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関連する概念動画

Causes of Similarity-Dissimilarity Effect01:26

Causes of Similarity-Dissimilarity Effect

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The similarity-dissimilarity effect, a fundamental concept in social psychology, explains how interpersonal similarities and differences influence attraction and social interactions. This effect is supported by three key psychological perspectives: balance theory, social comparison theory, and consensual validation.Balance Theory and Cognitive ConsistencyBalance theory, developed by Fritz Heider, posits that individuals seek cognitive consistency in their relationships. When two people share...
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Decision Making: P-value Method01:09

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The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim  is also stated. These statements can act as null and alternative hypotheses:  a null hypothesis would be a neutral statement while the alternative hypothesis can...
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The Representativeness Heuristic02:13

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The representative heuristic describes a biased way of thinking, in which you unintentionally stereotype someone or something. For example, you may assume that your professors spend their free time reading books and engaging in intellectual conversation, because the idea of them spending their time playing volleyball or visiting an amusement park does not fit in with your stereotypes of professors.
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Decision Making: Traditional Method01:14

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The process of hypothesis testing based on the traditional method includes calculating the critical value, testing the value of the test statistic using the sample data, and interpreting these values.
First, a specific claim about the population parameter is decided based on the research question and is stated in a simple form. Further, an opposing statement to this claim is also stated. These statements can act as null and alternative hypotheses, out of which a null hypothesis would be a...
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Decision Making01:20

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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
Automatic decision-making is fast, intuitive, and relies on gut feelings...
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Correlations02:20

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Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
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意思決定変数相関を用いたタスク関連表現類似性の定量化

Yu, Qian, Wilson S Geisler

    ArXiv
    |January 16, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    意思決定変数相関(DVC)を導入し、脳とAIモデルがどのように意思決定を行うかを比較します。AIモデルは、サル脳との意思決定戦略の類似性が低く、タスク関連表現の分岐を示唆しています。

    キーワード:
    意思決定変数相関AIと脳の比較タスク関連表現深層ニューラルネットワーク視覚野

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    科学分野:

    • 神経科学
    • 人工知能
    • コンピュータビジョン

    背景:

    • 視覚野の神経表現と深層ニューラルネットワーク(DNN)を比較することは、生物学的および人工的な視覚の両方を理解するために重要である。
    • 以前の研究では、神経活動とDNN表現の類似性に関して、結果はまちまちであった。
    • 一般的な表現アラインメントだけでなく、タスク関連の意思決定戦略を具体的に評価するための新しい方法が必要である。

    研究 の 目的:

    • 意思決定戦略の類似性を定量化する新しいアプローチとして、意思決定変数相関(DVC)を提案し評価すること。
    • サル視覚野(V4/IT)のタスク関連表現と、画像分類でトレーニングされたDNNのタスク関連表現を比較すること。

    主な方法:

    • 内部表現からデコードされた意思決定の画像ごとの相関を測定するために、意思決定変数相関(DVC)を開発した。
    • 分類タスク中のサルV4/ITからの神経記録を収集した。
    • 敵対的トレーニングや大規模データセットでの事前トレーニングを含む、画像分類タスクでトレーニングされた様々なDNNを利用した。

    主要な成果:

    • モデル間およびサル間の類似性は同等であったが、モデルとサルの類似性は一貫して低かった。
    • ネットワークがImageNet-1kで達成したパフォーマンスが向上するにつれて、意思決定変数相関(DVC)は低下した。
    • 敵対的トレーニングと大規模データセットでの事前トレーニングは、タスク関連次元におけるモデルとサルの類似性を改善しなかった。

    結論:

    • 意思決定変数相関(DVC)は、タスク関連情報を効果的に捉え、意思決定戦略の違いを明らかにする。
    • サルV4/ITにおけるタスク関連表現は、標準的な画像分類DNNによって学習されたものとは分岐している。
    • 現在のDNNトレーニング方法は、生物学的視覚と比較して、意思決定戦略のギャップを完全には埋めていない。