Optional Listening Control
Auditory Laterality
Right-ear advantage is a repeated finding in specialized competing-speech tasks. Logos treats that history as inspiration for an optional control, not a learning claim.
Controlled evidence
Safe public wording
Research often finds a right-ear advantage in competing-speech experiments. Logos turns that idea into an optional listening control, not a guaranteed learning result.
Boundary
What this does not prove
The strongest evidence comes from dichotic-listening speech tasks. It does not validate a fixed music balance, a natural 70/30 brain ratio, focus gains, memory gains, grades, or learning speed.
How Logos can use this
Use right-ear balance only as a reversible user setting or experiment. Measure preference, completion, and voluntary return rather than cognitive outcomes.
Do not claim
- A universal 70/30 listening ratio
- Right-weighted music as a validated learning prescription
- Claims that the setting improves grades, memory, focus, or language ability
Public citations
Sources behind the boundary.
These links support the evidence classification and limitation language. They do not create an app-level efficacy claim.
Speech processing asymmetry revealed by dichotic listening and functional brain imaging
Neuropsychologia, 2016
Review-level context for speech laterality and right-ear advantage.
A primer on dichotic listening as a paradigm for assessment of hemispheric asymmetry
Laterality, 2019
Explains the task design and interpretation limits of dichotic listening.
Top-down modulation of dichotic listening affects interhemispheric connectivity
Frontiers in Neuroscience, 2024
Shows that attention and task direction can change ear-report patterns.
Dichotic turncoats: Lateralization of melodies and syllables
PLOS ONE, 2025
Supports the boundary that speech findings do not automatically transfer to music.
Evidence boundary last reviewed: 2026-06-09.