Which example illustrates telegraphic speech?
A) over the river and through the woods
B) go up and down
C) daddy drives car
D) turn left and then right
C) daddy drives car
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Why would the cortex of highly intelligent children show a later thinning by the age of 19?
A. The whole brain shrinks in size, not just the cortex, to allow new connections to form. B. Given that there is limited space within the skull, the thinning allows for growth in other areas of the brain, such as the medulla. C. There is less learning at this time of life compared to early childhood, and therefore less need for neural connections. D. Those neural connections that are unused may die off to make the cortex more efficient in its functions.
When we have two independent samples, a confidence limit is generally used to
a. say something about the difference between population means. b. say something about the difference between sample means. c. specify the location of a single sample mean. d. refine the estimate of the variance.
A snack food company is developing a new flavor for crackers and asks customers to text their preference between two possibilities. What kind of sampling is being used?
a. quota b. non-quota c. probability d. nonprobability
Glutamate can be toxic to neurons because
a. NMDA receptors allow calcium into a cell, and excess calcium can stimulate harmful levels of enzyme activity. b. NMDA receptors block the movement of calcium into a cell, preventing the release of other neurotransmitters. c. it blocks receptors for other types of neurotransmitters, preventing effective communication between cells. d. its breakdown in the synaptic gap produces harmful free radicals.