Evidence map›Paper›PMID 25637881›Full record

ArticleBehavioural processes2015

Quantitative analysis of performance on a progressive-ratio schedule: effects of reinforcer type, food deprivation and acute treatment with Δ⁹-tetrahydrocannabinol (THC).

C M Olarte-Sánchez, L Valencia-Torres, H J Cassaday, C M Bradshaw, E Szabadi

Abstract read
In one paragraph

Article in Behavioural processes, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

  1. Article
  2. Efficacy of Edible and Leisure Reinforcers with Domestic Dogs.Animals : an open access journal from MDPI · 2023
    Article
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  15. Activation of Ventral Tegmental Area 5-HTNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2017
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

C M Olarte-SánchezPsychopharmacology Section, Division of Psychiatry, University of Nottingham, UK. Electronic address: colarte-sanchez@abdn.ac.uk.
L Valencia-TorresPsychopharmacology Section, Division of Psychiatry, University of Nottingham, UK. Electronic address: lourdes.valencia-torres@abdn.ac.uk.
H J CassadaySchool of Psychology, University of Nottingham, UK. Electronic address: helen.cassaday@nottingham.ac.uk.
C M BradshawPsychopharmacology Section, Division of Psychiatry, University of Nottingham, UK. Electronic address: C.M.Bradshaw@hotmail.ac.uk.
E SzabadiPsychopharmacology Section, Division of Psychiatry, University of Nottingham, UK. Electronic address: elemer.szabadi@nottingham.ac.uk.

Funding

Medical Research Council
6 · The paper itself

Abstract

Rats' performance on a progressive-ratio schedule maintained by sucrose (0.6M, 50 μl) and corn oil (100%, 25 μl) reinforcers was assessed using a model derived from Killeen's (1994) theory of schedule-controlled behaviour, 'Mathematical Principles of Reinforcement'. When the rats were maintained at 80% of their free-feeding body weights, the parameter expressing incentive value, a, was greater for the corn oil than for the sucrose reinforcer; the response-time parameter, δ, did not differ between the reinforcer types, but a parameter derived from the linear waiting principle (T0), indicated that the minimum post-reinforcement pause was longer for corn oil than for sucrose. When the rats were maintained under free-feeding conditions, a was reduced, indicating a reduction of incentive value, but δ was unaltered. Under the food-deprived condition, the CB1 cannabinoid receptor agonist Δ(9)-tetrahydrocannabinol (THC: 0.3, 1 and 3 mg kg(-1)) increased the value of a for sucrose but not for corn oil, suggesting a selective enhancement of the incentive value of sucrose; none of the other parameters was affected by THC. The results provide new information about the sensitivity of the model's parameters to deprivation and reinforcer quality, and suggest that THC selectively enhances the incentive value of sucrose.

Indexed as

FoodAnimalsAppetite StimulantsConditioning, OperantCorn OilDose-Response Relationship, DrugDronabinolFemaleFood DeprivationPsychomotor PerformanceRatsRats, WistarReinforcement ScheduleSucroseSweetening AgentsAppetite StimulantsCorn OilDronabinolSucroseSweetening AgentsCorn oilFood deprivationIncentive valueMathematical modelMathematical Principles of ReinforcementProgressive-ratio scheduleRatSucroseΔ(9)-Tetrahydrocannabinol

Identifiers

PMID25637881
PMCPMC4534516

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Registered trials

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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.