Format

Send to

Choose Destination
Health Psychol. 2008 Mar;27(2):179-84. doi: 10.1037/0278-6133.27.2.179.

Asking questions changes behavior: mere measurement effects on frequency of blood donation.

Author information

1
Faculty of Nursing, Laval University, Quebec, Canada. gaston.godin@fsi.ulaval.ca

Abstract

OBJECTIVE:

This research examined the impact of completing a questionnaire about blood donation on subsequent donation behavior among a large sample of experienced blood donors.

DESIGN:

Participants (N=4672) were randomly assigned to an experimental condition that received a postal questionnaire measuring cognitions about donation or a control condition that did not receive a questionnaire.

MAIN OUTCOME MEASURES:

Number of registrations at blood drives and number of successful blood donations were assessed using objective records both 6 months and 12 months later.

RESULTS:

Findings indicated that, compared to control participants, the mean frequency of number of registrations at blood drives among participants in the experimental group was 8.6% greater at 6 months (p<.0.007), and was 6.4% greater at 12 months (p<.035). Significant effects were also observed for successful blood donations at 6 months (p<.001) and 12 months (p<.004).

CONCLUSION:

These findings provide the first evidence that the mere measurement is relevant to promoting consequential health behaviors. Implications of the research for intervention evaluation are discussed.

PMID:
18377136
DOI:
10.1037/0278-6133.27.2.179
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Psychological Association
Loading ...
Support Center