Oddly Wired
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motivation

One small slip leads you to abandon everything.

The belief that a goal requires perfect execution turns a minor lapse into a total failure.

Instead of viewing a setback as a single incident, people often internalize it as a total lack of willpower. This leads to a cascade of further lapses as they feel the original rule no longer applies to them.

You sabotage your own progress by demanding perfection.

Where this comes from

Study
Marlatt (1985)
What the check found
The claim accurately describes the 'Abstinence Violation Effect' coined by G. Alan Marlatt in 1985. The provided reference material is irrelevant and features a different person by the same surname.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.