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Las variables en los diagramas de dispersión se ven más altamente correlacionadas cuando las escalas se incrementan
Resumen
La percepción de la asociación de variables en los gráficos de dispersión está influenciada por el escalamiento del eje. El aumento de las escalas de eje, que reduce los puntos de datos, mejora la asociación percibida, que difiere del coeficiente de correlación.
Área de la Ciencia:
- Visualización y visualización de datos.
- Psicología de la percepción psicología perceptiva.
Sus antecedentes:
- Los diagramas de dispersión son comunes para visualizar las relaciones entre dos variables.
- El coeficiente de correlación (r) es una medida estadística estándar de la asociación lineal.
Objetivo del estudio:
- Para investigar cómo el escalamiento visual de los diagramas de dispersión afecta a la asociación percibida entre las variables.
- Para comparar la asociación percibida con el coeficiente de correlación estadística.
Principales métodos:
- Los participantes juzgaron la asociación entre las variables presentadas en los diagramas de dispersión.
- Las escalas del eje fueron manipuladas, alterando la densidad visual de los puntos de datos (tamaño de la nube de puntos).
Principales resultados:
- La asociación percibida aumentó a medida que las escalas de los ejes se ampliaron simultáneamente, reduciendo el tamaño de la nube de puntos.
- La asociación juzgada difería significativamente del coeficiente de correlación calculado (r).
Conclusiones:
- El escalamiento visual de los diagramas de dispersión, específicamente el rango de ejes, impacta la asociación percibida independientemente de la correlación estadística.
- Es posible que las medidas estadísticas estándar como "r" no capturen completamente el juicio humano de asociación a partir de representaciones visuales de datos.
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