A sleep therapist wanted to see if a herbal tea advertised as a sleep aid really worked.
Question:
A sleep therapist wanted to see if a herbal tea advertised as a sleep aid really worked. He located 46 people with sleep problems and matched them into pairs on the basis of
(a) How long they had suffered from insomnia,
(b) How long it usually took them to go to sleep at night,
(c) How much sleep onset anxiety they experienced, and
(d) How suggestible they were. He then randomly assigned one person from each pair to drink the tea at bedtime (the experimental group), while the control group went to sleep as hey normally did. He used an EEG to measure the minutes to sleep onset (the fewer the minutes to sleep onset, the better). He found MC = 21.20, ME = 19.70, sD = 5.47, sMD = 1.14, t = 1.32, and 95% CIμDiff = from −3.86 to 0.86. Write a four-point interpretation.
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