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Hurtig, A., Van de Poll, M. K., Pekkola, E. P., Hygge, S., Ljung, R. & Sörqvist, P. (2016). Children's recall of words spoken in their first and second language: Effects of Signal-to-Noise Ratio and Reverberation Time. Frontiers in Psychology, 6(JAN), Article ID 2029.
Åpne denne publikasjonen i ny fane eller vindu >>Children's recall of words spoken in their first and second language: Effects of Signal-to-Noise Ratio and Reverberation Time
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2016 (engelsk)Inngår i: Frontiers in Psychology, ISSN 1664-1078, E-ISSN 1664-1078, Vol. 6, nr JAN, artikkel-id 2029Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Speech perception runs smoothly and automatically when there is silence in the background, but when the speech signal is degraded by background noise or by reverberation, effortful cognitive processing is needed to compensate for the signal distortion. Previous research has typically investigated the effects of signal-to-noise ratio (SNR) and reverberation time in isolation, whilst few have looked at their interaction. In this study, we probed how reverberation time and SNR influence recall of words presented in participants' first- (L1) and second-language (L2). A total of 72 children (10 years old) participated in this study. The to-be-recalled wordlists were played back with two different reverberation times (0.3 and 1.2 s) crossed with two different SNRs (+3 dBA and +12 dBA). Children recalled fewer words when the spoken words were presented in L2 in comparison with recall of spoken words presented in L1. Words that were presented with a high SNR (+12 dBA) improved recall compared to a low SNR (+3 dBA). Reverberation time interacted with SNR to the effect that at +12 dB the shorter reverberation time improved recall, but at +3 dB it impaired recall. The effects of the physical sound variables (SNR and reverberation time) did not interact with language. © 2016 Hurtig, Keus van de Poll, Pekkola, Hygge, Ljung and Sörqvist.

Emneord
Children, Classroom acoustics, Reverberation time, Second-language, Signal-to-noise ratio, Speech perception
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urn:nbn:se:du-21289 (URN)10.3389/fpsyg.2015.02029 (DOI)2-s2.0-84959420428 (Scopus ID)
Tilgjengelig fra: 2016-03-24 Laget: 2016-03-24 Sist oppdatert: 2017-11-30
Hurtig, A., Sörqvist, P., Ljung, R., Hygge, S. & Rönnberg, J. (2016). Student's second-language grade may depend on classroom listening position. PLoS ONE, 11(6)
Åpne denne publikasjonen i ny fane eller vindu >>Student's second-language grade may depend on classroom listening position
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2016 (engelsk)Inngår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, nr 6Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The purpose of this experiment was to explore whether listening positions (close or distant location from the sound source) in the classroom, and classroom reverberation, influence students' score on a test for second-language (L2) listening comprehension (i.e., comprehension of English in Swedish speaking participants). The listening comprehension test administered was part of a standardized national test of English used in the Swedish school system. A total of 125 high school pupils, 15 years old, participated. Listening position was manipulated within subjects, classroom reverberation between subjects. The results showed that L2 listening comprehension decreased as distance from the sound source increased. The effect of reverberation was qualified by the participants' baseline L2 proficiency. A shorter reverberation was beneficial to participants with high L2 proficiency, while the opposite pattern was found among the participants with low L2 proficiency. The results indicate that listening comprehension scores-and hence students' grade in English-may depend on students' classroom listening position.

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urn:nbn:se:du-21731 (URN)10.1371/journal.pone.0156533 (DOI)000377824800016 ()27304980 (PubMedID)
Tilgjengelig fra: 2016-06-17 Laget: 2016-06-17 Sist oppdatert: 2017-11-28bibliografisk kontrollert
Sorqvist, P., Hurtig, A., Ljung, R. & Ronnberg, J. (2014). High second-language proficiency protects against the effects of reverberation on listening comprehension. Scandinavian Journal of Psychology, 55(2), 91-96
Åpne denne publikasjonen i ny fane eller vindu >>High second-language proficiency protects against the effects of reverberation on listening comprehension
2014 (engelsk)Inngår i: Scandinavian Journal of Psychology, ISSN 0036-5564, E-ISSN 1467-9450, Vol. 55, nr 2, s. 91-96Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The purpose of this experiment was to investigate whether classroom reverberation influences second-language (L2) listening comprehension. Moreover, we investigated whether individual differences in baseline L2 proficiency and in working memory capacity (WMC) modulate the effect of reverberation time on L2 listening comprehension. The results showed that L2 listening comprehension decreased as reverberation time increased. Participants with higher baseline L2 proficiency were less susceptible to this effect. WMC was also related to the effect of reverberation (although just barely significant), but the effect of WMC was eliminated when baseline L2 proficiency was statistically controlled. Taken together, the results suggest that top-down cognitive capabilities support listening in adverse conditions. Potential implications for the Swedish national tests in English are discussed.

