AN AVERSIVE STIMULUS AS A CORRELATED BLOCK COUNTER IN FR PERFORMANCE.

Pigeons pecked a key on an FR 100 schedule. Every 100 pecks earned food.

While they worked, a brief shock came after each 10-peck block. The shock served as a counter the birds could see and feel.

The team raised or lowered shock strength to learn how aversive events inside a ratio chain change responding.

Stronger shocks made the birds pause longer after food and slow their peck speed.

Weaker shocks only lengthened the pause; speed stayed the same.

The same aversive stimulus can hit different parts of the ratio in different ways.

Leaf et al. (2012) extends this idea. They punished long or short gaps between responses with weak or strong shocks. Weak shocks raised rate when they followed long gaps; strong shocks cut rate when they followed short gaps. Together the papers show shock size and timing decide if behavior goes up or down.

GELLEGOLLUMIGLER (1964) asked a similar schedule question the same year. Goldfish got shocks on 50 % or 100 % of trials. Fewer shock pairings made suppression disappear faster. Both studies reveal that how often and how intense the aversive event is shapes the lasting effect.

Rilling et al. (1969) looked at the other side of the coin. Pigeons worked to escape a light linked to extinction. That stimulus became aversive without any shock. The 1964 shock study and the 1969 extinction study pair up to show stimuli can punish either by direct pain or by signaling no reward.

When you use correction, a brief break, or any stimulus that might feel aversive, think about intensity and timing. A mild correction placed early in a long task may only slow the start. A stronger one may cut both speed and persistence. Check which part of the chain changes after you add the stimulus. You can keep the procedure but get a different result just by tweaking how strong it is and where it lands.