The variable selected and manipulated systematically in an experiment is called the______ variable
a. dependent
b. systematic
c. independent
d. control
c
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By the age of ____, the brain has reached 90% of its adult size
a. 6 months b. 1 year c. 2 years d. 5 years
Which word is most likely to be among an English-speaking toddler’s first 50 words?
A) ball B) table C) vase D) lamp
Which of the following statements best describes the long-term effects of large-scale early intervention programs such as Project Head Start?
a. Gains in IQ and academic achievement carry through middle school, high school, and college. b. Gains in IQ and academic achievement carry through elementary school but steeply decline as a child enters middle school. c. Gains in IQ and academic achievement are short-lived and generally fade within 2 to 3 years after entering school. d. There have been no studies conducted on the long-term effects of early intervention programs such as Project Head Start.
The rationale for using animals in research is based on the assumption that
a. the ethical requirements are more lenient for research involving animals as compared to humans. b. human participant research is more expensive than animal research. c. research involving animals produces more valid results than research involving humans. d. there are biological continuities between humans and animals.