Psych-155

Proportion of responses emiited on a particualr schedule matches the proportion of reinforcers obtained on that schedule

consist of the simultaneous presentation of two or more independent schedules each leading to a rienforcer

When one alternative attracts a higher proportion of responses than would be predicted by matching, regardless of whether that alternative contains the richer or poorer schedule of reinforcement

A pigeons tendency to match (meliorate) has the effect of producing an overll level of reinforcement that is suboptimal

Consisit of choosing a larger later reward over a smaller sooner reward

Consist of choosing a smaller sooner reward over a larger later reward

• o
• Because the animal must forgo the smaller sooner
• reward (subject delays gratification) to obtain the larger later reward

an action carried out at an early point in time that serves either to eliminate or greatly reduce the value of an upcoming tempation

Each individual choice on a self-control task has only a small but cumulative effect on our likelihood of obtaining the desired long-term outcome