Your 18-month-old son has been sleeping through the night for the past two months. You and your spouse were very happy with this new development and were looking forward to many more months of it
But he has started waking up at night again and has been pretty fussy during the day. What is the likely reason that he is waking up now?
a. He has been drinking too much before bedtime.
b. His molars are coming in and he is teething.
c. He has been eating too much.
d. He is going through a growth spurt.
Answer: B
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A colleague informs you that the data you collected in an Internet-based experiment may not
be internally valid. Which strategy would most likely alter this opinion? A) If you could demonstrate that the study participants were demographically similar to people in the community. B) If you could demonstrate the same findings in a smaller, laboratory-based study. C) If you could demonstrate that most people took the same amount of time completing the task over the Internet. D) If you told your colleague that you offered heavy financial compensation for study participation.