Reflect on the Are You Equipped Now at the end of the chapter. The article indicated that about 11 of the participants had already received acupuncture in the year before the treatment.
This fact is associated with which of the following threats to internal validity?
a. selection
b. maturation
c. regression to the mean
d. attrition
When scores fall primarily at the lower end of a response option, a study is exhibiting a floor effect.
Indicate whether the statement is true or false
Kathy wants to know if using video examples in her classes will help to improve student learning.
Kathy decides to show students in one section of her General Psychology class videos to supplement the material and students in the other section of her General Psychology class are not shown videos. Kathy then compares tests scores between the two classes to see if the videos increased student learning. However, before making the comparison, Kathy decides not to use scores from students who are repeating the course. What disadvantage of a between subjects design does Kathy avoid by not including students who are repeating the course?
a. practice effects
b. order effects
c. carry over effects
d. all of the above
Sampling procedures with replacement are preferred to sampling procedures without replacement.
Indicate whether the statement is true or false
The null hypothesis states that there is no difference between scores on dependent variables.
Indicate whether the statement is true or false
Quick Reply
