Listeners parse the speech signal effortlessly into words and phrases, but many questions remain about how. One classic idea is that rhythm-related auditory principles play a role, in particular, that a psycho-acoustic “iambic-trochaic law” (ITL) ensures that alternating sounds varying in intensity are perceived as recurrent binary groups with initial prominence (trochees), while alternating sounds varying in duration are perceived as binary groups with final prominence (iambs). We test the hypothesis that the ITL is in fact an indirect consequence of the parsing of speech along two in-principle orthogonal dimensions: prominence and grouping. Results from several perception experiments show that the two dimensions, prominence and grouping, are each reliably cued by both intensity and duration, while foot type is not associated with consistent cues. The ITL emerges only when one manipulates either intensity or duration in an extreme way. Overall, the results suggest that foot perception is derivative of the cognitively more basic decisions of grouping and prominence, and the notions of trochee and iamb may not play any direct role in speech parsing. A task manipulation furthermore gives new insight into how these decisions mutually inform each other.

1.
Abboub
,
N.
,
Boll-Avetisyan
,
N.
,
Bhatara
,
A.
,
Höhle
,
B.
, and
Nazzi
,
T.
(
2016
). “
An exploration of rhythmic grouping of speech sequences by French- and German-learning infants
,”
Front. Hum. Neurosci.
10
,
292
.
2.
Abercrombie
,
D.
(
1964
). “
A phonetician's view of verse structure
,”
Linguistics
2
(
6
),
5
13
.
3.
Arvaniti
,
A.
(
2012
). “
The usefulness of metrics in the quantification of speech rhythm
,”
J. Phon.
40
(
3
),
351
373
.
4.
Aslin
,
R.
,
Saffran
,
J.
, and
Newport
,
E.
(
1998
). “
Computation of conditional probability statistics by 8-month-old infants
,”
Psychol. Sci.
9
,
321
324
.
5.
Beckman
,
M. E.
(
1986
).
Stress and Non-Stress Accent
(
Foris
,
Dordrecht, Netherlands
).
6.
Beckman
,
M. E.
, and
Edwards
,
J.
(
1990
). “
Lengthenings and shortenings and the nature of prosodic constituency
,” in
Papers in Laboratory Phonology I—Between the Grammar and Physics of Speech
, edited by
M. E.
Beckman
and
J.
Kingston
(
Cambridge University Press
,
Cambridge, UK
), p.
152
.
7.
Bell
,
A.
(
1977
). “
Accent placement and perception of prominence in rhythmic structures
,” in
Studies in Stress and Accent
, edited by
L.
Hyman
(
USC
,
Los Angeles, CA
), pp.
1
13
.
8.
Bhatara
,
A.
,
Boll-Avetisyan
,
N.
,
Agus
,
T.
,
Höhle
,
B.
, and
Nazzi
,
T.
(
2016
). “
Language experience affects grouping of musical instrument sounds
,”
Cogn. Sci.
40
(
7
),
1816
1830
.
9.
Bhatara
,
A.
,
Boll-Avetisyan
,
N.
,
Unger
,
A.
,
Nazzi
,
T.
, and
Höhle
,
B.
(
2013
). “
Native language affects rhythmic grouping of speech
,”
J. Acoust. Soc. Am.
134
(
5
),
3828
3843
.
10.
Bion
,
R. A.
,
Benavides-Varela
,
S.
, and
Nespor
,
M.
(
2011
). “
Acoustic markers of prominence influence infants' and adults' segmentation of speech sequences
,”
Lang. Speech
54
(
1
),
123
140
.
11.
Boersma
,
P.
, and
Weenink
,
D.
(
2020
). “
Praat: Doing phonetics by computer (version 6.1.16) [computer program]
,” http://www.praat.org (Last viewed January 31, 2020).
12.
Bögel
,
T.
