Prenatal daily musical exposure is associated with enhanced neural representation of speech fundamental frequency: Evidence from neonatal frequency-following responses

Fetal hearing experiences shape the linguistic and musical preferences of neonates. From the very first moment after birth, newborns prefer their native language, recognize their mother's voice, and show a greater responsiveness to lullabies presented during pregnancy. Yet, the neural underpinnings of this experience inducing plasticity have remained elusive. Here we recorded the frequency-following response (FFR), an auditory evoked potential elicited to periodic complex sounds, to show that prenatal music exposure is associated to enhanced neural encoding of speech stimuli periodicity, which relates to the perceptual experience of pitch. FFRs were recorded in a sample of 60 healthy neonates born at term and aged 12–72 hours. The sample was divided into two groups according to their prenatal musical exposure (29 daily musically exposed; 31 not-daily musically exposed). Prenatal exposure was assessed retrospectively by a questionnaire in which mothers reported how often they sang or listened to music through loudspeakers during the last trimester of pregnancy. The FFR was recorded to either a /da/ or an /oa/ speech-syllable stimulus. Analyses were centered on stimuli sections of identical duration (113 ms) and fundamental frequency (F₀ = 113 Hz). Neural encoding of stimuli periodicity was quantified as the FFR spectral amplitude at the stimulus F₀. Data revealed that newborns exposed daily to music exhibit larger spectral amplitudes at F₀ as compared to not-daily musically-exposed newborns, regardless of the eliciting stimulus. Our results suggest that prenatal music exposure facilitates the tuning to human speech fundamental frequency, which may support early language processing and acquisition.

Research Highlights

• Frequency-following responses to speech were collected from a sample of neonates prenatally exposed to music daily and compared to neonates not-daily exposed to music.
• Neonates who experienced daily prenatal music exposure exhibit enhanced frequency-following responses to the periodicity of speech sounds.
• Prenatal music exposure is associated with a fine-tuned encoding of human speech fundamental frequency, which may facilitate early language processing and acquisition.

     

The effectiveness of a school mindfulness-based intervention on the neural correlates of inhibitory control in children at risk: A randomized control trial

Interest in the applications of mindfulness practice in education is growing in the scientific community. Recent research has shown that mindfulness practice in schools may be beneficial for executive functions (EFs) which are abilities crucial for healthy development. The study of the effects of mindfulness practices on children's neural correlates of EFs, particularly inhibitory control, may provide relevant information about the impact and mechanisms of mindfulness-based interventions (MBIs) in children. The aim of the present study was to investigate the effects of a MBI in elementary school children on the neural correlates of inhibitory control via a randomized controlled trial. Children from two 4th grade classrooms and two 5th grade classrooms located in a school identified as having low socioeconomic status in Santiago de Chile were randomly assigned to either receive a MBI or serve as active controls and receive a social skills program. Both before and after the interventions, electroencephalographic activity was recorded during a modified version of the Go/Nogo task in a subsample of children in each group. Additionally, teachers completed questionnaires of students’ EFs and students completed self-report measures. Results revealed increases in EFs assessed by questionnaires together with improved P3 amplitude associated with successful response inhibition in children who received the MBI compared to active controls. These results contribute to the understanding of the ways in which mindfulness practices can promote the development of inhibitory control together with EF improvement, factors identified as critical for children's social and emotional development and positive mental health.

Research Highlights

• This study investigated the effects of a mindfulness-based intervention in children from a low socioeconomic status school on neural correlates of EFs.
• Children performed a Go/Nogo task while electroencephalographic activity was recorded and completed questionnaires before and after a MBI or an active control program.
• Improvements in EFs assessed by questionnaires together with an increased Nogo-P3 activity associated with successful inhibition in children who received the MBI were found.
• The results could contribute to understand how mindfulness practice can promote the development of inhibitory control in children from vulnerable populations.

     

Meta-analytical review of teacher burnout across 36 societies: the role of national learning assessments and gender egalitarianism

Objective: Teacher burnout has hardly been compared across countries, although it has become a global health issue. This review aimed to examine teacher burnout (effect size) and its variation across countries by testing the effects of gender, gender egalitarianism, and national learning assessments (NLAs).

Design: A systematic literature search was carried out using keywords. In all, 156 studies from 36 countries were included that used quantitative methodology. Meta-analytical procedures were used to estimate effect sizes of three dimensions of burnout. Two-level multilevel mixed-effect model tested moderator variables at the country level.

Results: The overall effect size found for emotional exhaustion was 38.29 (95% CI = 35.26, 41.32), 29.45 (95% CI = 25.91, 32.99) for cynicism, and 68.75 (95% CI = 65.63, 71.87) for personal accomplishment, with significant differences across countries. Gender was negatively significant for personal accomplishment. Significant linear, curvilinear and interaction effects of NLAs and gender egalitarianism explained variations in burnout. Whereas more NLAs tends to increase burnout, more gender egalitarianism tends to decrease it, although this effect is not linear.

Conclusion: Teacher burnout, as a health issue, varies significantly across countries suggesting that programmes to prevent this problem should consider environmental (educational system) and cultural conditions for a greater impact.     

Memories of the dictatorship in Spain. An analysis of the narratives from three generations / Memorias de la dictadura en España. Un análisis de las narrativas de tres generaciones

Abstract

This study will investigate the narratives related by the members of three different generations within two different families on their memories of the Franco dictatorship. The first generation lived through Francoism, the second the democratic transition, and the third were born in a democratic country. Based on a social and discursive conception of memory and identity, this study is carried out using semi-structured interviews as a data collection tool, which we then thematically analyse, together with aspects of the participants’ positions and voices. The interviews are connected according to the factors of generation and family, and we analyse the similarities and differences. This is how the influence of both is seen in each individual’s memories and identities, in addition to how their political ideology is configured.     

On the transfer of spatial learning between geometrically different shaped environments in the terrestrial toad,Rhinella arenarum

Animal Cognition - When trained in a rectangular arena, some research has suggested that rats are guided by local features rather than overall boundary geometry. We explored this hypothesis using...