Method
Two instruments, one word
A coded interview and a questionnaire both report something called attachment. When researchers administered both to the same participants, the overlap was small.
Measurement
How a newspaper questionnaire became a research instrument
The adult attachment literature began with a three-paragraph forced-choice item circulated through a newspaper survey. The scales in use today look nothing like it, and the change was not cosmetic.
Read this articleThe measured span
Adult attachment has been measured since 1987, but the shaded range marks where most published samples sit. Student recruitment concentrates the evidence in early adulthood; the decades to the right are covered by a much smaller literature.
Also in this issue
Longitudinal
What stability looks like when it is measured over decades
Test-retest correlations decline as the interval lengthens and then flatten. Two competing models predict that shape, and measurement error complicates both.
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