FILE: ARCH-LIB-007 / STATUS: PUBLISHED
THE RESEARCH LIBRARY / THE STACKS
A big change in intention made a smaller change in behavior
Read what 47 experiments found about meaning to change. Then look at the moment where your plan slips.
In 47 experiments, a big change in intention made a smaller change in behavior.
THE SOURCE
Webb and Sheeran (2006). Does changing behavioral intentions engender behavior change? A meta-analysis of the experimental evidence.. Psychological Bulletin.
We read the abstract. Open the paper
HOW STRONG THE EVIDENCE IS
STRONG. A meta-analysis, which pools results from many studies. It used only experiments where people were placed in groups at random.
“a medium-to-large change in intention (d = 0.66) leads to a small-to-medium change in behavior (d = 0.36)”
Meaning to change is not changing yet. This review measured how far apart the two can be.
The Research Library reads one paper at a time and says what it found in plain words. For this note we read the abstract, not the full paper.
What the research found
Many theories assume that what you intend drives what you do. Most tests of that idea only look at links, which cannot show cause.
So this review gathered 47 experiments. In each one, some people were helped to form a stronger intention and others were not.
The change in intention was medium to large. The change in behavior that followed was small to medium. In the paper's own units, those were 0.66 and 0.36.
How strong the evidence is
This is one of the stronger kinds of evidence. It pools many experiments, not one study or a set of surveys.
The review also found that the size of the gap depended on several features of each study. The abstract does not list them all.
What it means for catching a pattern
The Perfectionism Trap is the pattern of not finishing what is not perfect. You may mean to finish every single week, and still stall at the same point.
This review suggests that gap is normal. A stronger intention helps, but less than people expect.
So the work moves from the plan to the moment the plan slips. Notice what you feel just before you stop.
The canon names that first move Catch: feel the body signal and name the pattern before it becomes the behavior. The body signal is what you feel in your body as the pattern starts.
What it does not show
This review did not test The Archivist Method. It studied intentions and behavior in general, not any one pattern.
It does not say intentions are useless. It says a change in intention is usually bigger than the change in behavior.
The free Crash Course, short lessons on your pattern, starts by naming it.
HOW TO CITE THIS PAGE
The Archivist Method (2026). A big change in intention made a smaller change in behavior. The Research Library. https://thearchivistmethod.com/research/the-gap-between-meaning-to-and-doing