Intermittent reinforcement
Rewards delivered unpredictably, rather than every time, produce behaviour that is more persistent and harder to extinguish. In relationships, warmth that comes and goes hooks people more than steady warmth.
What drives it
Unpredictable reward keeps the other person striving and watching; for the giver it buys attention and compliance cheaply. It explains why someone stays attached to a boss or partner who treats them badly most of the time.
How it shows
Work
The founder who ignores you for weeks, then calls late at night to say you're the only one who gets it. Praise that is rare and unpredictable makes a team work harder for it and explain away the cold spells. Opaque bonus and promotion decisions work the same way.
Relationships
Hot and cold: days of affection, then silence or criticism, then reconciliation. The good days are remembered as the 'real' person. Each return feels like a jackpot.
Self
You check your phone compulsively, replay the good moments, and the relief when they're warm is out of proportion. Consistent kindness from someone else feels flat by comparison.
What tells it apart
Trauma bonding: Intermittent reinforcement is the mechanism; trauma bonding is the resulting attachment when the unpredictable reward is mixed with harm and a power gap.
Anxious-preoccupied attachment: An anxious person is preoccupied even with a reliable partner; intermittency-driven craving is tied to one person's unpredictability and eases when they become consistent or are gone for a long stretch.
A test
Map the warmth over a month: if your attachment rises after the cold spells rather than during the warm ones, intermittency is driving it.
Questions to carry
- Mapped over a month, when does the pull toward this person rise, after the warm days or after the cold ones?
- When warmth comes and goes with someone, what am I waiting for each time it goes?
How strong the research is
moderate. The learning principle is among the most robust in psychology; its use to explain attachment to unreliable partners or bosses is a reasonable extrapolation with supporting but less direct evidence.
Where it comes from
Charles Ferster and B. F. Skinner, 1957 (Schedules of Reinforcement); applied to abusive bonds by Donald Dutton and Susan Painter, 1981