Format

Send to

Choose Destination
Am J Public Health. 1999 Aug;89(8):1175-80.

The right answer for the wrong question: consequences of type III error for public health research.

Author information

1
Joseph L. Mailman School of Public Health, Columbia University, New York, NY 10032, USA. sbs5@columbia.edu

Abstract

OBJECTIVES:

This study examined the impact of assessing the causes of interindividual variation within a population when the research question of interest is about causes of differences between populations or time periods. This discrepancy between the research focus and the research question is referred to as a type III error, one that provides the right answer for the wrong question.

METHODS:

Homelessness, obesity, and infant mortality were used to illustrate different consequences of type III errors. These different consequences depend on the relationships between the causes of within- and between-group variation.

CONCLUSIONS:

The causes of inter-individual variation and the causes of variation between populations and time periods may be distinct. The problem of examining invariant causes deserves attention.

PMID:
10432902
PMCID:
PMC1508697
DOI:
10.2105/ajph.89.8.1175
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Atypon Icon for PubMed Central
Loading ...
Support Center