Slime Mold solves two-armed bandit problem

Gepostet vor 6 Monaten, 1 Tag in Misc Science Share: Twitter Facebook Mail

slime1

„Brains, pff. Where we are going, we don't need brains.“ Paper: Decision-making without a brain: how an amoeboid organism solves the two-armed bandit.

This [two-armed bandit] problem has previously only been used to study organisms with brains, yet here we demonstrate that a brainless unicellular organism compares the relative qualities of multiple options, integrates over repeated samplings to perform well in random environments, and combines information on reward frequency and magnitude in order to make correct and adaptive decisions.

slime2Von Phys.org: Slime mold gives insight into the intelligence of neuron-less organisms,

In this study, the researchers examined the decision-making ability of slime mold using a test classically used in humans, birds and other brained organisms: the two-armed bandit problem, named for the infamous slot machine, or one-armed bandit. In a two-armed bandit problem, the subject has two levers to pull, each of which delivers a certain, randomly determined reward. One of the levers is more likely to deliver a higher reward overall, so the challenge for participants is to decide at what point to stop exploring both options and decide to exclusively exploit just the one option in order to maximize their payoff. The phenomenon is called the exploration-exploitation tradeoff and is relevant to more than just slot machines, applying to many situations, including investors picking start-up companies to back or drivers choosing a parking space. As such, it has become a classical tool for testing the decision-making abilities of humans and other animals, but it has never before been used on an organism without a brain.

The researchers adapted the two-armed bandit test for slime mold by giving the organism the choice to explore two opposite directions. In each direction, the slime mold encountered discrete patches of food, more or less regularly distributed. One direction would contain more of these patches than the other. They then observed how far in each direction the slime mold would explore before switching to the exploitation of one of the two directions only. The results of these experiments demonstrate that slime mold compares the relative qualities of multiple options, most often choosing the direction with the higher overall concentration of food. It was able to sum up the number of food patches encountered in each direction, as well as the quantity of food present at each patch to make correct and adaptive decisions as to the direction it should move next.

Tags: Biology Brains SlimeMolds

p0

Lasergeschnitzte Papier-Mikroben

Rogan Brown laserschnippselt dreidimensionale Mikroben aus soundsoviel Papier-Layern. Das Bild oben ist seine neueste Arbeit, Control X, Papier-Bakterien under the…

mut

Hyper-Evolution von Bakterien in der Mega Plate-Petrischale

An der Uni Harvard haben sie eine riesige Petrischale gebaut, die „Mega Plate“. In der sind fünf verschiedene Konzentrationen von…

fetus

Pränatale Masturbation is a thing

Wissenschaftler haben einen Fötus beim Wichsen gerendert: „Fetal masturbation has been described previously once in-utero but only as a description…

bunker

Cannibalistic Bunker-Ant-Colony

Bei einem alten, vergammelten Bunker in Polen in Templewo haben sie eine Ameisenkolonie gefunden, die ihr Nest genau über einem…

brain

Inside the Harvard Brain Bank

Hübsches Video voller Brainz aus der Harvard Brain Bank, which „is one of the largest facilities of its kind in…

brainwarp

Lets do the Brain Warp again!

Headline des Monats: A new brain-warp technique that helps to reconstruct fossil brains. I ❤️ new brain-warp techniques. Doing the…

fred

Marijuana mit Gehirn-Einbalsamierung besprüht und geraucht

Beim Kumpel eines jungen Mannes aus Pennsylvania wurde ein menschliches Gehirn gefunden. Der Gentleman hatte seine Marijuana-Zucht mit dem Formaldehyd…

Science recreates microbial Pac-Man

Science recreates microbial Pac-Man

Am University College Norwegen haben sie Mini-Labyrinthe für Mikroben gebaut, um deren natürliche Umgebung zu simulieren. Mit Hilfe von Adam…

eigenface0

Faces reconstructed from Brain-Scans

Wissenschaftler haben Gesichter aus der Hirnaktivität während des Erinnerungsvorgangs extrahiert. Die haben zunächst die Neuro-Reaktion der Versuchsteilnehmer auf über 1000…

Bier aus Bauchnabelflusenbakterien

Bier aus Bauchnabelflusenbakterien

Das neue Bauchnabelflusenbakterienbier der australischen Brauerei 7cent klingt erstmal wie eine weitere langweilige Yuck-Gimmick-[x]madefrom[z]-Story: The process of isolating our own…