In the mammalian CNS, neural repair may be difficult because:
a. The adult nervous system makes too much of the chemical for growth, so the cell does not "know" in which direction to grow
b. Scar tissue may block the original pathway
c. The immune cells necessary for protection of the neuron during growth are no longer in the vicinity
d. Glial cells are absent
B
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The relationship between TV viewing and aggressive behavior might be influenced by poor social adjustment. Social adjustment here is regarded as a(n) ____ problem
a. restricted range b. shrinkage c. third variable d. lack of linearity
A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores. The hypothesis test produces a z-score of z = 2.27 . If the researcher is using a one-tailed test, what is the correct statistical decision?
a. Reject the null hypothesis with ? = .05 but not with ? = .01. b. Reject the null hypothesis with either ? = .05 or ? = .01. c. Fail to reject the null hypothesis with either ? = .05 or ? = .01. d. Cannot answer without additional information
Your textbook discusses research about the relationship between depression and performance on tasks involving the phonological loop. This research showed that
a. people with depression performed significantly worse than people without depression. b. people with depression actually performed significantly better than people with depression. c. there was no difference in the performance of the two groups, once the researchers corrected for the fact that the depressed group had lower vocabulary skills. d. people with depression tended to transform the stimuli into visual patterns that activated the visuospatial sketchpad
Billy Bob is a participant in a study investigating the effectiveness of Ritalin in treating ADHD. Billy Bob has ADHD, but is in a group that received sugar pills instead of Ritalin. Billy Bob is in the __________ group
a) experimental b) random c) control d) observational