A researcher thinks that a person's mood has an effect on how ...

[ts19998]

A researcher thinks that a person's mood has an effect on how helpful that person is likely to be.
 
  To test this, the researcher has some research participants come to the laboratory where they are first given a difficult test and then either heavily praised or strongly criticized for their test performance. Afterward, participants are asked to help the researcher's assistant move some heavy boxes into another room. The researcher makes careful note of how many and which participants help with moving the boxes. In this example, the hypothesis is ________. a) a person's mood has an effect on how helpful that person is likely to be
  b) praise will improve the mood of research subjects and criticism will worsen their mood
  c) helping the researcher's assistant will change a participant's mood
  d) some participants will be in a better mood than others

Question 2

In an experiment, researchers wanted to know whether changing the level of lighting in a factory would have an effect on the productivity of employees.
 
  In order to address this question, employees were randomly assigned to three separate identical work areas, but the lighting was set at a different level in each of the work areas. Then, employees in all three work groups began to operate machinery that produced small electrical components. The number of components produced by each group was carefully tallied at the end of each 8-hour shift. In this example, the hypothesis is the ________. a) presence or absence of the researchers will affect productivity
  b) number of components produced will not change because of lighting
  c) level of lighting will affect employee productivity
  d) employees chosen to participate in the research will affect productivity

[peilian]

Answer to Question 1

a

Answer to Question 2

c