Elimination of bedtime thumbsucking in home setting through contingent reading.
Pause the bedtime story the instant thumbsucking starts and resume when it stops—the habit vanishes in under two weeks.
01Research in Context
What this study did
Three girls who sucked their thumbs every night at bedtime were the clients.
Parents read a story out loud only while the child’s thumb stayed out of her mouth.
The moment thumbsucking started, reading stopped; when the thumb came out, reading resumed.
No other rewards or punishers were used.
What they found
All three girls quit thumbsucking within 4–9 nights.
The habit stayed gone when parents checked weeks later.
Parents liked the plan because it was simple and fit the bedtime routine they already had.
How this fits with other research
Capriotti et al. (2017) also used differential reinforcement to cut repetitive body movements—tics instead of thumbsucking.
They compared two DRO schedules and found both worked the same, just like the 1974 study found one simple schedule worked.
Bordi et al. (1990) moved the same in-home idea to adults with brain injuries, but swapped story reading for self-checklists.
That shows the same “do the habit, lose the good thing” rule can travel across ages and topographies.
Why it matters
You can fold this trick into any bedtime routine tonight.
Pick a favorite story, song, or video and make it play only while the thumb, hair-twirl, or pacifier is stopped.
No extra tokens, timers, or data sheets needed—just pause and resume the fun.
Parents learn the rule in one sentence and can run it without you there.
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Join Free →Teach the parent to hold the book, start reading, and stop at first thumb-to-mouth; restart when the hand drops—track for one week.
02At a glance
03Original abstract
Reading stories at bedtime was made contingent upon nonthumbsucking for girls 3, 6, and 8 yr old. According to their mothers, all had been persistent thumbsuckers since infancy. Two had accompanying dental disorders. During baseline conditions, continuous noncontingent reading occurred. During experimental conditions, reading terminated on each occasion thumbsucking was observed and resumed immediately when thumbsucking ceased. High percentages of thumbsucking occurred during baseline conditions when reading was noncontingent, and low percentages occurred during experimental conditions when reading was contingent. Bedtime thumbsucking was eliminated for all three girls.
Journal of applied behavior analysis, 1974 · doi:10.1901/jaba.1974.7-33