( 2011-04-01), p. 2455-2455
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 129, No. 4_Supplement ( 2011-04-01), p. 2455-2455
    Abstract: The relationship between segmental contrasts, often modeled as being composed of distinctive features, and actual acoustic-phonetic properties is complex and many-to-many. Contrasts may be cued by a multiple acoustic-phonetic properties, and acoustic-phonetic properties often cue multiple contrasts. This paper presents a hierarchical multivariate statistical model of the relationship between a suite of 11 acoustic measurements and various target feature systems. Measurements are taken from 10 repetitions of 16 English consonants by 20 native speakers of English in both onset and coda position in nonsense monosyllables. Target feature systems range from models with little generalization across the various segments to ones that fully cross distinctive features to specify all of the segments. The statistical model enables analysis of within-speaker and between-speaker sources of variability in consonant production, and constitutes a principled statistical method for comparing these different distinctive feature models. Also, the role of the statistical model as a baseline for work on relations between different segments in perceptual categorization will be outlined.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2011
    detail.hit.zdb_id: 1461063-2
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  • 6
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2014
    In:  The Journal of the Acoustical Society of America Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2227-2227
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2227-2227
    Abstract: Multi-talker babble can function as an excellent masker for speech stimuli in perception experiments. It has a higher degree of ecological validity than other maskers (e.g., white noise, speech-shaped noise), as it is a type of noise that many listeners encounter on a regular basis in everyday life. In addition, maskers constructed from speech have, by definition, acoustic properties similar to that of the signal. While multi-talker babble is used extensively in speech perception research, relatively little work has been done on the fine-grained acoustic properties of multi-talker babble. We present analyses of a number of acoustic properties of multi-talker babble generated by randomly combining phonetically balanced utterances (e.g., amplitude modulation depth, amplitude modulation frequencies, spectral properties, and spectro-temporal variability). In order to gain a fuller understanding of the nature of multi-talker babble, we analyze how the acoustic properties of babble vary as a function of the number (2–20), gender, and native language (English vs. Mandarin) of the speakers constituting the babble components. Future extensions of this work will (a) focus on how these acoustic variables affect speech perception, and (b) provide the foundation for a web-based system for generating customized samples of multi-talker babble noise for speech perception researchers.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2014
    detail.hit.zdb_id: 1461063-2
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  • 7
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2015
    In:  The Journal of the Acoustical Society of America Vol. 138, No. 6 ( 2015-12-01), p. 3834-3845
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 138, No. 6 ( 2015-12-01), p. 3834-3845
    Abstract: Phonological feature structure is inherently multidimensional, and decades' worth of research in acoustic phonetics has documented both the complex mappings between features and associated acoustic cues as well as the prosodic modulation of these mappings. Most previous studies have focused on how the mean values of acoustic cues vary in complex ways across multiple phonological dimensions, relying on strong assumptions of statistical independence and/or homogeneity of variance across acoustic measures. The present study probes these assumptions by exploring the mapping between phonological voicing, place, and manner features and 8 acoustic cues from tokens of 14 English consonants produced in onset and coda position. Multivariate linear models exhibiting a variety of feature-cue mappings and between-cue statistical relationships were fit to this corpus of acoustic data. Model comparisons indicate that the best statistical description of the data requires pervasive interactions between features with respect to both the locations and the shapes of phonological categories. The implications of these results for work on the production and perception of phonological contrasts is discussed.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2015
    detail.hit.zdb_id: 1461063-2
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