biserial correlation coefficient
- noun
- /ˈbaɪˌsɪəriəl ˌkɔːrəˈleɪʃən koʊˈɛfɪʃənt/
- Specialized
:
coeficiente de correlación biserial
- Results suggest that SL items have significantly higher point-biserial correlation coefficients than HL items.
- point-biserial correlation coefficient
- item-total biserial correlation coefficient
Examples
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This study was intended to focus on the reliability differences at the item level between hard and soft-linked items using the item-total point-biserial correlation coefficient (PBCC).
Academic text (1999) -
By calculating the biserial correlation coefficient, they assessed the impact of gender on performance in the exam.
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The analysis revealed a strong biserial correlation coefficient between test scores and student attendance.
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Researchers found that the biserial correlation coefficient effectively measured the link between diet and weight loss.
Synonyms
A measure that shows how a number like a test score relates to a two-value category like pass or fail
How Strong
- Specialized
1
3.6
- Specialized
1
8.7
- Specialized
Surface Forms
Morphology
biserial + correlation + coefficient
The compound is partly compositional: a learner who knows 'biserial' (two series), 'correlation' (relationship) and 'coefficient' (numeric measure) can infer it is a numeric measure of a relationship between two groups/series. However, the precise statistical sense — that it refers to the relationship between a continuous variable and a dichotomous variable and how it differs from related measures — is technical and not predictable from everyday knowledge, so full understanding requires specialist exposure.
Etymology
Biserial correlation coefficient gives an image of a small bridge between two kinds of data: biserial suggests 'two parts' and correlation coefficient is a number that shows how closely things move together. So, it is used to show how strong the link is between a 'two-group' thing and a thing that can take 'many values'.