Parameters of Eyes-Closed Alpha Enhancement.

The performance of subjects (Ss) receiving contingent feedback in an eyes-closed alpha enhancement setting was contrasted with changes in alpha of Ss receiving random feedback and no feedback. In addition, comparisons were made between: 1) binary and continuous feedback signals; 2) integrated and criterion alpha as dependent variables; and 3) eyes-open and eyes-closed alpha enhancement tasks. It was found that: 1) Increases in emitted occipital alpha under eyes-closed conditions are related to contingent reinforcement. 2) Proportional feedback was most efficient in the rapid development of eyes-closed training. 3) Larger changes in alpha were seen during eyes-open than during eyes-closed training. 4) Binary feedback appeared to be more efficient in increasing eyes-open alpha response. 5) No relationships between the ability to perform the eyes-open and eyes-closed alpha enhancement tasks were found within Ss. [ABSTRACT FROM AUTHOR]