How long does an ultradian cycle typically last?
A. about 24 hours
B. 90-120 minutes
C. half a year
D. 28 days
Answer: B
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Suppose that you are listening to a lecture by a speaker who supports the critical period hypothesis for a particular motor skill in children. The speaker is likely to say that
a. the ability to acquire this skill increases gradually over time. b. the ability to acquire this skill shows an abrupt increase during development. c. children will show a gradual decline in acquiring the skill competently, as the age of acquisition increases. d. children will show an abrupt drop in acquiring the skill competently, as the age of acquisition increases.
For the F ratio, the between groups variance term will be calculated with the sum of squared differences between the ______ and ______, multiplied by the number of subjects.
A. p value; z score B. F distribution; z scores C. condition means; grand mean D. z score; grand mean
When Allison was completing her medical forms in the doctor's office, she was asked to indicate her race. What may be an appropriate reason(s) for the question on the forms?
a) to establish her skin color b) to establish her ethnic/cultural heritage c) to establish her religion d) to establish biological factors
A bias that may operate in research when people are allowed to determine whether or not they will receive a treatment is called a
A) volunteer bias. B) treatment bias. C) selection factor. D) experimenter bias.