Measurement and Methodology (GRE (Graduate Record Examinations) Psychology): Questions 12  16 of 92
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Question number: 12
» Measurement and Methodology » Statistical Procedures
Question
Statistics are used in psychological research to ________.
Choices
Choice (5)  Response  

a.  Prove that the research hypothesis is correct. 

b.  Evaluate the likelihood that the experiment caused the differences in behavior across treatment conditions. 

c.  Justify the experimenter’s conclusions. 

d.  Quantify the dependent variable. 

e.  Prove the null hypothesis. 

Question number: 13
» Measurement and Methodology » Psychometrics, Test Construction, Reliability, Validity
Question
A behavioral observation checklist requires the observer to note whether the person being observed smiles. A key source of error variance resulting from this requirement is
Choices
Choice (5)  Response  

a.  all of the above. 

b.  content variance. 

c.  item sampling variance. 

d.  scoring variance. 

e.  None of the above 

Question number: 14
» Measurement and Methodology » Statistical Procedures
Question
The amount of variance in scores accounted for by a correlation coefficient of . 70 is
Choices
Choice (5)  Response  

a.  almost 50 % if the reliability of the measures is + 1.00 

b.  indeterminate because the correlation is negative 

c.  less than zero because the correlation is negative 

d.  70 % if the reliability of the measures is + 1.00 

e.  14 % if the reliability of the measures is greater than. 70 

Question number: 15
» Measurement and Methodology » Statistical Procedures
Question
An IQ of 146 is approximately how many standard deviations from the mean?
Choices
Choice (5)  Response  

a.  4 

b.  1 

c.  2 

d.  5 

e.  3 

Question number: 16
» Measurement and Methodology » Statistical Procedures
Question
In a normal frequency distribution, 32 % of the cases
Choices
Choice (5)  Response  

a.  fall beyond 1 standard deviation above and 1 standard deviation below the mean 

b.  fall beyond 2 standard deviations above and 2 standard deviations below the mean 

c.  fall between the mode and the median 

d.  determine whether the distribution is leptokurtic 

e.  fall between 1 standard deviation above and 1 standard deviation below the mean 