(
2020
). “
Rhythmic phrasing of prosodic words: A diachronic perspective from Old English, supported by experimental evidence from German
,” in
Proceedings of NELS 50
, October 25–27,
Cambridge, MA
.
13.
Boll-Avetisyan
,
N.
,
Bhatara
,
A.
,
Unger
,
A.
,
Nazzi
,
T.
, and
Höhle
,
B.
(
2016
). “
Effects of experience with L2 and music on rhythmic grouping by French listeners
,”
Bilingualism
19
(
5
),
971
986
.
14.
Boll-Avetisyan
,
N.
,
Bhatara
,
A.
,
Unger
,
A.
,
Nazzi
,
T.
, and
Höhle
,
B.
(
2020
). “
Rhythmic grouping biases in simultaneous bilinguals
,”
Bilingualism
23
(
5
),
1070
1081
.
15.
Bolton
,
T. L.
(
1894
). “
Rhythm
,”
Am. J. Psychol.
6
(
2
),
145
238
.
16.
Bregman
,
A. S.
, and
Campbell
,
J.
(
1971
). “
Primary auditory stream segregation and perception of order in rapid sequences of tones
,”
J. Exp. Psychol.
89
(
2
),
244
249
.
17.
Bürkner
,
P.-C.
(
2018
). “
Advanced Bayesian multilevel modeling with the R package brms
,”
R J.
10
(
1
),
395
411
.
18.
Bürkner
,
P.-C.
, and
Charpentier
,
E.
(
2020
). “
Modelling monotonic effects of ordinal predictors in Bayesian regression models
,”
Br. J. Math. Stat. Psychol.
73
(
3
),
420
451
.
19.
Chrabaszcz
,
A.
,
Winn
,
M.
,
Lin
,
C. Y.
, and
Idsardi
,
W. J.
(
2014
). “
Acoustic cues to perception of word stress by English, Mandarin, and Russian speakers
,”
J. Speech. Lang. Hear. Res.
57
(
4
),
1468
1479
.
20.
Crowhurst
,
M.
(
2016
). “
Iambic-trochaic law effects among native speakers of Spanish and English
,”
Lab. Phonol.
7
(
1
),
12
41
.
21.
Crowhurst
,
M.
(
2020
). “
The iambic/trochaic law: Nature or nurture?
,”
Lang. Linguist. Compass
14
(
1
),
1
16
.
22.
Crowhurst
,
M.
, and
Teodocio Olivares
,
A.
(
2014
). “
Beyond the iambic-trochaic law: The joint influence of duration and intensity on the perception of rhythmic speech
,”
Phonology
31
(
1
),
51
94
.
23.
Cutler
,
A.
, and
Butterfield
,
S.
(
1992
). “
Rhythmic cues to speech segmentation: Evidence from juncture misperception
,”
J. Mem. Lang.
31
(
2
),
218
236
.
24.
Cutler
,
A.
, and
Carter
,
D.
(
1987
). “
The predominance of strong initial syllables in the English vocabulary
,”
Comput. Speech Lang.
2
,
133
142
.
25.
Cutler
,
A.
, and
Norris
,
D.
(
1988
). “
The role of strong syllables in segmentation for lexical access
,”
J. Exp. Psychol. Hum. Percept. Perform.
14
(
1
),
113
121
.
26.
Dauer
,
R.
(
1983
). “
Stress-timing and syllable-timing reanalyzed
,”
J. Phon.
11
(
1
),
51
62
.
27.
Davidson
,
L.
(
2016
). “
Variability in the implementation of voicing in American English obstruents
,”
J. Phon.
54
,
35
50
.
28.
De Leeuw
,
J. R.
(
2015
). “
jsPsych: A JavaScript library for creating behavioral experiments in a Web browser
,”
Behav. Res.
47
(
1
),
1
12
.
29.
Fraisse
,
P.
(
1956
).
Les Structures Rythmiques (Rhythmic Structures)
(
Studia Psychologica, Publications Universitaires de Louvain
,
Louvain, Belgium
).
