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Transcranial direct current stimulation improves novel word recall in healthy adults
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Fickle fricatives: Fricative and stop perception in Gurindji Kriol, Roper Kriol, and Standard Australian English
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Children's judgements of facial hair are influenced by biological development and experience
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Stereotypic and complex phrase types provide structural evidence for a multi-message display in humpback whales (Megaptera novaeangliae)
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Category-length and category-strength effects using images of scenes
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The communication space of humpback whale social sounds in wind-dominated noise
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The challenges of geographical inclusive education in rural Bangladesh
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Assessing the accuracy of perceptions of intelligence based on heritable facial features
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Repetition blindness in priming in perceptual identification: Competitive effects of a word intervening between prime and target
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Right away: A late, right-lateralized category effect complements an early, left-lateralized category effect in visual search
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Deconstructing the simplification of jury instructions: how simplifying the features of complexity affects jurors' application of instructions
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The devil is in the detail: Quantifying vocal variation in a complex, multi-levelled, and rapidly evolving display
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Abstract:
Identifying and quantifying variation in vocalizations is fundamental to advancing our understanding of processes such as speciation, sexual selection, and cultural evolution. The song of the humpback whale (Megaptera novaeangliae) presents an extreme example of complexity and cultural evolution. It is a long, hierarchically structured vocal display that undergoes constant evolutionary change. Obtaining robust metrics to quantify song variation at multiple scales (from a sound through to population variation across the seascape) is a substantial challenge. Here, the authors present a method to quantify song similarity at multiple levels within the hierarchy. To incorporate the complexity of these multiple levels, the calculation of similarity is weighted by measurements of sound units (lower levels within the display) to bridge the gap in information between upper and lower levels. Results demonstrate that the inclusion of weighting provides a more realistic and robust representation of song similarity at multiple levels within the display. This method permits robust quantification of cultural patterns and processes that will also contribute to the conservation management of endangered humpback whale populations, and is applicable to any hierarchically structured signal sequence.
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Keyword:
1201 Arts and Humanities (miscellaneous); 3102 Acoustics and Ultrasonics; Dialects; Exchange; Geographic-Variation; Humpback Whale Song; Information; Megaptera-Novaeangliae; Ocean-Basin Scale; Repertoire; Sequences; Vocalizations
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URL: https://espace.library.uq.edu.au/view/UQ:717634
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Examining non-syndromic autosomal recessive intellectual disability (NS-ARID) genes for an enriched association with intelligence differences
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Linking extreme response style to response processes: a cross-cultural mixed methods approach
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Participation in communication activities following traumatic brain injury: a time use diary study
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A diffusion model approach to analysing the bilingual advantage for the Flanker task: the role of attentional control processes
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Executive functioning in schizophrenia: Unique and shared variance with measures of fluid intelligence
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No relationship between intelligence and facial attractiveness in a large, genetically informative sample
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