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Robot speech: how variability matters for child-robot interactions.

Adriana Hanulíková1, Nils Frederik Tolksdorf1, Sarah Kapp1

  • 1Smart Cognition Lab, Institute for German as Foreign Philology, Heidelberg University, Heidelberg, Germany.

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Synthetic speech for robots lacks human-like variability, crucial for child development. Research explores how speech variation impacts children

Keywords:
child-robot interactionsrobot speechrobot varietyrobot voicerobot-directed speechspeaking stylespeech variationvariability

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Area of Science:

  • Human-Computer Interaction
  • Developmental Psychology
  • Robotics

Background:

  • Spoken language is vital for human learning and social interaction.
  • Synthetic speech in robots often lacks the natural variability found in human speech.
  • Child-robot interaction research has historically prioritized robot appearance over vocal design.

Purpose of the Study:

  • Examine the role and impact of speech variability in child-robot interactions.
  • Investigate how human speech variability affects robot adaptation and vice versa.
  • Address the challenges and ethical considerations of implementing speech variability in robots for children.

Main Methods:

  • Discussed three key tensions: feasibility, desirability, and ethics of speech variability.
  • Reviewed existing research on synthetic speech and child-robot interaction.
  • Proposed an interdisciplinary approach to studying speech variability.

Main Results:

  • Implementing dynamic speech variability in robots is technically challenging.
  • Speech variability can have both positive and negative effects on learning, usability, and trust.
  • Ethical considerations include potential deception versus transparency in robot speech.

Conclusions:

  • Speech variability should be treated as a design tool in child-robot interaction.
  • Transparency regarding the robot's role and capabilities is essential.
  • Further research is needed to understand how specific variations benefit children's socio-cognitive and language development.