30.
Fry
,
D.
(
1958
). “
Experiments in the perception of stress
,”
Lang. Speech
1
(
2
),
126
152
.
31.
Gordon
,
M.
(
2007
).
Syllable Weight: Phonetics, Phonology, Typology
(
Routledge
,
New York
).
32.
Gussenhoven
,
C.
(
2004
).
The Phonology of Tone and Intonation
(
Cambridge University
,
Cambridge, UK
).
33.
Handel
,
S.
(
1989
).
Listening: An Introduction to the Perception of Auditory Events
(
MIT
,
Cambridge, MA
).
34.
Hay
,
J. F.
, and
Diehl
,
R. L.
(
2007
). “
Perception of rhythmic grouping: Testing the iambic/trochaic law
,”
Percept. Psychophys.
69
(
1
),
113
122
.
35.
Hay
,
J. F.
, and
Saffran
,
J. R.
(
2012
). “
Rhythmic grouping biases constrain infant statistical learning
,”
Infancy
17
(
6
),
610
641
.
36.
Hayes
,
B.
(
1984
). “
The phonology of rhythm in English
,”
Linguist. Inq.
15
,
33
74
.
37.
Hayes
,
B.
(
1995
).
Metrical Stress Theory: Principles and Case Studies
(
University of Chicago
,
Chicago
).
38.
Heffner
,
C. C.
, and
Slevc
,
L. R.
(
2015
). “
Prosodic structure as a parallel to musical structure
,”
Front. Psychol.
6
,
1962
.
39.
Iversen
,
J. R.
,
Patel
,
A. D.
, and
Ohgushi
,
K.
(
2008
). “
Perception of rhythmic grouping depends on auditory experience
,”
J. Acoust. Soc. Am.
124
(
4
),
2263
2271
.
40.
Jakobson
,
R.
,
Fant
,
G.
, and
Halle
,
M.
(
1951
).
Preliminaries to Speech Analysis: The Distinctive Features and Their Correlates
(
MIT
,
Cambridge, MA
).
41.
Katz
,
J.
(
2022
). “
Musical grouping as prosodic implementation
,”
Linguist. Philos.
(published online).
42.
Klatt
,
D. H.
(
1975
). “
Vowel lengthening is syntactically determined in a connected discourse
,”
J. Phon.
3
,
129
140
.
43.
Lahiri
,
A.
, and
Plank
,
F.
(
2010
). “
Phonological phrasing in Germanic: The judgement of history, confirmed through experiment
,”
Trans. Philol. Soc.
108
,
370
398
.
44.
Lehiste
,
I.
(
1970
).
Suprasegmentals
(
MIT
,
Cambridge, MA
).
45.
Lerdahl
,
F.
, and
Jackendoff
,
R. S.
(
1983
).
A Generative Theory of Tonal Music
(
MIT
,
Cambridge, MA
).
46.
Low
,
E. L.
,
Grabe
,
E.
, and
Nolan
,
F.
(
2000
). “
Quantitative characterizations of speech rhythm: Syllable-timing in Singapore English
,”
Lang. Speech
43
(
4
),
377
401
.
47.
Makowski
,
D.
,
Ben-Shachar
,
M. S.
,
Chen
,
S.
, and
Lüdecke
,
D.
(
2019
). “
Indices of effect existence and significance in the Bayesian framework
,”
Front. Psychol.
10
,
2767
.
48.
Mattys
,
S. L.
, and
Bortfeld
,
H.
(
2016
). “
Speech segmentation
,” in
Speech Perception and Spoken Word Recognition
, edited by
G.
Gaskell
and
J.
Mirkovic
(
Routledge
,
New York
), pp.
55
75
.
49.
Mattys
,
S. L.
,
Jusczyk
,
P. W.
,
Luce
,
P. A.
, and
Morgan
,
J. L.
(
1999
). “
Phonotactic and prosodic effects on word segmentation in infants
,”
Cogn. Psychol.
