Définition Ecological fallacy

'Ecological' in this case means 'collectively' and goes back to the city ecology of the Chicago school. The term 'ecological fallacy' is used when incorrect conclusions are drawn from aggregated data. Aggregated data are, other than individual data, based on an aggregation of data (e.g. average, percentage).

Let's suppose that there are 30% trade unionists living in an electoral district. At the next election, 30% of votes go to the Democrats. The tempting fallacy: unionists have all voted for the Democratic candidate. Of course, this need not necessarily be the case, from a statistical viewpoint, no interdependence of the data is ensured. It is equally possible that only half of the 30 percentage points came from trade unionists and the other half of union workers gave their votes to other (Republican) candidates.  

Les définitions de notre encyclopédie sont des explications simplifiées de termes. Notre but est de rendre ces définitions compréhensibles pour un large public. Par conséquent, il est possible que certaines d’entre elles ne soient pas entièrement à la hauteur des standards scientifiques.