Chapter 10

A researcher compares the difference in the amount of texting by students in class during the first week and last week of classes. The type of design describe here is called a

A repeated-measure design

A researcher asked a sample of brothers and sisters to rate how positive their family environment was during childhood. In the study, the differences in rating between each brother and sister pair were compared. The type of design described here is called a

B matched-samples design

A researcher tests how well participants know their spouse while under hypnosis, and again without hypnosis. It was hypothesized that participant responses would be more accurate (greater number of correct responses) when under hypnosis. The mean number of correct responses was M = 5.30 under hypnosis and M = 3.40 without hypnosis in a sample of 30 participants. If the estimated standard error for difference scores was 2.52, then what is the decision at a .05 level of significance (two-tailed test)?

B retain the null, hypothesis, responses ere not more accurate under hypnosis

Once difference between a repeated-measure design and a match-samples design is that

B. Only one design involed observing the same participants in each group

Which of the following is an advantage of selecting related sample compare to selecting independent sample in behavior research

D all of these