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Punnett Squares01:00

Punnett Squares

Overview
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.Intraspecific competition, which occurs between individuals of the same species, serves as a natural mechanism for regulating population size. Too much...
Milgram's Obedience to Authority02:20

Milgram's Obedience to Authority

Obedience to authority is classically demonstrated in a more famous series of social psychology experiments performed by Stanley Milgram. He was a social psychology professor at Yale who was influenced by the trial of Adolf Eichmann, a Nazi war criminal. Eichmann’s defense for the atrocities he committed was that he was “just following orders.”
Punnett Squares01:00

Punnett Squares

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Punishment01:27

Punishment

Negative reinforcement and punishment are often confused but serve distinct functions in behavior modification. Reinforcement, whether positive or negative, increases the likelihood of a desired behavior, while punishment decreases it.
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior.
Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective. 
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant factor...

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Updated: Jun 6, 2026

A Conflict Model of Reward-seeking Behavior in Male Rats
06:11

A Conflict Model of Reward-seeking Behavior in Male Rats

Published on: February 20, 2019

勝者は罰しない.

Anna Dreber1, David G Rand, Drew Fudenberg

  • 1Program for Evolutionary Dynamics, Harvard University, Cambridge, Massachusetts 02138, USA.

Nature
|March 21, 2008
PubMed
まとめ
この要約は機械生成です。

高額な罰は,繰り返しプレーする際の協力性を高めますが,グループの報酬は改善しません. 合計報酬が最も高い個人は,高価な罰を避ける傾向があり,協力シナリオでは適応不良である可能性があることを示唆しています.

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関連する実験動画

Last Updated: Jun 6, 2026

A Conflict Model of Reward-seeking Behavior in Male Rats
06:11

A Conflict Model of Reward-seeking Behavior in Male Rats

Published on: February 20, 2019

Setup and Execution Of the Blindfolded Code Training Exercise
05:25

Setup and Execution Of the Blindfolded Code Training Exercise

Published on: March 29, 2019

The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
08:24

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Published on: August 25, 2023

科学分野:

  • 行動経済学は,行動経済学である.
  • 社会心理学 社会心理学とは
  • ゲーム理論はゲーム理論である.

背景:

  • 協力は人間の行動の基本であり,個人の利益と集団の利益とのトレードオフを伴う.
  • 個人が他者を罰するためにコストを負うような高価な刑罰は,協力を高めるために仮定されています.
  • 評判の影響による反復的な相互作用における高価な刑罰の役割は,まだあまり理解されていない.

研究 の 目的:

  • 繰り返されたゲーム環境における協力に対する高額な刑罰の影響を調査する.
  • 高額な刑罰が集団の報酬と個人の結果に影響するかどうかを判断する.
  • 罰則行動と協力ゲームにおける全体的な成功との関係を分析する.

主な方法:

  • 繰り返しゲームシミュレーションを用いた実験経済学.
  • 参加者は,協力,脱退,そして各ラウンドで高価な刑罰のいずれかを選択しました.
  • コントロールグループは,高価な罰のオプションなしでプレイしました.

主要な成果:

  • 高額な刑罰の利用可能性は,観察された協力のレベルを大幅に高めました.
  • 平均的なグループ報酬は,高価な刑罰のオプションで改善されませんでした.
  • 合計報酬と高額な罰則の使用の間に強い負の相関が認められた"勝者"は罰しなかった.

結論:

  • 高額な罰は,繰り返される相互作用における協力を促すことができるが,個人または集団の利益を最大化するために進化的に有利ではないかもしれない.
  • "勝者は罰しない"という行動から,高額な罰は,特定の協力の文脈では適応不良である可能性があることを示唆しています.
  • 単純な協力ゲームを超えて,高価な刑罰の進化的起源と特定の機能を理解するために,さらなる研究が必要です.