Externaly valid study
1. in the testing the effect of the noise on performance of a task ,Ernie tests half of the participants in acool ,comfortable,quiet room and the other half in a hot ,noisy room ,Ernie’s failure to control for temperature of the room may result in a (n)
A)Externaly valid study
B)internaly valid study
2.An investigator wants to see whether packaging information affects the way people rate breakfast cereal.The same cereal is put in three packages :a) brown box that says ,”To start your day off with a smile ” b) a yellow box that says ,”for extra energy all day ” and c) a while box that says ,” Fortified with B complex and iron .”in this study the
A)Kind of cereal is confounded with color of the box
B)package information is confounded with color of the box
C)package information is confounded with kind of cereal
D)package information is confounded with color blindness
3..An experiment can be assumed to have internal validity if
A)The dependent variable is valid
B.THERE is a strong manipulation of the independnt variable
C.the experimeter employed random assign ment and experimental control
D.confounds are present
4.one problem with the preset post test design is that
A.Participants cannot be randomly assigned to groups
B.the preset may sensetise participants to the true purpose of he experiment
C.presest confuse participants
D.none of these
5.At the end of a three year study ,Susan finds that 12 percent of her participants did not take part in the final survey because they moved away .in research terms,susan is experiencing a ———problem.
6.In a ——design ,half of the participants receive only a post test and the other half receive both a presest and a posttest.
B.One -group pretest-posttest
D.two-group pretest -posttest
7.Random assignment of half of teh participants to group one and the other half to group two.
A.Prevents any systematic bias
B.Minimizes any difference due to the participants characteristics
C.Increases the chances that any differences between group one and two is due to the manipulation
D.all of these
8.which one of the following is NOT a type of order effect?
9.Martin states that in his experiments ,he has counter balanced his conditions.What does this mean?
A.He has an equal numbe of participants in all conditions
B.All participants are exposed to all conditions
c.All possible orders of presentation of conditions are presented
D.Conditions are presented in a fixed order
10.in the early stages of the research project, the researcher would want as——as possible in order to demonstrate that a relationship between variable exists.
B.weak of a manipulation
C.strong of a manipulation
D.costly of a manipulation
11.A researcher who measures the speed of helping in an emergency is using a _______a measure.
12.A placebo group
A.Receives in inert subtances
B. CONTROLS FOR CERTAIN ALTERNATIVES EXPLANATIONS
C.both a and b
D.neither a or b.
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