Explain the role of melatonin in sleep regulation in older adolescents.
What will be an ideal response?
Older adolescents are more sleepy during the day than younger adolescents. This finding is not attributed to academic work or social pressures. Rather, research suggests that adolescents' biological clocks undergo a shift as they get older, delaying their period of wakefulness by about one hour. A delay in the nightly release of the sleep-inducing hormone melatonin, which is produced in the brain's pineal gland, seems to underlie this shift. Melatonin is secreted at about 9:30 p.m. in younger adolescents and approximately an hour later in older adolescents.
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Ms. Collins used tests to select the most qualified people she could find to hire. She did not attend to the race or gender of the applicants. Ms. Collins' technique is known as
a. employment bias. b. qualified individualism. c. unqualified individualism. d. test bias.
For the expected frequencies in a chi-square test for independence, the proportions for any row are the same as the proportions in every other row
Indicate whether the statement is true or false
In this calculation, 
what does the 
stand for?
A. The 
stands for the mean population in the sample.
B. The 
stands for the mean distribution in the sample.
C. The 
stands for the number of scores in the sample.
D. The 
stands for the sum of squares in the sample.
Bobbie Jo appeared to develop normally for the first year of her life, but then she began to exhibit severe isolation and communication difficulties as well as repetitive behaviors. Her head size, however, was normal. The most likely diagnosis would be ____
a. autism spectrum disorder b. Asperger's syndrome c. intellectual disability d. learning disability