When comparing two categorical variables, one should often use a _________.
a. Histogram
b. Scatter plot
c. Clustered Barplot
d. Boxplot
c. Clustered Barplot
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If the independent variable in an experiment had an effect this would contribute to _____ variance in the F-ratio
a. total b. between-groups c. within-groups d. error
Environmental hazards that act as teratogens include chemicals and pollutants present in all of the following EXCEPT
a. artificial sweeteners. b. cosmetic products. c. fruit juice. d. food additives.
In their landmark research in the 1970s, Klaus and Kennell found that extended contact between mothers and their babies shortly after birth:
a. was unimportant to parent-infant bonding. b. resulted in differences in mother-infant interactions two years later. c. was related to social and cognitive differences in the children at age 5. d. was important for boy infants but unimportant for girl infants.
Training infants with letter and number flash cards, as well as educational tablet applications, __________
A) yields smarter “superbabies” who are ready for the challenge of formal education B) increases the size of the prefrontal cortex, which governs complex cognition C) increases the brain’s capacity for impulse control and stress management D) can cause them to withdraw, thereby creating conditions much like stimulus deprivation