Practice Makes Transfer Imperfect: Evidence From Auditory Learning.

Area of Science:

• Auditory perception and learning
• Neuroscience of skill acquisition
• Psychoacoustics

Background:

• Motor and visual studies indicate reduced generalization with prolonged training.
• This reduction is linked to shifts in neuronal representations.
• Auditory studies have shown mixed results regarding training duration and generalization.

Purpose of the Study:

• To investigate how extended training in a basic auditory task affects generalization of learning.
• To determine if prolonged training in psychoacoustics leads to decreased generalization.

Main Methods:

• Two experiments involving 82 young adults using a difference limen for frequency (DLF) task.
• Training involved either a single or nine sessions with an adaptive forced-choice procedure.
• Generalization was assessed by testing performance on the untrained ear and an untrained frequency.

Main Results:

• Significant learning (reduced DLF thresholds) was observed after both single and nine training sessions.
• Extended DLF training limited the generalization of learning gains to untrained ears and frequencies.
• Greater performance improvements in the trained condition correlated with reduced generalization.

Conclusions:

• Increased specificity of auditory skill learning with prolonged training.
• Findings support the idea of gradual neural representation changes during auditory task acquisition.
• Suggests common mechanisms for basic skill learning across sensory modalities.