When a researcher moves from a 95% confidence level to a 90% confidence level, the confidence interval for the mean becomes ______.
a. wider
b. normally distributed
c. statistically significant
d. narrower
d. narrower
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You decide to conduct the analytical comparison of Induction vs. Power assertion. Which of the following is the appropriate critical value for this analytical comparison?
One part of raising children is having to discipline them. Hoffman (1963) described three common discipline methods used by parents: power assertion (use of punishment, force, taking away of privileges or possessions), love withdrawal (ignoring or refusing to speak to the child, explicitly stating a dislike for the child), and induction (reasoning with the child, communicating standards of behavior). Barnett, Quackenbush, and Sinisi (1996) noted that little attention had been given to children’s preferences for these different methods. From reviewing the literature, they hypothesized children express a greater preference for induction than power assertion, which in turn is preferred over love withdrawal.
They collected data from a sample of middle school students. Each student watched a videotape of a parent disciplining a child using one of the three forms of discipline. After viewing the videotape, each student rated the effectiveness of the discipline on a 1 to 5 scale, where 1 = “Not at all effective” and 5 = “Very effective”. The results of their analyses are presented below:
a. 3.37
b. 3.40
c. 3.63
d. 4.49
From Piaget's perspective, why might it be wise to postpone the teaching of complex fractions until middle school or high school?
a. Younger students haven't attained conservation. b. Younger students cannot learn complex equations. c. Younger students haven't attained proportional reasoning. d. Younger students don't know their math facts well enough.
Do recent technological advances (e.g., the World Wide Web, electronic databases) assure that future research will be of higher quality, or of greater utility, than past research? Support your answer
What will be an ideal response?
Research studies have shown that early childhood intervention for social skills instruction for children at risk for intellectual and developmental disabilities
a. can lead to counterproductive changes in the child's development. b. can lead to modest but meaningful changes in the child's development. c. can lead to dramatic positive changes in the child's development. d. do not lead to changes in the child's development.