Monaural ear advantages in simple and choice reaction time: artifacts and individual differences

Area of Science:

• Cognitive Psychology
• Auditory Neuroscience
• Human Factors

Background:

• Previous research suggests ear advantages, typically right-sided, for simple reaction time (RT) to monaural tones.
• It remains debated whether these ear advantages extend to choice RT tasks.

Purpose of the Study:

• To investigate the presence and nature of ear advantages in both simple and choice RT tasks.
• To determine if ipsilateral responses are faster than contralateral responses.
• To explore the underlying mechanisms contributing to observed ear advantages.

Main Methods:

• Participants performed simple and choice RT tasks using monaural tones.
• Bimanual responses were recorded to measure latencies for each hand.
• Individual differences in ear advantage were analyzed.

Main Results:

• No significant ear advantages were found for either simple or choice RT.
• Ipsilateral responses were not found to be faster than contralateral responses.
• Significant inter-subject variability in ear advantage was observed.

Conclusions:

• The findings challenge the existence of consistent ear advantages for monaural tones in RT tasks.
• Observed ear advantages are likely attributable to lateral biases and stimulus-response compatibility effects.
• Individual differences in ear advantage may reflect unique cognitive strategies or biases.