Abstract
Rats worked under a fixed-ratio 45 schedule of reinforcement during 4-hr long sessions either in sixteen 15-min work periods (2 rats in Experiments 1 and 3) or in a single work period (3 rats in Experiments 2 and 4) while receiving varying amounts of external food. In Experiments 1 and 2, a fixed amount of external food was provided in different conditions., whereas in Experiments 3 and 4, both earned and total food intake were fixed to a dally maximum. Consumption and responding decreased with availability compared to nonavailability of external food and systematically declined with increasing amounts of external food in progressively open economies. The independence-quotient statistic was differentially sensitive to the "delay" to the external food. Discriminability enhanced the substitution effect of performance-independent food, resulting in improved efficacy of the statistic and the conditions defined along economic continuum.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 155-172 |
| Number of pages | 18 |
| Journal | Psychological Record |
| Volume | 50 |
| Issue number | 1 |
| State | Published - 2000 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Psychology(all)
Cite this
Molar effects of increasing amounts and immediacy to external food sources in 4-hr sessions. / Imam, Abdulrazaq A.; Hursh, Steven R.
In: Psychological Record, Vol. 50, No. 1, 2000, p. 155-172.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molar effects of increasing amounts and immediacy to external food sources in 4-hr sessions
AU - Imam, Abdulrazaq A.
AU - Hursh, Steven R.
PY - 2000
Y1 - 2000
N2 - Rats worked under a fixed-ratio 45 schedule of reinforcement during 4-hr long sessions either in sixteen 15-min work periods (2 rats in Experiments 1 and 3) or in a single work period (3 rats in Experiments 2 and 4) while receiving varying amounts of external food. In Experiments 1 and 2, a fixed amount of external food was provided in different conditions., whereas in Experiments 3 and 4, both earned and total food intake were fixed to a dally maximum. Consumption and responding decreased with availability compared to nonavailability of external food and systematically declined with increasing amounts of external food in progressively open economies. The independence-quotient statistic was differentially sensitive to the "delay" to the external food. Discriminability enhanced the substitution effect of performance-independent food, resulting in improved efficacy of the statistic and the conditions defined along economic continuum.
AB - Rats worked under a fixed-ratio 45 schedule of reinforcement during 4-hr long sessions either in sixteen 15-min work periods (2 rats in Experiments 1 and 3) or in a single work period (3 rats in Experiments 2 and 4) while receiving varying amounts of external food. In Experiments 1 and 2, a fixed amount of external food was provided in different conditions., whereas in Experiments 3 and 4, both earned and total food intake were fixed to a dally maximum. Consumption and responding decreased with availability compared to nonavailability of external food and systematically declined with increasing amounts of external food in progressively open economies. The independence-quotient statistic was differentially sensitive to the "delay" to the external food. Discriminability enhanced the substitution effect of performance-independent food, resulting in improved efficacy of the statistic and the conditions defined along economic continuum.
UR - http://www.scopus.com/inward/record.url?scp=0034409897&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034409897&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0034409897
VL - 50
SP - 155
EP - 172
JO - Psychological Record
JF - Psychological Record
SN - 0033-2933
IS - 1
ER -