Effects of task difficulty on EEG measures of cerebral engagement

  title={Effects of task difficulty on EEG measures of cerebral engagement},
  author={David Galin and Jack Johnstone and Jeannine Herron},
EEGs were recorded while subjects constructed 14 block designs of graded complexity, and also while reading and writing. Two measures of design difficulty were used: time to complete each construction and Ss’ subjective ranking. For each task, average alpha power for each lead and R/L ratios (C&Z,, P,/P$) were calculated. Within-subject and group analyses both showed higher alpha power and higher R/L ratios with increasing difficulty. There were important differences between subjects: some… CONTINUE READING

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