Emneord
speech perception, comprehension, working memory capacity, second language, Reverberation
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urn:nbn:se:du-18637 (URN)10.1111/sjop.12115 (DOI)000333054400001 ()24646043 (PubMedID)
Tilgjengelig fra: 2015-07-01 Laget: 2015-06-29 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Fredriksson, A., Stigsdotter, I. M., Hurtig, A., Ewalds-Kvist, B. & Archer, T. (2011). Running wheel activity restores MPTP-induced deficits. Journal of neural transmission, 118(3), 407-420
Åpne denne publikasjonen i ny fane eller vindu >>Running wheel activity restores MPTP-induced deficits
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2011 (engelsk)Inngår i: Journal of neural transmission, ISSN 0300-9564, E-ISSN 1435-1463, Vol. 118, nr 3, s. 407-420Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Wheel-running and treadmill running physical exercise have been shown to alleviate parkinsonism in both laboratory and clinical studies. MPTP was administered to C57/BL6 mice using two different procedures: (a) administration of a double-dose regime (MPTP 2 × 20 or 2 × 40 mg/kg, separated by a 24-h interval), vehicle (saline 5 ml/kg) or saline (vehicle 2 × 5 ml/kg), and (b) administration of a single-dose weekly regime (MPTP 1 × 40 mg/kg) or saline (vehicle 1 × 5 ml/kg) repeated over 4 consecutive weeks. For each procedure, two different physical exercise regimes were followed: (a) after the double-dose MPTP regime, mice were given daily 30-min periods of wheel-running exercise over 5 consecutive days/week or placed in a cage in close proximity to the running wheels for 3 weeks. (b) Mice were either given wheel-running activity on 4 consecutive days (30-min periods) or placed in a cage nearby for 14 weeks. Behavioral testing was as follows: (a) after 3 weeks of exercise/no exercise, mice were tested for spontaneous motor activity (60 min) and subthreshold l-Dopa (5 mg/kg)-induced activity. (b) Spontaneous motor activity was measured on the fifth day during each of the each of the first 5 weeks (Tests 1–5), about 1 h before injections (first 4 weeks), and continued on the 5th days of the 6th to the 14th weeks (Tests 6–14). Subthreshold l-Dopa (5 mg/kg)-induced activity was tested on the 6th, 8th, 10th, 12th and 14th weeks. (b) Mice from the single-dose MPTP weekly regime were killed during the 15th week and striatal regions taken for dopamine analysis, whereas frontal and parietal cortex and hippocampus were taken for analysis of brain-derived neurotrophic factor (BDNF). It was shown that in both experiments, i.e., the double-dose regime and single-dose weekly regime of MPTP administration, physical activity attenuated markedly the MPTP-induced akinesia/hypokinesia in both the spontaneous motor activity and restored motor activity completely in subthreshold l-Dopa tests. Running wheel activity attenuated markedly the loss of dopamine due to repeated administrations of MPTP. BDNF protein level in the parietal cortex was elevated by the MPTP insult and increased further by physical exercise. Physical running wheel exercise alleviated both the functional and biomarker expressions of MPTP-induced parkinsonism.

sted, utgiver, år, opplag, sider
Wien: Springer, 2011
Emneord
Exercise, Running wheel, MPTP, Motor activity, L-Dopa, Locomotion, Rearing, Motor activity, Restoration, Dopamine, BDNF, C57/BL6 mice
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urn:nbn:se:du-5454 (URN)10.1007/s00702-010-0474-8 (DOI)000288558600012 ()
Tilgjengelig fra: 2011-03-22 Laget: 2011-03-22 Sist oppdatert: 2017-12-07bibliografisk kontrollert
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ORCID-id: ORCID iD iconorcid.org/0000-0002-2730-7200