ERIC Number: ED358947
Record Type: Non-Journal
Publication Date: 1993-Mar
Reference Count: N/A
Brain Electrical Activity Changes and Cognitive Development.
Hartley, Deborah; Thomas, David G.
This study investigated the relationship of cognitive developmental changes to physiological and anatomical changes by measuring both types of data within the same subjects. Cortical electrical activity was measured in 24 males between 10 and 12 years of age. Event-related potentials (ERPs) were recorded from midline scalp electrodes during a visual task in which two different stimuli were presented sequentially. Half of the subjects in each age group were at Level 6 of Fischer's skill hierarchy; the other half were at Level 7. Advancement from Level 6 to 7 involves the acquisition of the ability to derive a single abstract concept from the comparison of two concrete instances of that concept. IQ was also measured for each subject. Results showed that the amplitude of P300 was significantly greater for boys in Level 7 compared to Level 6. P300 latency changed significantly as a function of age, but the change was not linear. Trial-to-trial variability of the ERP decreased from Level 6 to Level 7; however, this effect was only marginally significant. In general, results showed clear evidence that the physiological measures of P300 amplitude, P300 latency, and trial-to-trial variability correspond to developmental changes. (Author/MM)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A