Concurrent Second-Order Schedules: Some Effects Of Variations In Response Number And Duration
AUTOR(ES)
Sealey, Diane M
FONTE
Society for the Experimental Analysis of Behavior
RESUMO
To examine the effects on concurrent performance of independent manipulations of response-unit duration and number, 6 hens were exposed to concurrent second-order schedules of reinforcement. Each first-order operant unit required completion of a fixed-ratio schedule within the time specified by a fixed-interval schedule, with one further response completing the fixed-interval schedule. The fixed-ratio and fixed-interval requirements comprising the first-order operant units were systematically and independently varied under three pairs of concurrent variable-interval schedules to produce differences in the first-order response and duration requirements (response and duration differentials). These manipulations produced consistent changes in response, time, and operant-unit biases. A 1:4 response differential biased the time and operant-unit measures towards the smaller fixed ratio, but to a degree less than the imposed response differential. The response-based biases favored the larger fixed ratio. Duration differentials of 4:1 and 8:1 biased the response and operant-unit measures towards the shorter fixed interval, again less than the imposed duration differential, but the time biases remained close to zero. Both sorts of differentials acted to bias operant-unit completions more systematically than the other measures, but undermatching to the differentials occurred. The undermatching appears to have arisen from a pattern of fix and sample (in which visits to the less preferred alternative involved only a single completed operant unit) under combinations of unequal operant-unit requirements and reinforcer rates. The response and time bias measures appeared to arise as by-products of the changes in operant-unit completions.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1243895Documentos Relacionados
- THE RATES OF SECOND-ORDER GAS REACTIONS
- Second-Order Olfactory-Mediated Fear-Potentiated Startle
- Letter recognition reveals pathways of second-order and third-order motion
- CONJUGATE POINTS OF SECOND-ORDER LINEAR DIFFERENTIAL EQUATIONS
- Local Preference In Concurrent Schedules: The Effects Of Reinforcer Sequences