A researcher directly controls for the probability of a ______, but does not directly control for the probability of a ______.
A. Type I error; alpha level
B. Type II error; beta level
C. Type I error; Type II error
D. Type II error; Type I error
Ans: C
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When Harry forgets to wear his mittens outdoors, the caregiver uses a cool down time to get him to think about the importance of dressing appropriately. This was an appropriate use of cool down time
Indicate whether the statement is true or false.
A researcher was investigating the effects of incentives on problem solving performance with children. Two randomly selected groups of children were required to work on a variety of problems. One group served as a control group. The other group was given an incentive to solve problems. They were told that for each problem solved they would receive points that they could trade in for special treats. The mean number of problems solved by the control group was 12.6 with a standard deviation of 2.6. The mean number of problems solved by the incentive group was 12.6 with a standard deviation of 6.4. The researcher's assistant was surprised that the incentive had no effect on problem solving performance. The researcher, however, explained that in fact the incentive did affect performance. How
did the incentive affect the children's performance? What will be an ideal response?
One easy way to choose a sample from a population is ______.
A. to provide logic to the process B. ongoing C. definitive in nature D. by using computer software
When attempting to change a child behavior, withholding privileges is
A) a technique that works at times. B) used after rule statements have failed. C) not very effective. D) a rather cruel punishment. E) All of these answers are correct.