38
(
4
),
465
494
.
50.
McElreath
,
R.
(
2020
).
Statistical Rethinking: A Bayesian Course with Examples in R and Stan
, 2nd ed. (
CRC
,
Boca Raton, FL
).
51.
Molnar
,
M.
,
Carreiras
,
M.
, and
Gervain
,
J.
(
2016
). “
Language dominance shapes non-linguistic rhythmic grouping in bilinguals
,”
Cognition
152
,
150
159
.
52.
Molnar
,
M.
,
Lallier
,
M.
, and
Carreiras
,
M.
(
2014
). “
The amount of language exposure determines nonlinguistic tone grouping biases in infants from a bilingual environment
,”
Lang. Learn.
64
(
s2
),
45
64
.
53.
Nespor
,
M.
,
Shukla
,
M.
,
van de Vijver
,
R.
,
Avesani
,
C.
,
Schraudolf
,
H.
, and
Donati
,
C.
(
2008
). “
Different phrasal prominence realizations in VO and OV languages
,”
Lingue Linguaggio
7
(
2
),
139
168
.
54.
Nicenboim
,
B.
,
Schad
,
D.
, and
Vasishth
,
S.
(
2022
). “
An introduction to Bayesian data analysis for cognitive science
,” https://vasishth.github.io/bayescogsci/book/ (Last viewed July 2022).
55.
Nicenboim
,
B.
, and
Vasishth
,
S.
(
2016
). “
Statistical methods for linguistic research: Foundational ideas—Part II
,”
Lang. Linguist. Compass
10
(
11
),
591
613
.
56.
Oller
,
D. K.
(
1973
). “
The effect of position in utterance on speech segment duration in English
,”
J. Acoust. Soc. Am.
54
(
5
),
1235
1247
.
57.
Paschen
,
L.
,
Fuchs
,
S.
, and
Seifart
,
F.
(
2022
). “
Final lengthening and vowel length in 25 languages
,”
J. Phon.
94
,
101179
.
58.
Patel
,
A. D.
(
2007
).
Music, Language, and the Brain
(
Oxford University
,
London
).
59.
Peña
,
M.
,
Bion
,
R. A.
, and
Nespor
,
M.
(
2011
). “
How modality specific is the iambic–trochaic law? Evidence from vision
,”
J. Exp. Psychol. Learn. Mem. Cogn.
37
(
5
),
1199
1208
.
60.
Povel
,
D.-J.
, and
Okkerman
,
H.
(
1981
). “
Accents in equitone sequences
,”
Percept. Psychophys.
30
(
6
),
565
572
.
61.
Ramus
,
F.
,
Nespor
,
M.
, and
Mehler
,
J.
(
2000
). “
Correlates of linguistic rhythm in the speech signal
,”
Cognition
73
(
3
),
265
292
.
62.
Revithiadou
,
A.
(
2004
). “
The iambic/trochaic law revisited
,”
Leiden Pap. Linguist.
1
,
37
62
.
63.
Rice
,
C.
(
1992
). “
Binarity and ternarity in metrical theory: Parametic extensions
,” Ph.D. thesis,
University of Texas
,
Austin, TX
.
64.
Sievers
,
E.
(
1901
).
Grundzüge der Phonetik: zur Einführung in Das Studium Der Lautlehre Der Indogermanischen Sprachen (Principles of Phonetics: An Introduction to the Study of Phonetics in the Indo-European Languages)
(
Breitkopf & Härtel
,
Leipzig, Germany
), Vol. 1.
65.
Sonderegger
,
M.
(
2023
).
Regression Modeling for Linguistic Data
(
MIT
,
Cambridge, MA
), in press, available at https://mitpress.mit.edu/9780262045483/regression-modeling-for-linguistic-data/.
66.
Sonderegger
,
M.
,
Stuart-Smith
,
J.
