Pivik and colleagues (1993) recommend two approaches for determining appropriate frequency bands for developmental population: small band and wide band. For the wide band method, EEG analyses are computed for a wide frequency band that includes all frequencies in which there is evidence of power (e.g., Jones, Field, Fox, Davalos, Lundy, & Hart, 1998). This method, however, is not used as often as the small band method. Researchers using the small band method examine individual spectra and define frequency bands that center around the peaks in the spectrum. This technique has been applied to longitudinal data to reveal that 6–9 Hz is the dominant frequency band during quiet wakefulness from infancy (i.e., 5 or 7 months) through early childhood (i.e., 48 months; Bell & Fox, 1992; Marshall, Bar-Haim, & Fox, 2002). Stroganova and colleagues (e.g., Stroganova, Orekhova, & Posikera, 1999) have identified an overlapping infant frequency band using a narrow frequency bin method in which narrow frequency bins (e.g., 0.4 Hz) are analyzed and frequency bands are determined by significant findings at adjacent bins. Specifically, the 5.2–9.6 Hz band in
