College students with difficulty falling asleep were
treated with either pro ressive relaxation, systeiatic
desensitIzatioh, or 'a th ught .control procedure. All three, treatment
groups showed sighificant lower latency to sleep otset times than a
waiting-list control -group at the end of the three-week treatment
period. A.three-week followup,reVealed that All- three treatment
groups' maintained their improvement. The success'of the progressive
relaxation and the systematid'desensitizatiop procedures corroborates
earlier evidencewhile the success of the thought control procedure
suggests' that there may be a cognitive element contributing to
pre-dormitional insomnia,