Th
e pr
es
ent study
examin
ed list
en
ers鈥?id
entification and rating of words in passag
es as stutt
er
ed wh
en th
e duration and fr
equ
ency of occurr
enc
e of sound prolongations w
er
e manipulat
ed. Thirty-six participants list
en
ed to a 219-word passag
e containing voic
el
ess fricativ
es digitally incr
eas
ed from th
eir normal durations to 200, 300, and 420 ms. List
en
ers h
eard on
e of thr
ee passag
es that contain
ed 5%, 10%or 15%alt
er
ed stimuli within th
e passag
e. In Condition 1, list
en
ers id
entifi
ed words consid
er
ed stutt
er
ed. In Condition 2, list
en
ers rat
ed sp
ecifically s
el
ect
ed words in th
e passag
e r
elativ
e to th
e ext
ent th
ey consid
er
ed th
e words stutt
er
ed. Th
e r
esults show
ed that (1) both th
e duration and th
e fr
equ
ency of occurr
enc
e of th
e alt
er
ed phon
em
es within th
e paragraph l
ength mat
erial had an impact on list
en
ers鈥?p
erc
eption of words id
entifi
ed as a sound prolongation; (2) list
en
ers gav
e significantly high
er ratings in Condition 2 than Condition 1 wh
en d
et
ermining if a word was stutt
er
ed or produc
ed flu
ently. Th
e implications of th
es
e r
esults ar
e discuss
ed.
Learning outcomes: After reading this article, the reader will be able to: (1) Describe the past literature on listener perceptions of stuttering. (2) Differentiate between listener's perceptions of sound prolongations that are altered in duration and frequency of occurrence. (3) Describe how paragraph-length speech material compares to past research that has used isolated utterances.