Pupil dilation as a measure of processing load in simultaneous interpretation and other language tasks

Area of Science:

• Cognitive Psychology
• Psycholinguistics
• Neuroscience

Background:

• Simultaneous interpretation involves significant cognitive processing load.
• Measuring this processing load in real-time is crucial for understanding cognitive effort.
• Pupillary response has been explored as a potential non-invasive indicator of cognitive load.

Purpose of the Study:

• To investigate the utility of pupillary response in assessing processing load variations during simultaneous interpretation.
• To compare processing load across different language tasks using pupil size as a metric.
• To determine if pupil dilation reflects momentary changes in cognitive effort during lexical translation.

Main Methods:

• Experiment 1: Compared pupil size during simultaneous interpretation, listening, and repeating tasks.
• Experiment 2: Used single words to replicate task effects and examine momentary processing load variations.
• Measured average pupil size and pupil dilation in response to stimuli.

Main Results:

• Significant differences in pupil size were observed between simultaneous interpretation and other language tasks.
• Momentary variations in processing load during lexical translation correlated with pupil size changes.
• More difficult words to translate induced greater pupil dilation.
• Repeating words in a non-native language resulted in increased pupil dilation compared to native language repetition.

Conclusions:

• The pupillary response serves as a valid indicator of processing load in language tasks.
• Pupil size variations can effectively track cognitive effort during simultaneous interpretation and lexical translation.
• This methodology offers a promising avenue for real-time cognitive load assessment in psycholinguistics.