Eve Olson (Honors Thesis)
The goal of this project will be to study the pronunciation by Arabic speakers of stop various stop consonants in regards to voice onset time. In English, there exists a phonological contrast between voiced and voiceless pronunciations of bilabial, alveolar, and velar stop consonants. These pairs are [p]/[b], [t]/[d], and [k]/[g] respectively. In [some dialects of] Arabic, the voiced and voiceless versions of the alveolar stop are contrastive, but the same does not apply to bilabial and velar stops. [b] and [k] are included in the phonological inventory, but [p] and [g] do not. This leads to a question of pronunciation: if voice onset time for the [t]/[d] pair is contrastive as it is in English, do Arabic speakers typically pronounce [b] with a similar voice onset time to that of English speakers, or does Arabic speakers’ voice onset time vary more liberally due to the absence of a contrastive voiceless equivalent? And do Arabic speakers’ pronunciation of [k] coincide with that of English speakers, or does it vary because it has no contrastive voiced equivalent?
To conduct this study, we plan to record the speech of native Arabic speakers and to analyze their pronunciation of the phonemes in question. We will create a list of Arabic nonwords in which the phonemes appear as an onset, and we will mix into the list other distractor words containing other phonemes. Each word will be preceded by the phrase “أُحِبُ كَلِمَة...” (I love the word…), and the subjects will be asked to read each sentence aloud in a normal speaking voice. In order to collect a wide range of data, we will place each phoneme with a variety of word endings, as following consonants and vowels may influence pronunciation.
We will conduct an identical experiment with English subjects and a list of English nonwords that use the appropriate phonemes in English. Each word will be proceeded by “I love the word…” and as with the Arabic experiment, the subjects will be asked to read each line in a normal speaking voice.
Bruce Smith and Rachel Hayes-Harb
We compare non-native (L2) speakers to native (L1) talkers to determine whether the L2 speakers showed similar or different vowel formant patterns than the L1 talkers and also whether the L2 subjects showed similar or greater intra-subject variability relative to the L1 talkers when producing American English vowels. First and second formants of the tense/lax vowel pairs / i -Ｉ/, / e - ɛ /, and / u - ʊ / were measured and Coefficient of Variation was calculated for 10 native speakers of American English and 30 non-native speakers of English from three different language backgrounds (10 Mandarin speakers, 10 Korean speakers, and 10 Spanish speakers). Overall, the L2 subjects’ vowel formant patterns were found to be comparable to those of L1 speakers approximately half of the time. Whether the L2 talkers’ vowel formants were native-like or not, however, they seldom showed greater intra-subject variability than the L1 speakers of American English.
Rachel Hayes-Harb and Cate Showalter
Over the past several years we have seen increased interest in the role that orthographic input plays in second language (L2) phonological and lexical development. A question in particular focus has been whether learners benefit from exposure to a systematic graphemic contrast when learning to distinguish L2 lexical items involving a corresponding (novel) phonological contrast. Findings with respect to the influence of orthographic input have been somewhat mixed, with orthographic input sometimes powerfully enhancing L2 lexical encoding of novel contrasts (e.g., Escudero, Hayes-Harb & Mitterer, 2008), and in other cases having no effect at all (e.g., Simon, Chambless & Alves 2010). In a departure from this focus on L2 phonological contrast acquisition, in the present work we focus instead on the role of orthographic input in the acquisition of a novel L2 phonological process, that of German final devoicing by native English participants. In German, final obstruents are devoiced such that underlying contrasts are (mostly) neutralized (e.g., /rad/ and /rat/, spelled <Rad> and <Rat>, both pronounced [rat]). Native English speakers were exposed to German-like minimal pairs (e.g., /ʃtɑit/ and /ʃtɑid/, both pronounced [ʃtɑit]) along with pictured meanings, and in some cases, their written forms (e.g., <Steit> and <Steid>). At test, subjects whose input included written forms were more likely to produce final voiced obstruents when naming the pictures, indicating that access to spelled forms in the input interfered with participants’ acquisition of target-like surface forms. In a separate experiment, we attempted to moderate the negative impact of orthographic input by providing explicit instruction to subjects concerning the “misleading” nature of the words’ spellings, with no effect. Together these findings indicate a powerful effect of orthographic input on L2 lexical-phonological development that is not readily overcome by instruction.
Kristie Durham & Rachel Hayes-Harb
Acoustic and perceptual measures were used to investigate the perception of Arabic emphasis, a secondary velar or pharyngeal constriction, by native English speakers. In an AXB task using cross-spliced CVCs with plain and emphatic onsets and rimes, the native English speakers were shown to rely more heavily on the rimes than onsets, with discrimination accuracy greatest when the vowel was /æ/, followed by /u/ and /i/. To explore this effect of vowel, a cross-language vowel identification task and acoustic analysis were conducted. When following emphatic onsets, Arabic /æ/ was identified by native English speakers as a systematically different English vowel than when following plain onsets, while Arabic /i/ and /u/ failed to exhibit such a differential identification pattern. Support for this Arabic-to-English perceptual mapping was provided by the comparative acoustic analysis. The raised F1 and lowered F2 in vowels following emphatic onsets resulted in the low Arabic vowel being acoustically closest to distinct English vowels in plain versus emphatic contexts, while Arabic /i/ and /u/ exhibited substantial overlap in the acoustically closest English vowels in plain and emphatic contexts.