1a) In a study on learning, more rats in the experimental condtion die unexpecte

Question

1a) In a study on learning, more rats in the experimental condtion die unexpectedly than in the control condition. This result could negatively affect the study because of

a) regression toward the mean

b) testing threat

c) attrition

d) maturation threat (was wrong answer)

1b) A developmental psychologist examined the increase in vocabulary of children from ages 3 to 4 years. All of the children attended a day care that ensured Sesame Street was on a TV in the play room for at least two hours per day. The researchers found that the number of words the kids recognized increased significantly over the study period. Which of the following threats to internal validity would the study most likely experience?

a) floor effect

b) testing threat

c) regression to the mean (was wrong answer)

d) maturation threat

1b) A developmental psychologist examined the increase in vocabulary of children from ages 3 to 4 years. All of the children attended a day care that ensured Sesame Street was on a TV in the play room for at least two hours per day. The researchers found that the number of words the kids recognized increased significantly over the study period. Which of the following threats to internal validity would the study most likely experience?

a) floor effect

b) testing threat

c) regression to the mean (was wrong answer)

d) maturation threat

Explanation / Answer

Ans:

1a)attrition

c is the correct option.

1b) Maturation threat

d is correct option.

Maturation:Were changes in the dependent variable due to normal developmental processes operating within the subject as a function of time?

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