,
Knowles
,
T.
,
Macdonald
,
R.
, and
Rathcke
,
T.
(
2020
). “
Structured heterogeneity in Scottish stops over the twentieth century
,”
Language
96
(
1
),
94
125
.
67.
Stan Development Team
(
2019
). “
Stan modeling language users guide and reference manual (version 2.29)
,” https://mc-stan.org (Last viewed July 2022).
68.
Stan Development Team
(
2021
). “
RStan: The R interface to Stan
,” https://mc-stan.org/ (Last viewed July 2022).
69.
Steele
,
J.
(
1775
).
An Essay towards Establishing the Melody and Measure of Speech to Be Expressed and Perpetuated by Peculiar Symbols
(
W. Bowyer and J. Nichols
,
London
).
70.
Sweet
,
H.
(
1876
). “
Words, logic and grammar
,”
Trans. Philol. Soc.
16
(
1
),
470
503
.
71.
Turk
,
A. E.
, and
Shattuck-Hufnagel
,
S.
(
2000
). “
Word-boundary-related duration patterns in English
,”
J. Phon.
28
(
4
),
397
440
.
72.
Vasishth
,
S.
,
Nicenboim
,
B.
,
Beckman
,
M. E.
,
Li
,
F.
, and
Kong
,
E. J.
(
2018
). “
Bayesian data analysis in the phonetic sciences: A tutorial introduction
,”
J. Phon.
71
,
147
161
.
73.
Vos
,
P. G.
(
1977
). “
Temporal duration factors in the perception of auditory rhythmic patterns
,”
Sci. Aesthetics
1
,
183
199
.
74.
Wagner
,
M.
(
2022
). “
Two-dimensional parsing explains the iambic-trochaic law
,”
Psychol. Rev.
129
(
2
),
268
288
.
75.
Wagner
,
M.
,
Iturralde Zurita
,
A.
, and
Zhang
,
S.
(
2021
). “
Parsing speech for grouping and prominence, and the typology of rhythm
,” in
Proceedings of Interspeech
, pp.
2656
2660
.
76.
Wagner
,
M.
, and
McAuliffe
,
M.
(
2019
). “
The effect of focus prominence on phrasing
,”
J. Phon.
77
,
100930
.
77.
Warren
,
R. M.
, and
Gregory
,
R. L.
(
1958
). “
An auditory analogue of the visual reversible figure
,”
Am. J. Psychol.
71
(
3
),
612
613
.
78.
Wertheimer
,
M.
(
1923
). “
Untersuchungen zur Lehre von der Gestalt II” (“Investigations into the doctrine of Gestalt II”)
,
Psychol. Forsch.
4
(
1
),
301
350
.
79.
Wightman
,
C. W.
,
Shattuck-Hufnagel
,
S.
,
Ostendorf
,
M.
, and
Price
,
P. J.
(
1992
). “
Segmental durations in the vicinity of prosodic phrase boundaries
,”
J. Acoust. Soc. Am.
91
,
1707
1717
.
80.
Woodrow
,
H.
(
1909
).
A Quantitative Study of Rhythm: The Effect of Variations in Intensity, Rate and Duration
(
Science
,
New York
), pp.
1
66
.
81.
Woods
,
K. J.
,
Siegel
,
M. H.
,
Traer
,
J.
, and
McDermott
,
J. H.
(
2017
). “
Headphone screening to facilitate web-based auditory experiments
,”
Atten. Percept. Psychophys.
79
(
7
),
2064
2072
.
82.
Yoshida
,
K. A.
,
Iversen
,
J. R.
,
Patel
,
A. D.
,
Mazuka
,
R.
,
Nito
,
H.
,
Gervain
,
J.
, and
Werker
,
J. F.
(
2010
). “
The development of perceptual grouping biases in infancy: A Japanese-English cross-linguistic study
,”
Cognition
115
(
2
),
356
361
.

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