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Related Concept Videos

Wilcoxon Signed-Ranks Test for Matched Pairs01:09

Wilcoxon Signed-Ranks Test for Matched Pairs

The Wilcoxon signed-rank test for matched pairs evaluates the null hypothesis by combining the ranks of differences with their signs. It essentially tests whether the median of the differences in a population of matched pairs is zero. Since the test incorporates more information than the sign test, it generally yields more trustable conclusions. This test also does not require the data to follow a normal distribution, but two conditions must be met for it to be applicable: (1) the data must...
Sign Test for Matched Pairs01:17

Sign Test for Matched Pairs

The sign test for matched pairs offers a robust method for comparing two paired samples, often for the effects of an intervention in one of them. This method is very useful in situations where the underlying distribution of the data is unknown. The test compares two related samples—often pre- and post-treatment measurements on the same subjects—to determine if there are significant differences in their median values.
To conduct the sign test, we first calculate the differences in value between...
Factors Influencing Attraction III: Similarity01:23

Factors Influencing Attraction III: Similarity

The similarity hypothesis suggests that individuals are more likely to form relationships with others who share similar attitudes, beliefs, values, and interests. This concept has been widely studied in social psychology, demonstrating that perceived similarity fosters interpersonal attraction. In an experiment supporting this hypothesis, participants were presented with fabricated information indicating that strangers held attitudes similar to their own. The results showed that participants...
Causes of Similarity-Dissimilarity Effect01:26

Causes of Similarity-Dissimilarity Effect

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...
Theory of Attribution II: Kelley's Covariation Theory01:29

Theory of Attribution II: Kelley's Covariation Theory

Attribution theory plays a crucial role in social psychology, helping to explain how individuals interpret the causes of behavior. One prominent model within this field is Harold Kelley's covariation theory, which provides a systematic approach to determining whether internal traits or external circumstances drive a person's actions. The model posits that individuals rely on three key types of information—consensus, consistency, and distinctiveness—to make these judgments.Consensus: Comparing...
Law of Independent Assortment02:03

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.

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Related Experiment Video

Updated: May 23, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Two modern developments in matching theory.

J J McDowell

    The Behavior Analyst
    |April 6, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Modern matching theory advances describe human choice behavior, particularly in complex situations. New mathematical models, using power functions, better explain choices in everyday environments and therapeutic settings.

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    Area of Science:

    • Behavioral psychology
    • Mathematical modeling
    • Decision science

    Background:

    • Matching theory mathematically describes choice behavior.
    • Existing models are limited in explaining complex, real-world scenarios.
    • Human choice behavior has therapeutic applications.

    Purpose of the Study:

    • To discuss two modern developments in matching theory.
    • To describe mathematical models for asymmetrical choice situations.
    • To explain the tendency toward indifferent responding.

    Main Methods:

    • Modification of standard matching equations.
    • Introduction of power functions to describe behavior.
    • Analysis of asymmetrical choice situations and indifferent responding.

    Main Results:

    • Asymmetrical choice situations are common in natural human environments.
    • Modified matching equations (power functions) successfully describe behavior.
    • These updated models offer a more accurate representation of human choice.

    Conclusions:

    • Modern matching theory provides improved mathematical descriptions of choice behavior.
    • Power function modifications enhance the applicability of matching theory to real-world situations.
    • These advancements are crucial for understanding and potentially influencing human behavior.