Question 1

A test developed to assess age-related changes in bone density that does not pick up these changes has:

Accepted Answer

A)  low predictive validity. 
B)  low concurrent validity. 
C)  low construct validity. 
D)  None of these is correct. 
A)  low predictive validity. 
B)  low concurrent validity. 
C)  low construct validity. 
D)  None of these is correct.

Question 2

A screening examination was performed on 250 persons for factor X, which is found in disease Y. A definitive diagnosis for disease Y among the 250 persons had been obtained previously. The results are charted here:
  The specificity of this test is expressed as:

Accepted Answer

A)  30%. 
B)  70%. 
C)  56%. 
D)  7%. 
E)  80%. 
A)  30%. 
B)  70%. 
C)  56%. 
D)  7%. 
E)  80%.

Question 3

Validity is the ability of a measuring instrument to give a true measure.

Accepted Answer

A) True 
 B)False

Question 4

It is possible for a measure to be valid but unreliable.

Accepted Answer

A) True 
 B)False

A test developed to assess age-related changes in bone density that does not pick up these changes has:

A screening examination was performed on 250 persons for factor X, which is found in disease Y. A definitive diagnosis for disease Y among the 250 persons had been obtained previously. The results are charted here: The specificity of this test is expressed as:

Validity is the ability of a measuring instrument to give a true measure.

It is possible for a measure to be valid but unreliable.

History and Scope of Epidemiology

Practical Applications of Epidemiology

Measures of Morbidity and Mortality Used in Epidemiology

Descriptive Epidemiology: Person, Place, Time

Sources of Data for Use in Epidemiology

Study Designs: Ecologic, Cross-Sectional, Case-Control

Study Designs: Cohort Studies

Experimental Study Designs

Measures of Effect

Data Interpretation Issues

Epidemiology of Infectious Diseases

Epidemiologic Aspects of Work and the Environment

Molecular and Genetic Epidemiology

Social, Behavioral, and Psychosocial Epidemiology

Epidemiology As a Profession

Epidemiology and Health Policy

Filters

Exam 11: Screening for Disease in the Community

A test developed to assess age-related changes in bone density that does not pick up these changes has:

A screening examination was performed on 250 persons for factor X, which is found in disease Y. A definitive diagnosis for disease Y among the 250 persons had been obtained previously. The results are charted here: The specificity of this test is expressed as:

Validity is the ability of a measuring instrument to give a true measure.

It is possible for a measure to be valid but unreliable.

History and Scope of Epidemiology

Practical Applications of Epidemiology

Measures of Morbidity and Mortality Used in Epidemiology

Descriptive Epidemiology: Person, Place, Time

Sources of Data for Use in Epidemiology

Study Designs: Ecologic, Cross-Sectional, Case-Control

Study Designs: Cohort Studies

Experimental Study Designs

Measures of Effect

Data Interpretation Issues

Epidemiology of Infectious Diseases

Epidemiologic Aspects of Work and the Environment

Molecular and Genetic Epidemiology

Social, Behavioral, and Psychosocial Epidemiology

Epidemiology As a Profession

Epidemiology and Health Policy

Filters