Research groups
Research projects
-
Pro-social behavior in rats
We studied pro-social and empathetic behavior in rats by having one rat restrained in a plastic tube and a cagemate that could release the rat.
-
Subjective discounting of delayed rewards
The project examines preference for immediate versus delayed rewards in animal models and in humans to identify variables that control choice.
Publications and research
Scientific publications
Sjøberg, Espen A.
; Ottåsen, Hans Martin;
Wilner, Raquel Gloria
;
Johansen, Espen Borgå
(2023).
Previous experience with delays affects delay discounting in animal model of ADHD.
9 p.
Behavioral and Brain Functions.
Vol. 19.
https://doi.org/10.1186/s12993-022-00199-z
Blystad, Magnus Helgheim; Hansen, Patrick Asare; Andersen, Danielle;
Johansen, Espen Borgå
(2023).
The social release paradigm: investigations of restrainer aversion.
Revista Mexicana de Analisis de la Conducta.
Vol. 49.
https://doi.org/10.5514/rmac.v49.i1.86204
Sjøberg, Espen A.
; Ramos, Sergio; López-Tolsa, Gabriela;
Johansen, Espen Borgå
; Pellon, Ricardo
(2021).
The irrelevancy of the inter-trial interval in delay-discounting experiments on an animal model of ADHD.
Behavioural Brain Research.
Vol. 408.
https://doi.org/10.1016/j.bbr.2021.113236
Blystad, Magnus Helgheim; Andersen, Danielle;
Johansen, Espen Borgå
(2019).
Female rats release a trapped cagemate following shaping of the door opening response: Opening latency when the restrainer was baited with food, was empty, or contained a cagemate.
PLOS ONE.
Vol. 14.
https://doi.org/10.1371/journal.pone.0223039
Sjøberg, Espen A.
;
Johansen, Espen Borgå
(2018).
Impulsivity or Sub-optimal Reward Maximization in Delay Discounting? A Critical Discussion.
Human Ethology.
Vol. 33.
https://doi.org/10.22330/heb/332/022-036
Fasmer, Ole Bernt;
Johansen, Espen Borgå
(2016).
Patterns of motor activity in spontaneously hypertensive rats compared to Wistar Kyoto rats.
13 p.
Behavioral and Brain Functions.
Vol. 12:32.
https://doi.org/10.1186/s12993-016-0117-9
Dervola, Kine-Susann Noren;
Johansen, Espen Borgå
; Walaas, S. Ivar; Fonnum, Frode
(2015).
Gender-dependent and genotype-sensitive monoaminergic changes induced by polychlorinated biphenyl 153 in the rat brain.
Neurotoxicology.
Vol. 50.
https://doi.org/10.1016/j.neuro.2015.07.004
Johansen, Espen Borgå
; Fonnum, Frode; Lausund, Per; Walaas, S. Ivar; Bærland, Nora Elise; Wøien, Grete; Sagvolden, Terje
(2014).
Behavioral changes following PCB 153 exposure in the Spontaneously Hypertensive rat - an animal model of Attention-Deficit/Hyperactivity disorder.
19 p.
Behavioral and Brain Functions.
Vol. 10:1.
https://doi.org/10.1186/1744-9081-10-1
Dervola, Kine-Susann Noren; Roberg, Bjørg Åse; Wøien, Grete; Bogen, Inger Lise; Sandvik, Torbjørn; Sagvolden, Terje; Drevon, Christian A;
Johansen, Espen Borgå
; Walaas, S. Ivar
(2012).
Marine omega-3 polyunsaturated fatty acids induce sex-specific changes in reinforcer-controlled behavior and neurotransmitter metabolism in a spontaneously hypertensive rat model of ADHD.
Behavioral and Brain Functions.
Vol. 8.
https://doi.org/10.1186/1744-9081-8-56
Sagvolden, Terje;
Johansen, Espen Borgå
(2012).
Rat Models of ADHD.
Stanford, Clare; Tannock, Rosemary (Ed.).
Behavioral neuroscience of attention deficit hyperactivity disorder and its treatment. p. 301-316.
Springer Science+Business Media B.V..
https://doi.org/10.1007/7854_2011_126