“…A relatively neglected but potentially important variable affecting marital interaction and satisfaction is circadian rhythms (Adams & Cromwell, 1978;Constantine, 1986;Cromwell, Keeney, & Adams, 1976;Darnley, 1981;Darnley, 1978;Hoskins, 1982;Hoskins & Halberg, 1983;Hoskins, Halberg, Merrifield, & Hillman, 1979;Kantor & Lehr, 1975;Keeney & Cromwell, 1979;Perry & Dawson, 1988). "Circadian rhythm" is a term derived from two Latin words, "circa" and ((dia," which in combination mean ('about a day" (Ward, 1971).…”