The most commonly used formula for computing r is the ______.
A. response rate coefficient
B. analysis of variance coefficient
C. Pearson correlation coefficient
D. studentized range statistic coefficient
Answer: C
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The self-concepts of preschoolers and those in middle childhood differ in that a. preschoolers see themselves as either "good at doing things" or not. b. preschoolers can make judgments about their performance in seven different areas, such as physical abilityand peer relationships
c. in middle childhood, children differentiate only between two facets of self-concept: general competence andsocial acceptance. d. children do not develop a self-concept until age 10.
Which of the following is affected by changes in the intensity of the US but NOT by changes in the intensity of the CS?
a. The speed of acquisition b. The asymptotic level of conditioning c. The movement ratio d. The suppression ratio
A professor wanted to examine the effects of diet on learning. He put some laboratory rats on a starvation diet (Group A) but eliminated only desserts from the diet of a second group (Group B). During the experiment, the professor discovered that he needed more Group B rats, so he caught some in a local alley. The results of the experiment showed that Group B rats were faster at learning a maze, so the professor concluded that diet is related to learning speed. Which of the following statements is the most accurate?
A. The professor's conclusion is correct. B. The professor's conclusion is incorrect because the rats in Group A were on a different diet than the rats in Group B. C. The professor's conclusion is incorrect because the type of rat was a confound. D. The professor has used a double-blind procedure.
Conflict between siblings can become greater when _____
a. parents show favoritism b. there is a greater harmony between the parents c. the siblings have "easy" temperaments d. all of these