ArticlePsychopharmacology2014
Choice for response alternatives differing in reinforcement frequency in dopamine D2 receptor mutant and Swiss-Webster mice.
Article in Psychopharmacology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed, 3 citations in OpenAlex.
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
Abstract
rationaleA previous study showed that dopamine (DA) D2 receptors (D2Rs) are involved in the reinforcing effectiveness of food, but the specific involvement of DA D2Rs in choice among food reinforcers remains unclear.
objectivesThe current study used genetic and pharmacological approaches to assess the role of D2Rs in choice among food-reinforcement frequencies using the generalized matching law (GML), which specifies that logged response and time allocation ratios vary linearly with logged reinforcer ratios.
methodsCongenic D2R knockout (KO) and wild-type (WT) mice were exposed to concurrent variable-interval schedules of reinforcement with scheduled relative-reinforcement rates from 4:1 to 1:4. Effects of the D2R antagonist (-)-eticlopride (0.1-1.0 mg/kg) were assessed in Swiss-Webster mice.
resultsResponse and time allocation ratios were related to obtained reinforcement ratios as predicted by the GML. GML fits accounted for ≥ 92 % of the variance in allocation ratios and did not differ in D2R KO and WT mice. Similarly, there were no significant effects of (-)-eticlopride dose on GML fits, despite effects on overall response rates.
conclusionsThe current results demonstrate that neither deletion nor acute blockade of D2Rs affects choice among response alternatives varying in food-reinforcement frequencies. Because previously published results suggest a role of D2Rs in choice between response alternatives differing in reinforcer magnitude and delay or magnitude and probability, the current findings suggest that D2Rs play a role in choice only among certain parameters of reinforcement. Furthermore, these findings suggest parameters of reinforcement may only be fungible in a complex manner.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.