Information on response requirements compared with information on food density as a reinforcer of observing in pigeons.

Attwood et al. (1988) worked with pigeons in a lab chamber.

The birds could peck a key to turn on colored lights.

The lights told the bird what came next: either more food or more work.

The team compared two light cues. One cue signaled upcoming food amounts. The other cue signaled how many pecks would be required later.

They counted how often the pigeons pecked to see each type of cue.

Pigeons pecked far more to see food-amount cues than work-amount cues.

Stimuli linked to food delivery carried stronger reinforcing power.

The value of the predicted event, not just the information itself, drove observing.

Van Hemel (1973) used the same pigeon setup fifteen years earlier. That study showed birds stop looking when cues are pointless or redundant. Attwood et al. (1988) build on this by showing which kind of useful cue wins: food beats work.

Cowie et al. (2011) extend the idea. They found food deliveries themselves act as signals for when and where the next food will arrive. Together the papers say predictive stimuli gain power when they forecast something valuable.

Eisenmajer et al. (1998) seem to clash at first. They showed that unsignaled three-second delays hurt reinforcement. Attwood et al. (1988) never delayed food; they only showed its signal. The studies agree: timing information must be clear for cues to work.

For your clients, the message is simple: link your cues to the good stuff. A token, picture, or word that signals high-quality reinforcement will strengthen attending better than a cue that only warns of extra work. When you design schedules or token boards, highlight what the learner will gain, not what they must do.